Friedrich Clothes Dryer CP14N10 User Manual

Service & Parts Manual  
2007  
Compact Programmable  
Models  
CP14N10  
CP18N30  
CP24N30  
CP-14-18-24-Svc-Prts-07 (3-07)  
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Specications and Technical Parameters  
Model  
CP14N10  
CP18N30  
CP24N30  
COOLING  
230/208V~  
60Hz  
Function  
COOLING  
COOLING  
Rated Voltage  
115V ~  
230/208V~  
Rated Frequency  
Total Capacity (Btu/h)  
Power Input (W)  
Rated Input (W)  
60Hz  
60Hz  
14000  
18000/17600  
23500/23100  
2740/2710  
3538  
1430  
1850/1810  
1540  
2478  
Rated Current (A)  
Air Flow Volume (CFM) (H)  
Dehumidifying Volume (pints/h)  
EER / C.O.P BTU/W.H)  
Energy Class  
15  
12.57  
18.09  
458.8  
458.8  
617.6  
3.38  
4.65  
8.46  
9.8  
9.7/9.7  
8.6/8.5  
/
Centrifugal ow fan – 1  
φ7.93 X 4.31  
Aluminum n-copper tube  
φ0.276  
/
Centrifugal ow fan – 1  
φ7.93 X 4.31  
Aluminum n-copper tube  
φ0.276  
/
Fan Type-Piece  
Centrifugal ow fan – 1  
φ8.82 X 4.31  
Aluminum n-copper tube  
φ0.276  
Diameter-Length (inch)  
Evaporator  
Indoor Side  
Pipe Diameter (inch)  
Coil length (l) x height (H) x coil width (L)  
Compressor Type  
16.61 X 15 X 1  
ROTARY  
16.61 X 15 X 1  
ROTARY  
16.61 X 15 X 1  
ROTARY  
L.R.A. (A)  
58  
42  
56  
Compressor RLA(A)  
Compressor Power Input(W)  
Overload Protector  
Working Temp Range (ºF)  
Condenser  
10.9  
7.45  
11.7/11.0  
1182  
1700  
2425/2480  
Built in  
Outdoor Side  
MRA13425-12007  
50º-115º  
MRA98982-9200  
50º-115º  
50º-115º  
Aluminum n-copper tube  
Axial fan –1  
φ15.59  
Aluminum n-copper tube  
Axial fan –1  
φ15.59  
Aluminum n-copper tube  
Axial fan –1  
φ15.59  
Fan Type-Piece  
Fan Diameter (inch)  
Fan Motor Speed (rpm) (H/M/L)  
900/780/730  
200  
900/780/730  
200  
1000/900/800  
190  
Output of Fan Motor (W)  
Fan Motor RLA(A)  
3
1.45  
1.35  
Fan Motor Capacitor (uF)  
15 MFD  
7 MFD  
7 MFD  
Permissible Excessive Operating Pressure for the Discharge Side (Psig)  
Permissible Excessive Operating Pressure for the Suction Side (Psig)  
Dimension (H/W/D)( inch)  
300  
300  
300  
150  
150  
150  
16.85 x 25.98 x 28.46  
19.96 x 31.1 x 29.13  
150/163  
16.85 x 25.98 x 28.46  
19.96 x 31.1 x 29.13  
150/163  
16.85 x 25.98 x 29.29  
19.69 x 29.29 x 36.22  
165/183  
Dimension of Package (H/W/D)( inch)  
Net Weight /Gross Weight (Pounds)  
Refrigerant Charge (Ounce)  
R22/26.46  
R22/27.87  
R22/33.51  
Performance Data  
EVAP. AIR TEMP.  
OPERATING  
PRESSURES  
BREAKER  
FUSE  
ELECTRICAL RATINGS  
R-22 REF.  
CONDENSER  
TEMPERATURE  
DEG. F  
DEG. F  
PERFORMANCE  
DATA* Cooling  
Discharge Suction Super  
Sub-Cooling  
Voltage  
Temp  
Temp Heat  
Discharge Temp.  
Amps  
Cool  
Amps  
Heat Rotor Amps  
Locked Charge in  
60 Hertz  
Amps  
Suction Discharge  
Air  
Drop F.  
OZ.  
