Installation/Operation Manual with Service Replacement Parts
Undercounter
Dishwashers
(with pumped final rinse)
Models:
201HT
High temperature w/booster
201HTN High temperature w/o booster
201LT
401HT
Low temperature chemical sanitizing
High temperature w/booster
201HT
401HTN High temperature w/o booster
501HT
High temperature w/booster
501HTN High temperature w/o booster
501LT
Low temperature chemical sanitizing
401HT
Dishwasher serial no.
501HT
Issue Date: 3.15.11
Manual P/N 0512240 rev. K
For machines beginning with S/N W11948 and above
3765 Champion Boulevard
Winston-Salem, NC 27105
336/661-1992 Fax: 336/661-1660
Toll-free: 800.858.4477
2674 N. Service Road, Jordan Station
Ontario, Canada L0R 1S0
905/562-4195 Fax: 905/562-4618
Toll-free: 800.263.5798
Printed in USA
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In Canada you can Register by Postage Paid Mail:
Cut along the dashed lines, then complete the back of the postage paid card above and mail
immediately to validate your machine warranty.
OR
REGISTER YOUR PRODUCT ONLINE
Make sure you are connected to the internet then click or enter the address below.
In the U.S.A
In Canada
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PRODUCT REGISTRATION CARD
Model
Serial #
Date of Installation:
Company Name:
Address:
(Street)
Province
Postal Code
Telephone #: (
Contact:
)
---
Installation Company:
Address:
Telephone #:
Contact:
FAILURE TO REGISTER YOUR PRODUCT MAY VOID YOUR WARRANTY
IMPORTANT IMPORTANT
REGISTER YOUR PRODUCT ONLINE
Make sure you are connected to the internet then click or enter the address below.
In the U.S.A
In Canada
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Revision History
Revision History
We reserve the right to make changes to this manual without notice and without incurring any liability by making the
changes. Equipment owners may request a revised manual, at no charge, by calling 1 (800) 858-4477 in the USA or
by calling 1 (800) 263-5798 in Canada.
Revision
Date
Revised
Pages
Serial Number
Effectivity
Revision
Description
9.15.06
3.22.07
All
59
W11948
W11948
Released first edition
Revised Schematic
Solid State Timer Service
11.26.07
12.1.07
iii, 3-6, 28-29,
30-31, 32-33,
61-66
W14236
W14478
Installation, schematics
MTB, Booster interlock
2KW wash tank Heater
32-33
Booster control thermostat
P/N changed from 109069
to 0512108
6.10.09
6.10.09
All
W14236
Released rev. D of manual
42-43
W081217467
Added P/N 0712105 Timer
Bd. to Parts List
6.10.09
6.10.09
70
W081217467
W081217467
Added Timer Bd.
Diagnostic Instructions
28-29
Added Thermostat
Adapter to booster
10.5.09
30-31
W14236
Changed Contactor P/N
from 107369 to 112518
2.25.10
2.25.10
15
W100120006
W100120006
Revised 401HT Operation
28-29
Revised 401HT Booster
adding Rinse
Thermometer Tee
2.25.10
46-47
W100120006
Revised Thermometer P/N's
Revised Front Panel P/N's
2.25.10
10.4.10
52-53
49
W100120006
W100120006
Changed Item 13 P/N from
0312183 to P/N 0312181
1.4.11
21
W100120006
W100120006
Added Drain hose to
Troubleshooting Chart
Corrected Item Numbering
44-45
3.15.11
24-25
26-27
All
All
Added P/N for motor shield
Added 401 tank components
i
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Revision History
Revision History (continued)
Revision
Date
Revised
Pages
Serial Number
Effectivity
Revision
Description
ii
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Blank Page
This Page
Intentionally
Left Blank
iii
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Limited Warranty
LIMITED WARRANTY
Moyer Diebel, 3765 Champion Boulevard, Winston-Salem, North Carolina 27105, and P.O. Box 301, 2674 N. Service Road,
Jordan Station, Canada, L0R 1S0, warrants machines, and parts, as set out below.
Warranty of Machines: Moyer Diebel warrants all new machines of its manufacture bearing the name
"Moyer Diebel" and installed within the United States and Canada to be free from defects in material and workman
ship for a period of one (1) year after the date of installation or fifteen (15) months after the date of shipment by
Moyer Diebel, whichever occurs first. [See below for special provisions relating to glasswashers.] The warranty
registration card must be returned to Moyer Diebel within ten (10) days after installation. If warranty card is not
returned to Moyer Diebel within such period, the warranty will expire after one year from the date of shipment.
Moyer Diebel will not assume any responsibility for extra costs for installation in any area where there are
jurisdictional problems with local trades or unions.
If a defect in workmanship or material is found to exist within the warranty period, Moyer Diebel, at its election,
will either repair or replace the defective machine or accept return of the machine for full credit; provided;
however, as to glasswashers, Moyer Diebel's obligation with respect to labor associated with any repairs shall end
(a) 120 days after shipment, or (b) 90 days after installation, whichever occurs first. In the event that Moyer Diebel
elects to repair, the labor and work to be performed in connection with the warranty shall be done during regular
working hours by a Moyer Diebel authorized service technician. Defective parts become the property of Moyer Diebel.
Use of replacement parts not authorized by Moyer Diebel will relieve Moyer Diebel of all further liability in connection
with its warranty. In no event will Moyer Diebel's warranty obligation exceed Moyer Diebel's charge for the machine.
The following are not covered by Moyer Diebel's warranty:
a. Lighting of gas pilots or burners.
b. Cleaning of gas lines.
c. Replacement of fuses or resetting of overload breakers.
d. Adjustment of thermostats.
e. Adjustment of clutches.
f. Opening or closing of utility supply valves or switching of electrical supply current.
g. Cleaning of valves, strainers, screens, nozzles, or spray pipes.
h. Performance of regular maintenance and cleaning as outlined in operator’s guide.
i. Damages resulting from water conditions, accidents, alterations, improper use, abuse,
tampering, improper installation, or failure to follow maintenance and operation procedures.
j. Wear on Pulper cutter blocks, pulse vanes, and auger brush.
Examples of the defects not covered by warranty include, but are not limited to: (1) Damage to the exterior or
interior finish as a result of the above, (2) Use with utility service other than that designated on the rating plate,
(3) Improper connection to utility service, (4) Inadequate or excessive water pressure, (5) Corrosion from
chemicals dispensed in excess of recommended concentrations, (6) Failure of electrical components due to
connection of chemical dispensing equipment installed by others, (7) Leaks or damage resulting from such
leaks caused by the installer, including those at machine table connections or by connection of chemical
dispensing equipment installed by others, (8) Failure to comply with local building codes, (9) Damage
caused by labor dispute.
Warranty of Parts: Moyer Diebel warrants all new machine parts produced or authorized by Moyer Diebel to be free
from defects in material and workmanship for a period of 90 days from date of invoice. If any defect in
material and workmanship is found to exist within the warranty period Moyer Diebel will replace the defective
part without charge.
DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY. MOYER DIEBEL'S WARRANTY IS ONLY TO THE
EXTENT REFLECTED ABOVE. MOYER DIEBEL MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUD-
ING, BUT NOT LIMITED, TO ANY WARRANTY OF MERCHANTABILITY, OR FITNESS OF PURPOSE. MOYER DIEBEL
SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. THE REMEDIES SET OUT ABOVE ARE
THE EXCLUSIVE REMEDIES FOR ANY DEFECTS FOUND TO EXIST IN MOYER DIEBEL DISHWASHING MACHINES
AND MOYER DIEBEL PARTS, AND ALL OTHER REMEDIES ARE EXCLUDED, INCLUDING ANY LIABILITY FOR
INCIDENTALS OR CONSEQUENTIAL DAMAGES.
Moyer Diebel does not authorize any other person, including persons who deal in Moyer Diebel dishwashing machines
to change this warranty or create any other obligation in connection with Moyer Diebel Dishwashing Machines.
iv
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Table of Contents
Table of Contents
Model 201, 401, 501 Undercounter Dishwashers
Revision History
Limited Warranty
...........................................................................................................i
...........................................................................................................ii
Model Descriptions ...........................................................................................................iv
Installation ..............................................................................................1
Receiving....................................................................1
Electrical Connections ................................................2
Water Connections .....................................................6
Drain Connections ......................................................7
Initial Start-up.......................................................................................... 8
Booster Fill Switch ...................................................... 8
Check List................................................................... 9
Chemical Dispensing Pumps......................................10
Priming ..............................12
Adjustments.......................13
Operation................................................................................................................ 14
Normal Wash Mode ....................................................14
Scrub Mode (extended wash) ....................................15
Rinse Sentry Mode .....................................................15
Drain Operation ..........................................................16
Cleaning and Maintenance........................................................................17
Cleaning......................................................................17
De-liming.....................................................................19
Maintenance ...............................................................20
Troubleshooting ..........................................................21
Service Replacement Parts.......................................................................23
Electrical Schematics............................................................................................55
Timer Chart .............................................................................................62
Basic Service ..........................................................................................63
v
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Model Description
Model Description
201-HT, 401-HT, and 501-HT Models
Pumped final rinse high temperature sanitizing dishwasher
with built-in 40°F rise stainless steel electric booster.
Single Phase to Three Phase Field Conversion.
201-HTN, 401-HTN, and 501-HTN Models
Pumped final rinse high temperature sanitizing dishwasher
without built-in 40°F rise stainless steel electric booster.
201-LT, 501-LT Model
Pumped final rinse low temperature chemical sanitizing dishwasher
with 3 built-in chemical dispensing pumps.
Optional Equipment (consult factory)
70°F/39°C rise built-in booster heater
70°F/39°C rise booster heater element-P/N 111233, Gasket- P/N 109985
1-RDT Right-hand sink - P/N 403562
1-RDT Left-hand sink - P/N 403561
17" Stand - P/N 0708757
17" Storage cabinet - P/N 0703593
6" Stand - P/N 0712393
Peg dish rack - P/N 101285
Flat-bottom dish rack - P/N 101273
Drain water tempering kit - 0712382-1
vi
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Installation
Receiving
NOTE:
The installation of your dishwasher must be performed by qualified service personnel.
Problems due to improper installation are not covered by the Warranty.
1. Inspect the outside of the dishwasher carton for signs of damage.
2. Remove the carton and inspect the dishwasher for damage.
3. Check for any accessories that may have shipped with your dishwasher.
4. Turn to the front of this manual and follow the instructions to register your machine online.
5. Move the dishwasher near its permanent location.
CAUTION:
Be careful when lifting and moving the dishwasher to prevent damage to the machine.
NOTE:
The installation of the dishwasher must comply with local health codes.
6. Compare the installation site utility connections with the dishwasher utility connections and
make sure they are the same.
7. The dishwasher can be installed as a free-standing unit or under a built-in counter-top.
The typical counter-top height in most locations is 34" [86cm].
8. Under counter installations should provide storage space for the dishwasher chemical supply
containers. Containers must not be placed above the floor.
9. Chemical supply containers should be placed as
Wall
close to the machine as possible.
10. Place the dishwasher in its permanent location.
Counter-top
11. The dishwasher has 4 adjustable feet for
leveling.
12. Level the dishwasher front-to-back and
side-to-side.
34"
[86cm]
Min.
Floor
3" [8cm] Min.
1
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Installation
Electrical Connections
For Model 201HT, 401HT, and 501HT machines beginning with S/N 14236 and above
1. Refer to the connection diagrams below.
2. Models 201HTN /LT, 401HTN, 501HTN /LT are equipped with a
4 ft. power cord/plug and only require a 115VAC,15A receptacle.
3. Models 201HT, 401HT, and 501HT 1 PH machines require a
3-wire plus ground supply which includes a current carrying neutral.
4. Models 201HT, 401HT, and 501HT 3 PH machines
require a 4-wire plus ground supply which includes a current carrying neutral.
5. Power connections are made at the Main Terminal Block (MTB) which is
located at the lower right-hand side of the dishwasher directly behind the
lower front access panel.
Pull the MTB out to wire
main incoming power.
6. Remove the MTB cover and 2 screws holding the MTB to the machine base.
Then, pull the MTB up and forward to make the electrical connections.
7. Provide a 3 ft. service loop in the supply cable for servicing.
8. Re-install the MTB and the lower front access panel to complete the installation.
THREE PHASE POWER CONNECTION
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1. Check the data plate on the front of the
dishwasher for the phase of the machine.
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4. The Main Terminal Block has terminals for
L1, L2, L3, Neutral and Ground.
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5. Connect ground, then connect
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ATTENTION
Models 201HTN, 201LT, 401HTN, 501HTN, 501LT are equipped with a 4 ft. power cord and plug.
These models only require a 115VAC,15A receptacle.
2
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Installation
Electrical Connections
For machines built prior to S/N 14236
WARNING:
Electrocution or serious injury may result when working on an
energized circuit.
Disconnect power at the main breaker or service disconnect
switch before working on the circuit.
Lock-out and tag the breaker to indicate that work is being
performed on the circuit.
ATTENTION
A qualified electrician must connect the main incoming power to the dishwasher in accordance with all local
codes and regulations or in the absence of local codes in accordance with the National Electrical Code.
L1
L2
N
L1
L2
208-230
VAC
115VAC
15A
4 ft. power cord w/plug supplied
115VAC
Model 201HT, 401HT, 501HT
Prior to S/N 14236
Model 201HTN / LT, 401HTN, 501HTN /LT
All S/N's
Note:
Models 201HTN, 201LT, 401HTN, 501HTN, 501LT are equipped with a 4 ft. power cord and plug.
These models only require a 115VAC,15A receptacle.
1. Refer to the connection diagrams above.
2. Models 201HTN /LT, 401HTN, 501HTN /LT are equipped with a 4 ft.
power cord/plug and only require a 115VAC,15A receptacle.
3. Models 201 HT, 401HT, and 501HT 1 PH machines require
a 3-wire plus ground supply which includes a current carrying neutral.
4. Models 201 HT, 401HT, and 501HT 3 PH machines require a
4-wire plus ground supply which includes a current carrying neutral.
5. Power connections are made at the Main Terminal Block
(MTB) which is located at the lower right-hand side of the
dishwasher directly behind the lower front access panel.
6. Remove the MTB cover and 2 screws holding the MTB
to the machine base. Then, pull the MTB up and forward
to make the electrical connections.
7. Provide a 3 ft. service loop in the supply cable for servicing.
8. Re-install the MTB and the lower front access panel to
complete the installation.
Main Terminal Block (MTB)
shown pulled out of dishwasher front
to wire main incoming power
3
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Installation
Electrical Connections (continued)
For Models 201HT, 401HT, and 501HT beginning with S/N 14236 and above
WARNING:
Electrocution or serious injury may result when working on an
energized circuit.
Disconnect power at the main breaker or service disconnect
switch before working on the circuit.
Lock-out and tag the breaker to indicate that work is being
performed on the circuit.
Booster Heater Element
Field Conversion from Single to Three Phase Operation
Dishwashers shipped from the factory wired for 1 phase operation can be changed to 3 phase
operation by following the procedure below.
1. Disconnect the main incoming power at the main service disconnect breaker or switch.
2. Remove the lower front access panel,
3. Remove the booster heater element cover.
4. Locate the 1H3 booster heater wire stored on the right-side of the booster tank.
5. Disconnect the existing booster heater wires and change the booster heater element
jumpers as shown in the illustration below
6. Connect wires 1H1, 1H2, and 1H3 as shown.
7. Re-install the booster heater cover.
8. A replacement 3PH data plate is stowed on the back of the lower front access panel.
Remove the existing 1PH data plate on the front of the panel with the new 3PH data plate.
Discard the 1PH data plate.
9. Contact a qualified electrician to change the incoming service power to 3PH. An illustration
of the power connections on the Main Terminal Block is on the next page.
Booster Heater
Connected for 3PH
Booster Heater
Connected for 1PH
Wire not
connected
1H1
1H2
1H1
1H2
1H3
1H3
Booster heater element connections shown for 1 phase and 3 phase operation.
4
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Installation
Booster Heater Element
Field Conversion from Single to Three Phase Operation (continued)
Main Terminal Block (MTB)
ATTENTION ELECTRICIAN:
No power when booster
heater is connected for 1 PH
The Main Terminal Block (MTB) is a 4-wire
connection block which includes a current-carrying
neutral. The block can be connected for 3PH or 1PH
depending on how the booster heater is wired (
see the previous page). Refer to the diagram to the
right and connect the main incoming electric service
accordingly. The data plate on the lower front
cover of the dishwasher provides the correct power
requirements.
L1
L2
L3
N
Contact the local authorized service agent if there
are any questions concerning the proper power
connections.
To
Auxiliary
Contactor
115VAC
To booster
heater contactor
1PH
208-230VAC
No power when booster
heater is connected for 1 PH
Booster Heater/Wash Tank Heater Interlock Circuit
For Model 201HT, 401HT, 501HT dishwashers beginning with S/N 14236 and above.
The booster heater/wash tank heater interlock circuit removes power from the wash tank heater whenever
the booster heater contactor energizes. The illustration below shows how the booster heater contactor is
wired. The booster heater contactor is located behind the lower front access panel.
Auxiliary
Contactor
Interlock Circuit Operation
1. The dishwasher fills with water when the
main power switch on the dishwasher is turned on.
The booster heater thermostat calls for heat
which energizes the booster heater contactor.
L1
N
From
main
terminal block
115 VAC
To wash
tank heater
115VAC
2. The auxiliary contact on the top of the contactor
opens and removes power from the wash tank
heater.
L2
L1
From
main
terminal block
1 PH
3. When the booster heater thermostat is
satisfied, the booster heater contactor de-
energizes and the auxiliary contacts close
applying power to the wash tank heater.
208-230VAC
1H3
L3
1H1
No power
when booster
heater is
connected for
1 PH
To booster heater
1 PH 208-230VAC
No power when booster
heater is connected for 1 PH
1H2
Booster Heater
Contactor
4. This operation is repeated whenever the
booster thermostat calls for heat.