CP14N10  
CP18N30  
59  
58  
57  
57  
56  
21  
22  
23  
23  
24  
118  
119  
119  
117  
117  
173  
173  
172  
197  
195  
56  
66  
66  
60  
57  
41  
52  
52  
44  
44  
54  
55  
55  
50  
50  
78  
77  
77  
75  
75  
267  
269  
269  
264  
264  
12.1  
8.3  
/
/
/
/
/
58  
26.5  
115  
230  
208  
230  
208  
15  
15  
38.9/42.4  
27.9  
33.5  
8.5  
12.3  
13.1  
CP24N30  
56A(230V)  
20  
*Rating Conditions:  
80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity.  
3
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Outer Component Identication  
Models: CP14N10, CP18N30, CP24N30  
Cabinet  
Air inlet louver  
Front grille  
Front intake grille  
Air filter  
(behind front intake grille)  
Power cord  
Control panel cover  
4
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Installation Dimensions  
Models: CP14N10, CP18N30, CP24N30  
(Top View)  
Fence / obstruction  
Over 2'  
Over  
1'  
Over  
1'  
Wall Or window  
(Front View)  
(Side View)  
Ceiling  
Over 1'  
Over 1'  
25.98"  
16.85"  
Over 2'  
Less than  
8.66"  
5
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Wiring Diagrams  
CP24N30  
CP18N30 / CP14N10  
6
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Functional Component Denitions  
MECHANICAL COMPONENTS  
HERMETIC COMPONENTS  
Vent door Allows introduction of fresh air into the room and/or  
Compressor Motorized device used to compress refrigerant  
exhausts stale room air outside (on select models.)  
through the sealed system.  
Plenum assembly Diffuser with directional louvers used to direct  
the conditioned airow.  
Check valve A pressure-operated device used to direct the ow  
of refrigerant to the proper capillary tube, during either the heating  
or cooling cycle.  
Blower wheel Attaches to the indoor side of the fan motor shaft  
and is used for distributing unconditioned, room side air though the  
heat exchanger and delivering conditioned air into the room.  
Capillary tube A cylindrical meter device used to evenly distribute  
the ow of refrigerant to the heat exchangers (coils.)  
Slinger fan blade Attaches to the outdoor side of the fan motor  
shaft and is used to move outside air through the condenser coil,  
while slinging condensate water out of the base pan and onto  
the condenser coil, thus lowering the temperature and pressures  
within the coil.  
ELECTRICAL COMPONENTS  
Thermostat Used to maintain the specied room side comfort  
level  
Capacitor Reduces line current and steadies the voltage supply,  
while greatly improving the torque characteristics of the fan motor  
and compressor motor.  
MoneySaver® switch When engaged, it sends the power sup-  
ply to the fan motor through the thermostat, which allows for a  
cycle-fan operation.  
Fan Motor Dual-shafted fan motor operates the indoor blower  
wheel and the condenser fan blade simultaneously.  
Heat anticipator Used to provide better thermostat and room  
air temperature control.  
7
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Refrigeration System Sequence of Operation  
A good understanding of the basic operation of the refrigera-  
tion system is essential for the service technician. Without this  
understanding, accurate troubleshooting of refrigeration system  
problems will be more difcult and time consuming, if not (in some  
cases) entirely impossible. The refrigeration system uses four basic  
principles (laws) in its operation they are as follows:  
In the case of the capillary tube this is accomplished (by design)  
through size (and length) of device, and the pressure difference  
present across the device.  
Since the evaporator coil is under a lower pressure (due to the  
suction created by the compressor) than the liquid line, the liquid  
refrigerant leaves the metering device entering the evaporator coil.  
As it enters the evaporator coil, the larger area and lower pressure  
allows the refrigerant to expand and lower its temperature (heat  
intensity). This expansion is often referred to as “boiling”. Since  
the unit’s blower is moving Indoor air across the nned surface  
of the evaporator coil, the expanding refrigerant absorbs some of  
that heat. This results in a lowering of the indoor air temperature,  
hence the “cooling” effect.  
1. “Heat always ows from a warmer body to a cooler body.”  
2. “Heat must be added to or removed from a substance before  
a change in state can occur”  
3. “Flow is always from a higher pressure area to a lower  
pressure area.”  
4. “The temperature at which a liquid or gas changes state is  
dependent upon the pressure.”  
The expansion and absorbing of heat cause the liquid refrigerant  
to evaporate (i.e. change to a gas). Once the refrigerant has been  
evaporated (changed to a gas), it is heated even further by the  
air that continues to ow across the evaporator coil.  