5
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Installation
Water Connections
NOTE
Plumbing connections must comply with national, local plumbing and sanitary codes.
IMPORTANT
Make sure that the flexible water supply and drain hoses are not kinked.
1. All models have a 6 ft./1.8m flexible hot water fill hose with a 3/4" female garden hose
connector.
2. A 1/2" or larger main incoming supply line should be installed to the dishwasher.
3. A 1/2" or larger shut-off valve should be installed in the main water supply as close to the
dishwasher as possible for service.
4. All models have a built-in flow control. The incoming hot water supply pressure must be
between 25-95 psi/173-655 kPa.
5. For Models 201HT, 401HT, and 501HT:
For the 40°F/ 22°C rise booster, the hot water supply must provide a minimum of
140°F/60°C, measured at the dishwasher.
For the 70°F/39°C rise booster the hot water supply must provide a minimum of 110°F/43°C
measured at the dishwasher.
6. For Models 201HTN, 401HTN, 501HTN:
The hot water supply must provide a minimum of 180°F/82°C, measured at the dishwasher
for The incoming hot water supply line must be a 1/2" or larger.
7. Models 201LT, 501LT:
The hot water supply must provide a minimum of 140°F/60°C, measured at the dishwasher.
6
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Installation
Drain Connections
ATTENTION
Do not connect the drain hose to a disposer. The dishwasher will not drain correctly.
NOTE
The dishwasher drains in 8 seconds and drain water exits the hose with considerable force.
1. All models have a 6 ft. 5/8" I.D. drain hose. The maximum drain height connection
must not exceed 3 ft.[0.9 m].
2. The drain hose is located at the rear of the dishwasher. A 5/8" hose-barb fitting is
strapped to the drain hose to connect the drain hose.
3. The drain hose is secured to the rear of the machine by a clamp to maintain a
goose-neck bend in the drain hose.
DO NOT REMOVE THE DRAIN HOSE RETAINING CLAMP.
DO NOT STRETCH THE DRAIN HOSE.
4. Install the drain hose to a "WYE" drain fitting. Connection to a "TEE" fitting will
prevent the dishwasher from draining completely.
5. The maximum drain flow is 15 US gpm/12.5 Imp gpm/57 Lpm
6. Make sure the drain hose does not kink. Kinks will prevent the dishwasher
from draining completely.
Do not connect the dishwasher
flexible drain hose to a TEE fitting.
The dishwasher flexible drain hose
must be connected to a WYE fitting.
7
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Initial Start-up
Filling the Booster
For Models 501HT, 401HT, and 201HT
Note:
The dishwasher contains a built-in booster heater that was drained prior to shipment
and must be filled with water before operating the dishwasher.
Booster Fill Switch
The booster heater is filled using the Booster
Fill Switch. It is located behind the lower front
access panel in the center of the bracket that
holds the chemical dispensing pumps (see the
photos to the right).
Fill the booster heater:
1. Make sure the dishwasher power switch
is OFF.
A
2. Remove the lower front access panel.
3. Locate the booster fill switch. It is in the
left-center of the electrical component
panel.
4. Make sure the Booster Fill Switch is in
the middle position, (see A).
5. Turn the water supply and the main
power supply on.
DO NOT TURN THE DISHWASHER
POWER SWITCH ON.
B
6. Push and hold the switch to the FILL
position (see B) until you hear water
entering the wash compartment,
then release the switch.
7. Push the Booster Fill Switch to the ON
position and release (see C).
C
8
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Initial Start-up
Check List
All Models
1. Remove any protective film from dishwasher.
2. Check the interior for foreign material.
3. Make sure the dishwasher is permanently located.
4. Make sure all utility connections are complete.
5. Make sure the flexible drain hose and the hot water fill hose are not kinked.
6. Make sure that the chemical supply containers are full and the chemical pick-up tubes
are installed in the proper containers.
7. Make sure the scrap screen is in place.
8. Make sure the spray arms are in place and that they spin freely.
9. Close the dishwasher door.
10. Turn hot water supply on and check for leaks in the main water supply piping connected
to the dishwasher.
Install Scrap Screen
9
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Initial Start-up
Chemical Dispensing Pumps
Models 501HT, 501HTN, 401HT, 401HTN, 201HT, 201HTN
1. Models 201HT, 201HTN, 401HT, 401HTN, 501HT, and 501HTN:
are equipped with a built-in detergent dispensing pump and a rinse-aid dispensing pump.
The pumps are located behind the lower front access panel.
Chemical Injection Point
Chemical Dispensing Pumps for
Chemical Pick-up Tubes,
High Temperature HT and HTN
stiffener tubes & line
Models.
strainers.
2. Each pump is equipped with a line-strainer, stiffener tube and 6 ft. of pick-up tubing.
The pick-up tubes are marked with colored labels that identify the type of chemical used.
RED
BLUE
= Detergent
= Rinse-Aid
(Non-chlorinated)
(Consult chemical supplier)
WHITE = Sanitizer
(LT ONLY)
(5.25% Sodium hypochlorite (chlorine bleach) solution.
3. Make sure the stiffener tubes are placed in the correct chemical supply container
(chemicals supplied by others).
4. The chemical supplier must adjust the dispensers to deliver the correct amount of
chemicals to the dishwasher.
5. Chemical containers must be placed as close to the dishwasher as possible.
Do not elevate the containers above the finished floor.
10
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Initial Start-up
Chemical Dispensing Pumps
Models 501LT and 201LT
ATTENTION
(For LT Models Only), 5.25% sodium hypochlorite (chlorine bleach) must be used as a
sanitizing agent to provide a minimum concentration of 50 ppm in the final rinse.
The 50 ppm concentration must be checked using chlorine test strips to make sure that the
proper concentration is maintained
1. Models 501LT and 201LT are equipped with a built-in
detergent, rinse-aid, and sanitizer dispensing pumps
(See the photograph at right).
2. The pumps are located on a center bracket behind the
lower-front access panel.
3. The pick-up tubes are marked with colored labels that
identify the type of chemical used:
RED
BLUE
= Detergent
= Rinse-Aid
(Non-chlorinated)
(Consult chemical supplier)
WHITE = Sanitizer
(5.25% Sodium hypochlorite
(chlorine bleach) solution.
The chemicals enter the wash tank compartment through
a fitting on the right-side of the wash compartment.
4. The detergent supply should be a non-chlorinated
liquid detergent, the chemical supplier will determine an
appropriate rinse agent. Your chemical supplier should
adjust the dispensers for the supplied product.
501LT and 201LT Chemical Dispensers
5. Place the chemical supply containers
as close to the dishwasher as possible.
6. Do not elevate the chemical containers
above the finished floor.
Chemical Injection Point
Chemical Pick-up Tubes,
stiffener tubes & line
strainers.
11
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Initial Start-up
Chemical Dispensers
Priming the Chemical Dispensing Pumps
Models 501HT, 501HTN, 401HT, 401HTN, 201HT, 201HTN
1. Make sure the chemical containers are full and the correct pick-up tubes are in the
containers.
2. Turn the dishwasher power switch ON. The switch will illuminate and the
dishwasher will fill with water.
3. Open the dishwasher door, then push and hold the prime push button UP to the
DET position until detergent is observed entering the wash tank compartment.
4. Push and hold the prime push button DOWN to the RINSE position until rinse-aid
enters the wash tank compartment. Release the push button.
5. Priming is complete.
DET
R/A
PRIME
Prime Switch
Model Series 501
Models 501LT, and 201LT
1. Make sure the chemical containers are full and the correct pick-up tubes are in the
containers.
2. Turn the dishwasher power switch ON. The switch will illuminate and the dishwasher
will fill with water.
3. The Prime push button primes the Sanitizer pump and the Rinse-aid pump.
The Detergent pump does not have a prime push button. During normal operation,
observe the detergent pick-up tubing to make sure that air bubbles are moving
through the tubing which indicates that the detergent is being dispensed.
4. Open the dishwasher door, then push and hold the prime push button UP to the
SANI position until sanitizer enters the wash tank compartment. Release the PRIME
push button.
5. Push and hold the Prime push button DOWN to the RINSE position until rinse-aid
is observed entering the wash tank compartment. Release the Prime push button.
6. Priming is complete.
ON
DET
I
START
POWER
O
R/A
PRIME
OFF / DRAIN
Prime Switch
Model Series 401, 201
12
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Initial Start-up
Chemical Dispensers
All Models
Chemical Dispensing Pump Speed and Tank Fill Adjustments
Note:
The chemical dispensing pump speeds are not set at the factory because variations in the
type of chemicals supplied by the chemical supplier usually require that the supplier
make final the adjustments.
1. Adjustment screws are provided for the dispensing pumps and for the wash tank fill. They are
located on the right-side of the dishwasher behind the lower front access panel.
2. Make sure the chemical containers are full and the
pick-up tubes are in the proper containers.
3. Turn the dishwasher power switch ON.
The switch will illuminate and the dishwasher
will fill with water.
4. The chemical supplier should run a normal dishwasher
cycle and test detergent and rinse-aid concentrations
according to the chemical supplier's instructions.
Caution:
Excessive pressure to the potentiometers when adjusting can result in
bent or broken adjusting screws.
5. Each dispensing pump has a clearly marked
adjustment screw. Turn the screw CW to increase
the time of the dispensing pump and CCW to
reduce the dispensing pump time.
6. The Fill adjustment screw will provide a small
change in the tank water level. If a large adjustment
Turning the chemical dispenser
adjusting Screws increase or
decrease the chemical dispensed.
is needed, then check the incoming water pressure
making sure the fill hose is not kinked. If the above items
are okay then the size of the incoming water supply
should be evaluated.
7. NOTE:
For Models 501HT, 501HTN,
use detergent and rinse-aid only, a sanitizer
is not required.
8. For Model 501LT and 201LT, detergent, rinse-aid and
sanitizer are used.
Proper Water Level in the Wash Tank.
5.25% sodium hypochlorite (chlorine beach) must be used as a sanitizing agent to provide a
minimum concentration of 50 ppm in the final rinse. The 50 ppm concentration must be checked
using chlorine test strips to make sure that the proper concentration is maintained.
13
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Operation
Normal Wash Cycle
501HT Control Panel
DET
R/A
PRIME
Wash Temperature
Digital Display
Prime Switch
In-cycle Light
Scrub
In-cycle Light
Final Rinse Temperature
Digital Display
ON/OFF
Power Switch
Scrub
Push button
Start Push button
1. Push the POWER switch up to the ON position. The switch illuminates, water enters the wash
compartment. The booster heater begins to heat the final rinse water then the wash tank heater
heats the wash tank water.
2. Wait 10 minutes for the booster to reach temperature. Then, run 2-3 empty cycles before inserting
your first rack of dishes.
3. Prescrap and load wares into the appropriate dishrack. Do not overload dishrack. Load wares in a
peg rack; load silverware in a single layer in a flat-bottom dishrack. Overloading dishrack will result
in poor washing results.
4. Open dishwasher door and slide dishrack into the machine. Load 1 dishrack per wash cycle.
5. Close the dishwasher door. Press and hold START button for 1 second.
The cycle light illuminates and the wash cycle begins.
NOTE:
Make sure the wash temperature is a minimum of 150°F/66°C for high temp models and a
minimum of 140°F/60°C for low temp models before beginning the wash cycle.
NOTE:
Opening the door stops the cycle. When the dishwasher door is closed the cycle resumes automatically.
The dishwasher cycle will reset to the beginning If the door is open for more than 5 second.
All 201, 401 Control Panels
ON
DET
I
START
POWER
O
R/A
PRIME
OFF / DRAIN
Prime Switch
In-cycle Light
Start
Push button
ON/OFF
Power Switch
14
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Operation
Normal Wash Cycle (continued)
6. Check the rinse cycle temperature gauge during the final rinse cycle to ensure
the final rinse temperature ranges between 180-195°F/82-91°C for high
temperature models.
NOTE:
Models 201 and Models 401, (prior to
S/N W10012006 for Model 401), have a
single temperature gauge to indicate the
wash and rinse water temperatures.
Model 201
Model 401HT
Beginning with
S/N W100120006 and above
Model 401
Prior to S/N W100120006
Model 401HT, beginning with S/N
W100120006, has two temperature
gauges. The right-hand gauge indicates
the wash water temperature and the left-
hand gauge indicates the final rinse water
temperature during the final rinse cycle.
Separate Wash & Rinse
Combination Wash / Rinse
Temperature Gauge
Temperature Gauges
W R
7. The green in-cycle light goes out completing the cycle. The final rinse water
is held for the next wash cycle.
8. Open the dishwasher door and remove the dishrack of clean wares.
9. Repeat steps 2-8 for additional cycles.
Scrub Mode (extended wash) - Model 501HT Only
The SCRUB (extended wash) cycle is ideal for pots, pans, and heavily soiled items.
1. Follow STEPS 1-5 of the Normal Wash Cycle.
2. Wait 10 seconds to allow detergent to enter into the dishwasher before pressing
the SCRUB push button.
3. Press the SCRUB push button. The light above the SCRUB button illuminates,
indicating that the dishwasher is in a continuous SCRUB (extended wash) mode.
4. Press the SCRUB push button again to take the dishwasher out of the SCRUB
(extended wash) mode. The light above the SCRUB button goes out; the green
light above the START switch will stay illuminated, indicating the dishwasher has
resumed the remainder of the wash cycle.
NOTE:
The dishwasher washes until the SCRUB push button is pressed a second time to stop the Scrub
Mode (extended wash). If the SCRUB push button is not pressed a second time, then the
Scrub Mode will operate for a maximum of 15 minutes and then resume the wash cycle.
Rinse Sentry Feature
High temperature dishwashers with built-in booster heaters are equipped with the
Rinse Sentry feature. This feature extends the wash cycle for a maximum of
5 minutes to ensure that the final rinse water temperature is a minimum of 180°F/82°C.
15
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Operation
Dishwasher Drain Operation
1. Push the dishwasher POWER switch up to the ON position.
2. The POWER switch illuminates and the machine fills with water.
3. Press and hold the green START button for 1 second. (Silver button for Model 501HT).
4. Release the START switch.
5. The dishwasher starts and the green cycle light illuminates.
6. Check the temperature gauge to confirm that it displays the correct incoming hot water
temperature. This may take several minutes for the wash tank to reach temperature.
7. When the dishwasher stops, push the POWER switch down to the OFF/DRAIN position.
8. The green cycle light illuminates as the dishwasher begins the drain cycle.
9. The green cycle light goes out when the machine has drained completely.
Note:
There is a 4 second delay after switching the machine off. The motor will start and stop 4 times
before the drain cycle is complete.
16
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Cleaning
Cleaning
The best preventative maintenance is keeping the dishwasher as clean as possible
during regular use. A regular cleaning schedule will increase the life of the
dishwasher and ensure the best results.
CAUTION:
Damage to the unit or improper operation may occur if components are not
flushed and cleaned on a regularly scheduled basis.
Daily-End of the Day
1. Push the POWER switch to the OFF/DRAIN position and close the door to drain the tank.
The green in-cycle light will illuminate indicating the machine is in the drain out cycle.
This will last 90 seconds.
2. After the green in-cycle light goes out, open the door and remove both the upper and lower
spray arms. Hold each spray arm, then remove the knurled retaining screw.
3. Remove and clean the scrap screen by rinsing with clean water. Do not strike the screen on
hard surfaces.
4. Inspect the sump and clean the pump intake screen
5. Clean the spray arms to remove any debris from spray nozzles by back-flushing with water.
Do not strike the spray arms against solid objects.
Check spray arm bearings.
Pump
Inspect the sump and clean
the pump intake screen.
intake
screen
17
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Cleaning
Cleaning
Daily-End of the Day (continued)
6. Reinstall the scrap screen.
7. Wipe the exterior of the dishwasher clean using a soft cloth and mild detergent.
8. Leave the dishwasher door open overnight to allow the inside to dry.
Clean Wash Nozzles and Bearings
18
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Cleaning
Cleaning
After Meal Period or Every 8 Hours
Clean the scrap screen after each meal period and more frequently if necessary in order
to keep the scrap screen from becoming clogged.
De-liming
Your dishwasher should be de-limed regularly. The frequency will depend on the
mineral content of your water.
Inspect your machine interior for lime deposits. If de-liming is required, a de-liming agent
can be used to remove the deposits.
DANGER:
DEATH or serious injury may result if Hazardous Gases are created when de-liming
solution mixes with household bleach (sodium hypochlorite) or any products containing
chlorine, iodine, bromine, or fluorine. Never mix de-liming solution with other chemicals.
Consult your chemical supplier for specific safety precautions.
CAUTION:
Chemical burns or severe skin irritation may result when handling de-liming solution.
Always wear protective clothing when handling de-liming solution.
Consult your chemical supplier for specific safety precautions.
Note:
Consult your local chemical supplier for the proper chemicals.
19
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Maintenance
Maintenance Schedule
The best maintenance you can perform is to keep your dishwasher clean.
Before and During Operation
-
-
Check the temperature gauges during operation to ensure the proper
temperatures are maintained.
Check the chemical supply container level and replenish if necessary.
Weekly Maintenance
1. Inspect all water lines for leaks.
2. Check drain for leaks.
3. Clean accumulated lime deposits from the heating element.
4. Inspect each spray arm for clogged nozzles.
5. Check the scrap screen for damage and cleanliness.
6. Clean the chemical supply tubing.
To Clean the Chemical Supply Tubing:
1.
2.
Remove pick-up tubes from each container and place them in containers of hot water.
Press and hold the PRIME switch in the “UP” position to flush the detergent tubing and in the
“DOWN” position to flush the rinse-aid tubing. (rinse-aid and sanitizer on LT Models).
3.
4.
Remove the pick-up tubes from the hot water and return them to their chemical containers.
Press and hold the PRIME switch in the “UP” position to fill the detergent tubing and in the
“DOWN” position to fill the rinse-aid tubing (rinse-aid and sanitizer on LT Models).
5.