The refrigeration cycle begins at the compressor. Starting the  
compressor creates a low pressure in the suction line which draws  
refrigerant gas (vapor) into the compressor. The compressor then  
“compresses” this refrigerant, raising its pressure and its (heat  
intensity) Temperature.  
The particular system design determines at exactly what point (in  
the evaporator) the change of state (i.e. liquid to a gas) takes place.  
In all cases, however, the refrigerant must be totally evaporated  
(changed) to a gas before leaving the evaporator coil.  
The refrigerant leaves the compressor through the discharge line  
as a hot high pressure gas (vapor). The refrigerant enters the  
condenser coil where it gives up some of its heat. The condenser  
fan moving air across the coil’s nned surface facilitates the transfer  
of heat from the refrigerant to the relatively cooler outdoor air.  
The low pressure (suction) created by the compressor causes  
the refrigerant to leave the evaporator through the suction line  
as a cool low pressure vapor. The refrigerant then returns to the  
compressor, where the cycle is repeated.  
When a sufcient quantity of heat has been removed from the  
refrigerant gas (vapor), the refrigerant will “condense” (i.e. change  
to a liquid). Once the refrigerant has been condensed (changed)  
to a liquid it is cooled even further by the air that continues to ow  
across the condenser coil.  
Refrigerant System Components  
The RAC design determines at exactly what point (in the condenser)  
the change of state (i.e. gas to a liquid) takes place. In all cases,  
however, the refrigerant must be totally condensed (changed) to a  
liquid before leaving the condenser coil.  
Suction  
Line  
Discharge  
Line  
Evaporator  
Coil  
Condenser  
Coil  
The refrigerant leaves the condenser coil through the liquid line  
as a warm high pressure liquid. It next will pass through the  
refrigerant drier (if so equipped). It is the function of the drier to  
trap any moisture present in the system, contaminants, and large  
particulate matter.  
Compressor  
Metering  
Device  
Refrigerant Drier  
Liquid  
Line  
The liquid refrigerant next enters the metering device. The  
metering device is a capillary tube. The purpose of the metering  
device is to “meter” (i.e. control or measure) the quantity of  
refrigerant entering the evaporator coil.  
Refrigerant  
Dryer  
8
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Sealed Refrigeration System Repairs  
IMPORTANT  
ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER.  
ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER.  
EQUIPMENT REQUIRED  
HERMETIC COMPONENT REPLACEMENT cont’d  
1. Voltmeter  
6. Pressurize system to 30 PSIG with proper refrigerant and boost  
refrigerant pressure to 150 PSIG with dry nitrogen.  
2. Ammeter  
7. Leak test complete system with electric halogen leak  
detector, correcting any leaks found.  
3. Ohmmeter  
4. E.P.A. Approved Refrigerant Recovery System.  
8. Reduce the system to zero gauge pressure.  
5.  
Vacuum Pump (capable of 200 microns or less vacuum.)  
9. Connect vacuum pump to high side and low side of system  
with deep vacuum hoses, or copper tubing. (Do not use  
regular hoses.)  
6. Acetylene Welder  
7. Electronic Halogen Leak Detector (G.E. Type H-6 or  
equivalent.)  
10. Evacuate system to maximum absolute holding pressure  
of 200 microns or less. NOTE: This process can be  
accelerated by use of heat lamps, or by breaking the  
vacuum with refrigerant or dry nitrogen at 5,000 microns.  
Pressure system to 5 PSIG and leave in system a  
minimum of 10 minutes. Release refrigerant, and proceed  
with evacuation of a pressure of 200 microns or less.  
8. Accurate refrigerant charge measuring device such as:  
a. Balance Scales - 1/2 oz. accuracy  
b. Charging Board - 1/2 oz. accuracy  
9. High Pressure Gauge - (0 - 400 lbs.)  
10. Low Pressure Gauge - (30 - 150 lbs.)  
11. Vacuum Gauge - (0 - 1000 microns)  
11. Break vacuum by charging system from the high side with  
the correct amount of liquid refrigerant specied. This will  
prevent boiling the oil out of the crankcase, and damage  
to the compressor due to over heating.  
EQUIPMENT MUST BE CAPABLE OF:  
1. Recovery CFC’s as low as 5%.  
2. Evacuation from both the high side and low side of the  
system simultaneously.  
NOTE: If the entire charge will not enter the high side, allow the  
remainder to enter the low side in small increments while operating  
the unit.  
3. Introducing refrigerant charge into high side of the  
system.  