Run a complete wash cycle to flush any chemicals out of the wash compartment.
ATTENTION
HIGH TEMPERATURE MACHINES ARE EQUIPPED WITH THE RINSE SENTRY FEATURE.
THE RINSE SENTRY WILL EXTEND THE WASH CYCLE IN THE EVENT THAT THE
BOOSTER HEATER HAS NOT REACHED A MINIMUM TEMPERATURE OF 180°F/82°C.
20
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Troubleshooting
Condition
Cause
Solution
Dishwasher will not run.
Door not closed.
Main power OFF.
Dishwasher OFF.
Close door completely.
Check breaker on panel.
Turn dishwasher ON.
Low or no water.
Main water supply off.
Solenoid valve defective.
Solenoid strainer clogged.
Flow washer defective.
Timer board defective.
Open supply valve.
Install repair kit or replace.
Clean strainer.
Replace flow washer.
Test/replace timer board.
Chemical supply low.
Supply tubing damaged.
Supply tubing kinked.
Pick-up tube clogged
Timer board defective.
Refill chemical container.
Replace tubing.
Chemicals won’t feed into
dishwasher.
Straighten tubing.
Clean/replace tube.
Test/replace timer board.
Low water pressure
pumped from spray arms.
Clogged scrap screen.
Clogged spray arms.
Clean scrap screen.
Clean spray arms.
Clogged pump intake
screen.
Clean sump and pump
intake screen.
Poor wash results.
Water temperature low.
Thermostat defective.
Raise incoming water
temperature.
Adjust/replace thermostat.
(See chemicals won’t feed
above.)
(See chemicals won’t feed
above.)
(See low or no water
above.)
(See low or no water
above.)
Detergent injector defective. Replace squeeze tube.
Replace injector motor.
Clean tubing and pick-up.
Wares incorrectly loaded.
in dishrack.
Reposition wares or reduce
amount of wares.
Water has drained out of
the wash tank while the
dishwasher was idle.
Goose-neck loop in drain
hose has been removed.
Re-route drain hose.
DO NOT STRETCH HOSE
Drain hose clamp is not
holding the drain hose
in proper position.
Replace/Adjust hose clamp
making sure goose-neck
is maintained.
Building plumbing does not Contact Service Agent
provide correct air vent
to prevent siphoning.
and/or plumber.
(HT models only)
dishwasher stays in
wash cycle.
Rinse Sentry extends
Raise incoming water
wash mode for a maximum temperature.
time of 5-minutes to allow
Adjust/replace final rinse
booster thermostat.
final rinse water booster
temperature to reach
180˚F/82˚C.
Turn Extended Wash Mode
off.
(501HT only) dishwasher is
in Extended Wash Mode.
21
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Blank Page
This Page
Intentionally
Left Blank
22
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Service Replacement Parts
Service Replacement Parts
Illustration
Pg.
Wash Pump/Motor Assy - All Models..........................................................
Wash Tank, Drain, Scrap Screens - All Models..........................................
Built-in Electric Booster (201HT, 401HT, 501HT) .......................................
Base Electrical Components - All Models...................................................
Fill Piping - All Models ................................................................................
Fill Valve Assy - All Models.........................................................................
Fill Chute Assy - All Models........................................................................
Sprayarm Assy - All Models........................................................................
Main Terminal Block, Timer Board - All Models ..........................................
Rinse-Aid/Sanitizer Chemical Dispensing Pump - All Models....................
Detergent Chemical Dispensing Pump - All Models...................................
Control Panel (201HT/HTN, 201LT, 401HT/HTN, 501HTN, 501LT)...........
Control Panel with Digital Display (501HT) ................................................
Door Assy - All Models................................................................................
Panel Assy - All Models..............................................................................
Dish Racks .................................................................................................
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
23
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Wash Pump/Motor Assy - All Models
12
10
11
13
9
7
8
5
4
3
6
2
24
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All Models - Wash Pump/Motor Assy
Item
No.
Part
No.
Description
Qty.
1
2
0512340
0512341
114144
SCREW, M4.0x0.70 30mm PHILIPS PAN HEAD
IMPELLER HOUSING COVER
NUT, M6 (left-hand threads)
WASHER, LOCK, 1/4"
WASHER, PLAIN, 17/64"
IMPELLER
9
1
1
1
1
1
1
1
1
9
1
1
1
3
4
0501501
0501478
0512345
114139
5
6
7
SEAL, PUMP
8
110285
GASKET
9
114137
PLATE, BACKING
10
11
12
13
107337
0512101
0513131
0512347
NUT, M4
PUMP ASSEMBLY COMPLETE, 115VAC/60/1
COVER, REAR MOTOR FAN
CAPACITOR, 40μF
25
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Wash Tank, Drain, Scrap Screens - All Models
Model 401 Only
2
P/N
Description
110750 Gasket
110855 Plug 1/4" Plastic
110856 Nut 1/4" Plastic
Qty
2
2
18
Item 4 not used
on Model 401
2
4
3
26
25
29
Model 401 Only
24
P/N
Description
Qty
109034 Gasket
108418 Plug 1/2" Plastic
108417 Nut 1/2" Plastic
1
1
1
5
22
23 28
Item 6 & 26
not used on
Model 401
29
26
6
20
7
21
8
9
11
10
19
12
13
14
17
16
15
26
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All Models - Wash Tank, Drain, Scrap Screens
Item
No.
Part
No.
Description
Qty.
1
0509302
0712136
0512107
0512169
94” DRAIN HOSE - 5/8” ID X 1” OD N/S
SCREEN, SCRAP ASSY
1
1
1
2
3
4
THERMOMETER, 7 FT. CAPILLARY (Except 501HT)
HEATER, 120VAC 750W
(For Low Temp.120VAC Models Only)
(201HTN, 201LT, 401HTN 501HTN, 501LT)
1
1
----
----
0512168
0512426
HEATER, 230VAC 1200W (201HT, 501HT)
Prior to S/N 14326
HEATER, 240VAC 2000W (201HT, 501HT)
1
Beginning with S/N 14326 and above (for all except 501HT)
Beginning with S/N 14191 and above for 501HT
5
D540088
0507323
D80208
D500603
D80305
108447
FLANGE, PUMP SUCTION
THERMOSTAT, WASH TANK (Not used on Model 401)
GASKET, PUMP SUCTION
ELBOW, PUMP SUCTION
1
1
1
1
1
1
2
4
4
1
1
1
1
2
1
2
1
1
1
1
1
2
1
2
2
2
6
7
8
9
GASKET, ELBOW
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CAP, 1 1/4 PLASTIC
0512322
0501501
100003
CLAMP, HOSE 1-13/16 - 2-3/4 MAX S/S
WASHER, SPLIT LOCK 1/4i 304SS
NUT, HEX SS 1/4-20
0503718
0501411
0501379
0312096
112612
FOOT, ADJUSTING
SCREW, 10-32 X 1/4 RH SLOT SS
SWITCH, 15A
BRACKET, DOOR SWITCH
THERMISTOR, 10k 2 WIRE ASSY (501HT Only)
BRACKET, WASH PUMP
0312144
0502571
0512118
0512119
113604
CLAMP, HOSE GEAR HOSE 1-1/2” SS
HOSE, PUMP SUCTION
HOSE, PUMP DISCHARGE
THERMOSTAT, HIGH LIMIT
ADAPTOR, THERMOMETER
ADAPTOR, THERMISTOR (501HT ONLY)
NUT, LOCK 1/2 INCH NI PLATED
ADAPTOR, THERMOSTAT (NOT SHOWN)
4-40 X 5/8” SCREW
0508872
0512299
201029
25
26
27
28
29
0508873
0508752
108954
6-32 LOCK NUT N/S
0501836
O-RING, ADAPTER
27
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Built-in Electric Booster (201HT, 401HT, 501HT)
401 HT Only
15
14
22
14
14
13
12
15
23
11
24
10
21
1
8
2
3
15
4
14
5
16
6
7
17
18
14
13
19
12
20
15
28
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Built-in Electric Booster (201HT, 401HT, 501HT)
Item
No.
Part
No.
Description
Qty.