12.  
Restart unit several times after allowing pressures to stabilize.  
Pinch off process tubes, cut and solder the ends. Remove  
pinch off tool, and leak check the process tube ends.  
4. Accurately weighing the refrigerant charge actually  
introduced into the system.  
5. Facilities for owing nitrogen through refrigeration tubing  
during all brazing processes.  
SPECIAL PROCEDURE IN THE CASE OF COMPRESSOR  
MOTOR BURNOUT  
HERMETIC COMPONENT REPLACEMENT  
1. Recover all refrigerant and oil from the system.  
The following procedure applies when replacing components  
in the sealed refrigeration circuit or repairing refrigerant leaks.  
(Compressor, condenser, evaporator, capillary tube, refrigerant  
leaks, etc.)  
2. Remove compressor, capillary tube and lter drier from the  
system.  
3. Flush evaporator condenser and all connecting tubing with  
dry nitrogen or equivalent, to remove all contamination  
from system. Inspect suction and discharge line for carbon  
deposits. Remove and clean if necessary.  
1. Recover the refrigerant from the system at the process  
tube located on the high side of the system by installing a  
line tap on the process tube. Apply gauge from process  
tube to EPA approved gauges from process tube to EPA  
approved recovery system. Recover CFC’s in system to at  
least 5%.  
4. Reassemble the system, including new drier strainer and  
capillary tube.  
5. Proceed with processing as outlined under hermetic  
component replacement.  
2. Cut the process tube below pinch off on the suction side  
of the compressor.  
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING  
AND SERVICE  
3. Connect the line from the nitrogen tank to the suction  
process tube.  
Basically, troubleshooting and servicing rotary compressors  
is the same as on the reciprocating compressor with only one  
main exception:  
4. Drift dry nitrogen through the system and un-solder the  
more distant connection rst. (Filter drier, high side process  
tube, etc.)  
NEVER, under any circumstances, charge a rotary compressor  
through the LOW side. Doing so would cause permanent damage  
to the new compressor.  
5. Replace inoperative component, and always install a new  
lter drier. Drift dry nitrogen through the system when  
making these connections.  
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Refrigerant Charging  
NOTE: BECAUSE THE RAC SYSTEM IS A SEALED SYSTEM,  
SERVICE PROCESS TUBES WILL HAVE TO BE INSTALLED.  
FIRST INSTALL A LINE TAP AND REMOVE REFRIGERANT  
FROM SYSTEM. MAKE NECESSARY SEALED SYSTEM  
REPAIRS AND VACUUM SYSTEM. CRIMP PROCESS TUBE  
LINE AND SOLDER END SHUT. DO NOT LEAVE A SERVICE  
VALVE IN THE SEALED SYSTEM.  
METHOD OF CHARGING  
The acceptable method for charging the RAC system is the  
Weighed in Charge Method. The weighed in charge method is  
applicable to all units. It is the preferred method to use, as it is the  
most accurate.  
The weighed in method should always be used whenever a charge  
is removed from a unit such as for a leak repair, compressor  
replacement, or when there is no refrigerant charge left in the unit.  
To charge by this method, requires the following steps:  
Proper refrigerant charge is essential to proper unit operation.  
Operating a unit with an improper refrigerant charge will result in  
reduced performance (capacity) and/or efciency. Accordingly,  
the use of proper charging methods during servicing will insure  
that the unit is functioning as designed and that its compressor  
will not be damaged.  
1. Install a piercing valve to remove refrigerant from the  
sealed system. (Piercing valve must be removed from  
the system before recharging.)  
2. Recover Refrigerant in accordance with EPA  
regulations.  
Too much refrigerant (overcharge) in the system is just as bad (if  
not worse) than not enough refrigerant (undercharge). They both  
can be the source of certain compressor failures if they remain  
uncorrected for any period of time. Quite often, other problems  
(such as low air ow across evaporator, etc.) are misdiagnosed as  
refrigerant charge problems. The refrigerant circuit diagnosis chart  
will assist you in properly diagnosing these systems.  
3. Install a process tube to sealed system.  
4. Make necessary repairs to system.  
5. Evacuate system to 250 - 300 microns or less.  
6. Weigh in refrigerant with the property quantity of R-22  
refrigerant.  
An overcharged unit will at times return liquid refrigerant (slugging)  
back to the suction side of the compressor eventually causing a  
mechanical failure within the compressor. This mechanical failure  
can manifest itself as valve failure, bearing failure, and/or other  
mechanical failure. The specic type of failure will be inuenced  
by the amount of liquid being returned, and the length of time the  
slugging continues.  
7. Start unit, and verify performance.  
8. Crimp the process tube and solder the end shut.  
Not enough refrigerant (Undercharge) on the other hand, will cause  
the temperature of the suction gas to increase to the point where it  
does not provide sufcient cooling for the compressor motor. When  
this occurs, the motor winding temperature will increase causing  
the motor to overheat and possibly cycle open the compressor  
overload protector. Continued overheating of the motor windings  
and/or cycling of the overload will eventually lead to compressor  
motor or overload failure.  
NOTE: In order to access the sealed system it will be necessary to install Schrader type ttings to the process tubes  
on the discharge and suction of the compressor. Proper refrigerant recovery procedures need to be adhered to as  
outlined in EPA Regulations. THIS SHOULD ONLY BE ATTEMPTED BY QUALIFIED SERVICE PERSONNEL.  
10  
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Refrigerant Charging  
UNDERCHARGED REFRIGERANT SYSTEMS  
An undercharged system will result in poor performance (low  
pressures, etc.) in both the heating and cooling cycle.  
low charge, however, frosting and thawing can also be caused by  
insufcient air over the evaporator.  
Whenever you service a unit with an undercharge of refrigerant,  
always suspect a leak. The leak must be repaired before charging  
the unit.  
Checks for an undercharged system can be made at the compressor  
. If the compressor seems quieter than normal, it is an indication of  
a low refrigerant charge. A check of the amperage drawn by the  
compressor motor should show a lower reading. (Check the Unit  
Specication.) After the unit has run 10 to 15 minutes, check the  
gauge pressures.  
To check for an undercharged system, turn the unit on, allow the  
compressor to run long enough to establish working pressures in  
the system (15 to 20 minutes).  
Gauges connected to system with an undercharge will have low  
head pressures and substantially low suction pressures.  
During the cooling cycle you can listen carefully at the exit of the  
metering device into the evaporator; an intermittent hissing and  
gurgling sound indicates a low refrigerant charge. Intermittent  
frosting and thawing of the evaporator is another indication of a  
NOTE: Heat pump  
refrigeration  
drawing  
OVERCHARGED REFRIGERANT SYSTEMS  
Compressor amps will be near normal or higher. Noncondensables  
can also cause these symptoms. To conrm, remove some of the  
charge, if conditions improve, system may be overcharged. If condi-  
tions don’t improve, Noncondensables are indicated.  
An over charge can cause the compressor to fail, since it would  
be “slugged” with liquid refrigerant.  
The charge for any system is critical. When the compressor is noisy,  
suspect an overcharge, when you are sure that the air quantity over  
the evaporator coil is correct. Icing of the evaporator will not be  
encountered because the refrigerant will boil later if at all. Gauges  
connected to system will usually have higher head pressure  
(depending upon amount of overcharge). Suction pressure should  
be slightly higher.  
Whenever an overcharged system is indicated, always make sure  
that the problem is not caused by air ow problems. Improper  
air ow over the evaporator coil may indicate some of the same  
symptoms as an overcharged system.  
11  
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Refrigerant Charging  
RESTRICTED REFRIGERANT SYSTEM  
A quick check for either condition begins at the evaporator. With  
a partial restriction, there may be gurgling sounds at the metering  
device entrance to the evaporator. The evaporator in a partial  
restriction could be partially frosted or have an ice ball close to the  
entrance of the metering device. Frost may continue on the suction  
line back to the compressor.  
Troubleshooting a restricted refrigerant system can be  
difcult. The following procedures are the more common  
problems and solutions to these problems. There are two  
types of refrigerant restrictions: Partial restrictions and  
complete restrictions.  
• A partial restriction allows some of the refrigerant to circulate  
through the system.  
Often a partial restriction of any type can be found by feel, as  
there is a temperature difference from one side of the restriction  
to the other.  
• With a complete restriction there is no circulation of refrigerant  
in the system.  
With a complete restriction, there will be no sound at the metering  
device entrance. An amperage check of the compressor with a  
partial restriction may show normal current when compared to the  
unit specication. With a complete restriction the current drawn may  
be considerably less than normal, as the compressor is running  
in a deep vacuum (no load). Much of the area of the condenser  
will be relatively cool since most or all of the liquid refrigerant will  
be stored there.  