1
2
3
4
0509042
0512185
0508817
109985
BOOSTER TANK
1
2
1
1
BOLT, HEX FLANGE 1/4-20 X 3/8 SS
PLUG, 1/8 HEX COUNTERSUNK
SEAL, ELECTRIC HEATER FLANGE
5
111235
111233
HEATER 5/6.6KW 208/240V
1
1
HEATER 7.5/10KW 208-240 (70 DEGREE RISE)
6
7
8
H161123
100003
109069
COVER,HEATING ELEMENT
NUT, HEX SS 1/4-20
1
6
1
THERMOSTAT, BOOSTER
(Prior to S/N W14478)
---
0512108
THERMOSTAT, BOOSTER
(Beginning with S/N W14478 and above)
(Order Item 21 with this thermostat)
1
9
0501501
108954
110562
WASHER, SPLIT LOCK 1/4i 304SS (NOT SHOWN)
NUT, GRIP 6X32 NYLON INSERT SS
THERMOSTAT, HIGH LIMIT
3
2
1
2
2
8
10
11
12
13
14
15
16
17
18
0508840
0502653
0503679
107417
0512297
102525
100184
BUSHING, 3/4MPT X 3/8FPT BRASS
ELBOW, 90 DEGR 3/8MPTX1/2 HOSE
CLAMP, SS GEAR-MIN. 5/16-MAX.7/8
HOSE, RUBBER 1/2ID X .84OD
9FT
COUPLER, 1/2 HOSE X 3/4 NPT (501 HT ONLY)
TEE (501 HT ONLY)
1
1
1
NIPPLE 3/4 NPT (501 HT ONLY)
19
0512298
BUSHING REDUCING 1/8” NPT X 1/2” NPT
(501 HT ONLY)
1
20
21
112612
THERMISTOR (501HT ONLY)
1
1
0512425
ADAPTER, THERMOSTAT
(Must be ordered with P/N 0512108 Thermostat)
22
23
24
0512857
0512941
0512107
TEE, RINSE THERMOMETER (401HT ONLY)
FITTING, BOOSTER THERMOMETER (401HT ONLY)
THERMOMETER, 2” DIAL (401HT ONLY)
1
1
1
29
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Base Electrical Components - All Models
For Booster Heater
(Beginning with
S/N 14236 and above)
1
2
5
For Wash Tank Heater
(All S/N’s)
RINSE
9
BOOSTER FIL
SWITCH
-
L
+
3
F
I
L
O
F
F
W
ASH
-
O
N
-
L
For Booster Heater
(Prior to S/N 14236)
8
1
7
201HT, 401HT, 501HT
4
5
6
4
2
For Wash Tank Heater
(All S/N’s)
201LT, 501LT
8
10
30
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All Models - Base Electrical Components
Item
No.
Part
No.
Description
Qty.
1*
0512108
THERMOSTAT, BOOSTER
(Beginning with S/N W14236 and above)
1
(501HT, 401HT, 201HT)
1
109069
THERMOSTAT, BOOSTER
(Prior to S/N W14236)
1
(501HT, 401HT, 201HT)
2
3
4
5
0507323
0501373
100007
112518
THERMOSTAT, WASH TANK
(All S/N's)
(501HT, 401HT, 201HT)
1
1
4
1
SWITCH, 3-POSITION TOGGLE
(501HT, 401HT, 201HT)
SCREW, TRUSS SLOT SS 10-32 X 3/8
CONTACTOR, 2-POLE 120V
(Prior to S/N W14236)
(501HT, 401HT, 201HT)
5
0512432
CONTACTOR, 3-POLE 120V
(Beginning with to S/N W14236 and above)
(501HT, 401HT, 201HT)
1
6
0312173-1
BRACKET, CHEMICAL PUMP, THERMOSTAT
(501HT, 401HT, 201HT)
1
7
8
9
0504822
0501450
0512444
SCREW, 8-32 X 1/2 PAN HD PH SST
SCREW, NIBS RH 6-32 X 3/16 PHIL.SS
8
4
1
LABEL, RINSE-WASH, BSTR. FILL
(501HT, 401HT, 201HT)
10
0312173-3
BRACKET, CHEMICAL PUMP, THERMOSTAT
(501LT, 201LT)
1
* P/N 109069 can be used an alternative replacement part beginning with S/N W14478
31
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Fill Piping - All Models
32
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All Models - Fill Piping
Item
No.
Part
No.
Description
Qty.
1
2
3
4
5
6
7
8
9
0502653
0512185
0300065
0300203
0502618
0503679
0509526
0505320
0504952
ELBOW, 90 DEGR 3/8MPTX1/2 HOSE
BOLT, HEX FLANGE 1/4-20 X 3/8 SS
SUPPORT, VALVE
1
4
1
1
1
1
1
1
CLAMP, VALVE
HOSE BARB, 1/2 X 3/8 MPT
CLAMP, SS GEAR-MIN. 5/16-MAX.7/8
HOSE, 1/2 X 7FT FEM.GARD.ADAPT.
WASHER, 1” O.D. GARDEN HOSE
VALVE, FILL 5.0 GPM (Breakdown on next page)
1
33
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Fill Valve Assy - All Models
9
8
7
6
5
34
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All Models - Fill Valve Assy.
Item
No.
Part
No.
Description
Qty.
1
2
3
4
5
6
7
8
9
0504952
0502803
0502804
0504958
0502807
0502811
0505229
0501406
0505235
SOLENOID VALVE, COMPLETE (5.0 GPM)
STRAINER SCREEN, SOLENOID VALVE
WASHER, SEAL
1
1
1
1
1
1
1
3
1
WASHER, FLOW 5.0 GPM
GASKET
KIT, REBUILD
GUIDE
SCREW, SLOT SS RH 8-32 X 1/2
COIL, 115V 60HZ 10W
35
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Fill Chute Assy - All Models
1
FROM TOP OF BOOSTER
OR FILL VALVE
8
9
FROM DETERGENT PUMP
7
FROM RINSE-AID AND
SANITIZER PUMPS
6
2
5
3
4
36
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All Models - Fill Chute Assy.
Item
No.
Part
No.
Description
Qty.
1
2
3
4
5
106090
TIE PLATE
2
1
1
4
6
0509048
0508867
0507709
0503722
GASKET, INLET CHUTE
CHUTE, INLET INJ.MOLDED
WASHER, FLAT #10 SS
NUT, HEX 10-32 SS
6
7
0502666
0502667
HOSE, 1/8ID X 1/4OD PVC
8 ft.
8 ft.
(RINSE AID AND SANITIZER PUMP)
HOSE, 1/4ID X 3/8OD PVC
(DETERGENT PUMP)
8
9
107417
HOSE, RUBBER 1/2ID X .84OD
CLIP, HOSE
5 ft.
1
0308822
37
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Sprayarm Assy. - All Models
25
24
26
8
23
8
23
22
21
10
11
12
13
14
15
20
11
12
13
19
18
14
15
17
17
16
16
38
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All Models - Sprayarm Assy.
Item
No.
Part
No.
Description
Qty.
1
0501478
WASHER, 17/64IDX9/16 OD18G SS
NUT, HEX SS 1/4-20 NYLON INSERT
HUB,UPPER WASH ARM
WASHER, PACKING
4
4
1
1
1
2
1
2
2
2
107967
3
H35509
107873
4
5
110215
SCREW, RETAINING
6
0502571
0512120
0712749
0512129
0512133
100194
CLAMP,HOSE GEAR HOSE 1-1/2” SS
HOSE, UPPER WASH ARM,
ASSY., BEARING
7
8*
9
NUT, WASH ARM
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
O RING, 2 1/8 OD X 1 3/4 ID X 3/16 #327 SILICONE
NUT, GRIP 10-32
2
1
1
1
2
1
2
1
1
1
1
1
1
2
4
4
1
0512104
0512126
0512130
0512128
104883
FLAP, DRAIN
SPRING, TORSION
O RING #106
SHAFT, DRAIN FLAP
SCREW 6-32 X 3/8 RD HD SS-SLOT
MOTOR, DRAIN 115V
0712123
0512127
100007
GASKET, DRAIN
SCREW TRUSS SLOT SS 10-32 X 3/8
MANIFOLD, LOWER F&D
HUB, LOWER WASHARM
SHAFT, LOWER F&D
0512103
0512066
0512125
H420548
100738
WASH ARM, (Includes item 8)
BOLT, 1/4 X 1, SS HEX HEAD
WASHER, NYLTITE
0501481
0512133
O RING, 2 1/8 OD X 1 3/4 ID X 3/16 #327 SILICONE
---
0712367
DRAIN MANIFOLD ASSY COMPLETE
(Includes items11-19)
1
* Note:
The bearing assembly, P/N 0712749, includes 2 bearings, 1 locknut, and 1 wash arm hub.
The individual parts are no longer available as separate replacement parts.
39
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Main Terminal Block, Timer Board - All Models
2
1
3
4
9
5
8
Try replacing the
4 Amp fuse before
7
6
replacing the circuit bd.
10
4
20
11
12
13
19
14
18
15
16
17
40
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All Models - Main Terminal Block, Timer Board
Item
No.
Part
No.
Description
Qty.
1
107964
BUSHING, SNAP (ALL)
3
1
6
3
1
1
1
1
6
1
2
1
1
1
1
1
2
2
2
0312188
0508710
0501411
0312189
0512243
0712105
0512373
100764
BASE, TIMER ENCLOSURE
SPACER, 5/16
3
4
SCREW, 10-32 X 1/4 RH SLOT SS
COVER, TIMER ENCLOSURE
LABEL, ADJUSTMENT
5
6
7
TIMER CKT BD. SOLID STATE
FUSE, 4A 250VAC,
8
9
SCREW, 6-32 X 1/2 ROUND HD PHI
BUSHING, STRAIN RELIEF
NUT, BRASS 10-32
10
11
12
13
14
15
16
17
18
19
0503647
0501533
0501472
0501493
0312338
0501403
0503592
100007
WASHER, FLAT 1/8 X 1/2 BRASS
WASHER LOCK #10 EXT. TOOTH, BRASS
BASE, ENCLOSURE, ELEC. CONN
SCREW, BRASS RH 10-32X3/4 SLOT
LABEL, GROUND
SCREW TRUSS SLOT SS 10-32 X 3/8
SCREW, 10-32 X 1/4", TRUSS HD.
100213
0504951
BLOCK, TERMINAL, 3-POLE
(Prior to S/N W14236)
501HT, 401HT, 201HT Only
1
---
0509527
0312339
BLOCK, TERMINAL, 4-POLE
(Beginning with S/N W14236 and above)
501HT, 401HT, 201HT Only
1
1
20
COVER, ENCLOSURE, ELEC. CONN
41
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Rinse-aid/Sanitizer Chemical Dispensing Pump - All Models
10
To Injection
Point
11
42
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All Models - Rinse-aid/Sanitizer Chemical Dispensing Pump
Item
No.
Part
No.
Description
Qty.
1
2
0503756
0706635
0707142
0501519
0505483
0503694
0306363
0501869
0504822
0506589
0502666
112759
MOTOR, INJECTOR PUMP
TUBE, ELEMENT ASSEMBLY 45CC
ROTOR, ASSEMBLY
1
1
1
4
1
1
1
1
1
2
3
4
TIE, NYLON 4"
5
LABEL, RINSE AID
----
6
LABEL, SANITIZER
TUBE,1/2 ID X11-7/8 LG. STIFFENER
STRAINER
7
8
SCREW, 8-32 X 1/2 PAN HD PH S.S
SCREW, PAN 6-32 X 7/8 SS PHILLIP
HOSE, 1/8 ID X 1/4OD
9
10
11
A/R
TUBE, PUMP 1/8" ID X 2" LG.
1
43
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Detergent Chemical Dispensing Pump - All Models
2
1
Yellow Rollers
Check the squeeze tube every
six months for wear.
3
4
5
6
5
6
5
5
7
7
8
9
10
44
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All Models - Detergent Chemical Dispensing Pump
Item
No.
Part
No.
Description
Qty.
1
2
3
4
5
6
7
8
9
10
0510870-1
114203
GEARMOTOR,108 RPM, 115/60/1
PUMP HD KIT, PERISTALIC
TUBE ASY,SANTOPRENE,1/4IDX8.25
CLAMP, HOSE
1
1
1
2
4
1
114202
0512369
0501519
0502644
0502667
0503695
0306363
0501869
TIE, NYLON 4"
ELBOW, 1/4 HOSE BARB
HOSE, 1/4ID X 3/8OD
A/R
LABEL, DETERGENT
1
1
1
TUBE,1/2IDX11-7/8LG. STIFFENER
STRAINER
45
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Control Panel - (201HT/HTN, 201LT, 401HT/HTN, 501LT)
9
6
6A
4
3B
3
3A
2
1
7
401HT ONLY
10
W
ASH
RINSE
5
401HT ONLY
5A
46
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(201HT/HTN, 201LT, 401HT/HTN, 501LT) - Control Panel
Item
No.
Part
No.
Description
Qty.
1
0512220
0512221
0512232
SWITCH, ROCKER DPDT, 120VAC, (201HTN,
201LT, 401HTN, 501LT, 501HTN
1
1
1
1
1
SWITCH, ROCKER DPDT, 250VAC
(201HT, 401HT )
2
LIGHT, INDICATOR, GREEN LED, 2VDC, (All Models)
3
0512218
0512217
0512216
PUSHBUTTON,GREEN
HOUSING, SWITCH
1
1
1
3A
3B
CONTACT, MOMENTARY, N.O.
4
0512226
0512107
0512107
SWITCH, ROCKER, ROUND, SPDT, MOMENTARY
THERMOMETER
1
1
1
5
5A
THERMOMETER (401HT ONLY)
(Rinse thermometer Beginning with S/N W100120006 and above)
6
0512115
0512329
0501408
0312183
0503580
0512355
LABEL, (201HT/HTN, 401HT/HTN)
LABEL, (201LT, 501LT)
1
1
4
1
4
1
6A
7
SCREW, TRUSS, SLOT 8-32 X 1/4
PANEL, CONTROL, FRONT
8
9
NUT, 10-32 KEPS
10
LABEL, WASH/RINSE THERMOMETER (401HT ONLY)
(Beginning with S/N W100120006 and above)
47
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Control Panel with Digital Display - (501HT, 501HTN)
10
11
8
9
7
10
12
8
13
6
5
4
3
2
1
5
48
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(501HT, 501HTN) - Control Panel with Digital Display
Item
No.
Part
No.
Description
Qty.
1
0512221
0512220
0512232
0512213
0512226
0501408
0512113
0512357
0503580
0512106
0501563
0312371
0501412
0312181
SWITCH, ROCKER DPDT, 250V NEON (501HT)
SWITCH, ROCKER DPDT, 120V NEON (501HTN)
LIGHT, INDICATOR, GREEN LED, 2VDC
SWITCH, PIEZO
1
---
2
2
2
1
2
1
2
4
1
4
1
4
1
3
4
SWITCH, ROCKER, ROUND, SPDT, MOMENTARY
SCREW, TRUSS, SLOT SS 8-32 X 1/4
LABEL
5
6
7
SPACER, DIGITAL DISPLAY BOARD
NUT, 10-32, KEPS
8
9
TEMPERATURE DISPLAY BOARD, DIGITAL
SCREW, #8 X 3/8
10
11
12
13
PANEL, REAR
SCREW, 10-32 X 3/8
PANEL, CONTROL CABINET
NS
NS
0512362
0512223
HARNESS, DIGITAL DISPLAY BOARD
HARNESS, CONTROL PANEL
1
1
49
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Door Assembly - All Models
1
2
9
10
9
8
3
7
4
5
6
50
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All Models - Door Assembly
Item
No.
Part
No.
Description
Qty.
1
0312171
0312172
0501408
0712164
0712162-1
106026
HANDLE, DOOR
1
HANDLE, DOOR, 501HT ONLY
2
SCREW, TRUSS SLOT SS 8-32" X 1/4"
DOOR WELDED ASSY
2
1
1
1
1
2
1
2
1
3
4
HINGE, RH ASSY
5
WASHER, SS 9/32" X 5/8" OD
BOLT, HEX SS 1/4-20 X 1"
SPRING, DOOR
6
0501422
0512122
0712162
0512320
0512319
7
8
HINGE, LH ASSY
9
GASKET, STEAM
10
GASKET, TOP DOOR, 1/8" X 5/8" X 21-1/2" LG.
51
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Panel Assembly - All Models
6
10
9
8
11
6
13
12
7
14
6
4
6
5
4
3
2
Prior to S/N W100120006
16
3
1
15
Beginning with
S/N W100120006
and above
52
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All Models - Panel Assembly
Item
No.
Part
No.
Description
Qty.
1
0312193
PANEL, FRONT (201HT/HTN, 201LT, 501LT)
1
1
---
0312193
PANEL, FRONT (401HT)
(Prior to S/N W100120006)
2
0312372
PANEL, FRONT (501HT, 501HTN)
1
3
100779
SCREW 1/4-20X5/8 TRUSS SS PHIL
PLUG, HOLE 3/4"
2
4
108826
2
5
0312174
100007
PANEL, RH SIDE
1
6
SCREW TRUSS SLOT SS 10-32X3/8
PANEL, BACK
2
7
0312191
0312212
0501478
100003
1
8
HOOD, MOYER DIEBEL
WASHER, 17/64IDX9/16 OD18G SS
NUT, HEX SS 1/4-20
PANEL, LH SIDE
1
9
4
10
11
12
13
14
4
0312175
0512157
0512758
0512369
1
CONDUIT, 1/2”
AR
A/R
3
CONDUIT, 3/8”
CLAMP
15
16
0312981
0512355
PANEL, FRONT (401HT)
1
1
(Beginning with S/N W100120006 and above)
LABEL, WASH/RINSE THERMOMETER
(Beginning with S/N W100120006 and above)
53
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Dish Racks
1
2
Item
No.
Part
Description
Qty.
No.
1
101273
DISH RACK, FLAT-BOTTOM
DISH RACK, PEG
A/R
A/R
2
101285
54
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Electrical Schematics
Electrical Schematics
Illustration
Pg.
Low Temp. 201LT, 501LT (All S/N’s)...............................................................
High Temp. 201HTN, 401HTN, 501HTN (All S/N’s) .........................................
High Temp. 201HT, 401HT, 501HT (Prior to S/N 14236) ..................................
High Temp. 201HT, 401HT, 501HT (Beginning with S/N 14236 above)................
High Temp. 501HT (Prior to S/N 14236).........................................................
High Temp. 501HT (Beginning with S/N 14236 above).........................................
Timer Chart - All Models.............................................................................
56
57
58
59
60
61
62
55
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Low Temp. - 201LT, 501LT - All S/N’s
Low Temperature Undercounter - All S/N’s
56
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High Temp.- All S/N’s - 201HTN, 401HTN, 501HTN
All S/N’s
201HTN, 401HTN, 501HTN
High Temperature Dishwasher w/o Built-in Booster
57
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High Temp. - 201HT, 401HT - Prior to S/N 14236
Prior to S/N 14236
201HT, 401HT
High Temp w/ built-in boosters
58
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Beginning with S/N 14236 - 201HT, 401HT - High Temp.
Beginning with S/N W14236 and above
201HT, 401HT High Temperature Dishwasher
with built-in booster.
59
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High Temp. - 501HT - Prior to S/N 14236
TO CUSTOMERS DISCONNECT SWITCH
PER LOCAL ELECTRICAL CODES
SINGLE PHASE
115-208/230V 60HZ
THREE PHASE
208/230V+115V NEUTRAL 60HZ
L1
L2
N
L1
L2
L3
N
GND
GND
PS
BFS
1
1L1
L1
POL
TT
10
TS
1L2
L2
4
5
3
WHTR
1L1
7
1
115 V
4
3
2
1
NEUTRAL
HC1
HC1
1H2
1H1
CPS
1
8
10
9
N
CB
115 V
1HTR
1HTR
BOOSTER HEAT
208/230 VAC
5 kW
BOOSTER HEAT
208/230 VAC
5 kW
11
12
8
WP
WASH PUMP
DP
RAP
DEP
FRV
DVO
DRAIN PUMP (not on 501HT)
R/A
9
7
DETERGENT
FILL/RINSE
13
14
2
DRAIN VALVE OPEN
DVC
DRAIN VALVE CLOSED
1
RTS
WTS
DP
RINSE TEMPERTURE SENSOR
WASH TEMPERTURE SENSOR
DRAIN PUMP
15
17
16
CB
CIRCUIT BOARD
EWL
BFS
DVO
DVC
DSS
FRV
GND
POL
DEP
HC1
1HTR
CL
BOOSTER FILL SWITCH
DRAIN VALVE OPEN
DRAIN VALVE CLOSED
DOOR SAFETY SWITCH
FILL/RINSE VALVE
GROUND
CL
8
4
7
3
6
2
5
1
POWER ON LIGHT
DETERGENT PUMP
BOOSTER CONTACTOR
BOOSTER HEATER
CYCLE LIGHT
19
20
SS
EWS
18
15
WP
WASH PUMP
SS
START SWITCH
CPS
PS
RAP
TT
TS
BT
BS
EWS
SP
CHEMICAL PRIME SWITCH
POWER ON SWITCH
RINSE AID PUMP
DSS
LOW VOLTAGE SECTION
2 AND 5 VDC
TANK HEAT THERMOSTAT
TANK HEAT SAFETY THERMOSTAT
BOOSTER THERMOSTAT
BOOSTER SAFETY THERMOSTAT
EXTENDED WASH SWITCH
SANITIZER PUMP
10
BT
22
N
WHTR
EWL
WASH TANK HEATER
EXTENDED WASH LIGHT
BS
1
21
HC1
DIAGRAM STATE
Prior to S/N 14236
501HT High Temperature Digital Display
NUMBER/REV
0512092 REV 3
DATE
26-FEB-07
END OF CYCLE
POWER-OFF
DOOR-OPEN
60
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Beginning with S/N 14236 - 501HT - High Temp.
Beginning with S/N 14236 and above
501HT High Temperature Digital Display Undercounter
61
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Timer Chart - All Models
62
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Basic Service
Basic Service
Illustration
Pg.
Digital Temperature Display Board (501HT Only) ......................................
Digital Temperature Display Codes (501HT Only)......................................
Timer Board Selector Switch (All Models)..................................................
Timer Board Troubleshooting Guide (All Models).......................................
Timer Board Diagnostic Testing (S/N W081217467 and above)................
64
65
66
67
68
63
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Digiital Temperature Display Board - 501HT
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Digiital Temperature Display Board - 501HT
p/n 0512106 Digital temperature Display coDes
Display coDe
cause
Wash Display
Wash temperature is below 100°F
Wash temperature is above 180°F
Wash tank has no water and heater is on
Bad booster thermistor
Open or broken wire between thermistor and
board
Loose connection
Wash tank has no water and is extremely hot
rinse Display
Booster temperature is below 100°F
Rinse temperature is above 200°F
Booster tank has no water and heater is on
Bad booster thermistor
Broken wire between thermistor and board
Loose connection
Booster tank is dry and extremely hot
Wash and rinse Display
Thermistor quick disconnect plug on back of
board is disconnected
Booster tank and wash tank are both dry
Broken wires on thermistor harness, or both
thermistors are unplugged or defective
Booster and wash tank temperature below
100°F
Booster temperature above 200°F and
wash tank temperature above 180°F
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Timer Connection Diagram - All Models
S • C R U B L I g
C • Y C L E L I g
S • C R U B S w
S T w I A T R C H S • T
A T g E P L U g L O w v O L
v E A C L L O S E D D R A I N v
v E A O L P E N D R A I N v
v E A L v
A I D
F I L L
O U T P U T
D E T E R g O E U N T T P U T
R I N S E O U T P U T
S A N I T I z O E R U T P U T
F U S E
C O N A T M 4 R P O L
O R O U T P A U S T w H M O
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All Models - Timer Board Troubleshooting
Troubleshooting Guide
Troubleshooting Timer Board P/N 0712105
June 2010
8
7
6
1
5
4
9
3
2
Test/Condition
Indication/Cause
Recomendation/Solution
1. Run LED is lit
Board has power
Machine is powered up and Run LED
is not lit
Possible bad start switch, scrub switch
or wiring short (does not apply to S.S.
Pizio switch on model 501 or UH200)
Unplug low voltage plug. If Run LED lights up:
The start switch or scrub switch failed in the closed
position, or there is a wiring short
Machine is powered up and Run LED
is not lit after unplugging the low
voltage plug
Check voltage
2. Wash pump runs but nothing else works
4 amp board output fuse is blown
Replace the 4 amp fuse. Check for wiring problem
15
3. Check continuity of the start switch
Use plug pin #8, wire #15 as common to plug pin # 1,
wire #20 (see Fig.1)
17
EWL
16
CL
Check continuity of the scrub switch
Check continuity of the cycle light
Check continuity of the scrub light
Check continuity of door safety switch
Use plug pin #8, wire #15 as common to plug pin # 3,
wire #19 (see Fig.1)
8
4
7
3
6
2
5
1
Use a meter with diode setting - to cycle light, plug
pin # 6, wire #16 and common pin # 8, wire # 15
19
20
SS
EWS
18
15
Use a meter with diode setting - to scrub light, plug
pin # 7, wire #17 and common pin # 8, wire # 15
DSS
LOW VOLTAGE SECTION
2 AND 5 VDC
Use a meter with diode setting - to door safety switch,
plug pin # 4, wire #18 and common pin # 8, wire # 15
Fig. 1
4. Fill LED is lit
Indicates output voltage to fill valve
5. Select the appropriate setting on the
dipswitch for the model of machine
the solid state timer will be installed in
Set dipswitch to FWR for model UH170 and UH200
Set dipswitch to F&D for model 201, 401, 501, UH100
Note: This solid state timer board is used for
several different models
6. Use the skip switch to force the timer
Eg: Pressing the skip switch immediately after starting
the cycle will make the machine skip the wash cycle,
and go straight into the drain cycle
to the next segment of the cycle
7. Use the reset button to reset the solid
The reset button will reboot the solid state timer
board (much like rebooting your computer)
state timer board
8. 0.063 amp internal board supply fuse
Replace the solid state timer board
Replace the board
is blown
9. Wash motor LED is lit
Indicates output voltage to the wash motor during
wash/rinse cycle only. LED is not lit during soft start
Wash motor LED is not lit, but wash
motor runs continuously
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Timer Board Diagnostic Testing
diagnostic testing for p/n 0712105 solid state timer board
- effective serial # W081217467 and up
before testing, turn the power switch OFF and allow the machine to complete the
1
drain cycle.
check incoming voltages
Open the door
2
If the green cycle indicator light blinks, the dOOr sWItch and cyclE lIght work
Note: this function times out after 10 seconds
close the door
indicator light
Press and release the start sWItch
3
4
POWER
PRIME
SC
START
If the green cycle indicator light flashes the start switch works
indicator light
Press and release the scrub/Ext Wash switch if equipped
POWER
START
PR
SCRUB
If the green indicator light for the scrub switch flashes, the
scrub/ext wash switch works
to test the timer board and the following components, press
5
POWER
and release the start switch 3 times with the door closed
PRIME
SC
START
If the components listed below are operating properly, they
PrEss start
3 tImEs
should run consecutively for a few seconds each
• fill valve
• detergent pump
• rinse-aid pump
• drain valve opens
• drain valve closes
• wash pump
• drain pump or sanitizer pump (if applicable)
If one or more components do not run, see below
cONdItION
POssIblE causE/sOlutION
One of the components in step 5 does not run
check the component that did not run
the wash pump is the only component that runs
check the 4 amp fuse on the timer board
the wash pump is the only component that will
not run and the 4 amp fuse is good
check pump motor/see troubleshooting guide
None of the components run in step 5
check neutral wire/see troubleshooting guide
0512979
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