• Restricted refrigerant systems display the same symptoms as  
a “low-charge condition.”  
• When the unit is shut off, the gauges may equalize very  
slowly.  
• Gauges connected to a completely restricted system will run  
in a deep vacuum. When the unit is shut off, the gauges will  
not equalize at all.  
The following conditions are based primarily on a system in the  
cooling mode.  
12  
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Cooling Only Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Check voltage at compressor. 115V & 230V units  
will operate at 10% voltage variance  
Low voltage  
Set t-stat to coldest position. Test t-stat & replace if  
inoperative  
T-stat not set cold enough or inoperative  
Hard start compressor. Direct test compressor. If  
compressor starts, add starting components  
Compressor hums but cuts off on B10 overload  
Open or shorted compressor windings  
Compressor  
does not run  
Check for continuity & resistance  
Open overload  
Open capacitor  
Test overload protector & replace if inoperative  
Test capacitor & replace if inoperative  
Test for continuity in all positions. Replace if inop-  
erative  
Inoperative system switch  
Broken, loose or incorrect wiring  
Refer to appropriate wiring diagrams to check wiring  
Problem  
Possible Cause  
Inoperative system switch  
Broken, loose or incorrect wiring  
Open capacitor  
Action  
Test switch & replace if inoperative  
Refer to applicable wiring diagram  
Test capacitor & replace if inoperative  
Test switch & replace if inoperative  
Fan motor  
does not run  
Fan speed switch open  
Test fan motor & replace if inoperative (be sure  
internal overload has had time to reset)  
Inoperative fan motor  
Problem  
Possible Cause  
Action  
Undersized unit  
Refer to industry standard sizing chart  
Set to coldest position. Test t-stat & replace if neces-  
sary  
T-stat open or inoperative  
Dirty lter  
Clean as recommended in Owner's Manual  
Use pressure wash or biodegradable cleaning agent  
to clean  
Dirty or restricted condenser or evaporator coil  
Poor air circulation  
Does not cool or  
only cools slightly  
Adjust discharge louvers. Use high fan speed  
Close doors. Instruct customer on use of this feature  
Check for leak & make repair  
Fresh air or exhaust air door open on applicable  
models  
Low capacity - undercharge  
Check amperage draw against nameplate. If not  
conclusive, make pressure test  
Compressor not pumping properly  
13  
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Cooling Only Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Replace fuse, reset breaker. If repeats, check fuse  
or breaker size. Check for shorts in unit wiring &  
components  
Fuse blown or circuit tripped  
Power cord not plugged in  
System switch in "OFF" position  
Inoperative system switch  
Plug it in  
Unit does not run  
Set switch correctly  
Test for continuity in each switch position  
Loose or disconnected wiring at switch or other  
components  
Check wiring & connections. Reconnect per wiring  
diagram  
Problem  
Possible Cause  
Action  
Dirty lter  
Clean as recommended in Owner's Manual  
Check for dirty or obstructed coil. Use pressure  
wash or biodegradable cleaning agent to clean  
Restricted airow  
Inoperative t-stat  
Test for shorted t-stat or stuck contacts  
De-ice coil & check for leak  
Evaporator coil  
freezes up  
Short of refrigerant  
Inoperative fan motor  
Test fan motor & replace if inoperative  
De-ice coil. Check temp. differential (delta T) across  
coil. Touch test coil return bends for same temp.  
Test for low running current  
Partially restricted capillary tube  
Problem  
Possible Cause  
Action  
Unit undersized. Test cooling performance & replace  
with larger unit if needed  
Excessive heat load  
Check for partially iced coil & check temperature  
split across coil  
Restriction in line  
Refrigerant leak  
Compressor runs  
continually & does not  
cycle off  
Check for oil at silver soldered connections. Check  
for partially iced coil. Check split across coil. Check  
for low running amperage  
Check operation of t-stat. Replace if contacts  
remain closed.  
T-stat contacts stuck  
T-stat incorrectly wired  
Refer to appropriate wiring diagram  
Problem  
Possible Cause  
Action  
Disconnect power to unit. Remove cover of t-stat &  
check if contacts are stuck. If so, replace t-stat  
T-stat contacts stuck  
T-stat does not turn  
unit off  
T-stat set at coldest point  
Incorrect wiring  
Turn to higher temp. setting to see if unit cycles off  
Refer to appropriate wiring diagrams  
Unit undersized for area to be cooled  
Refer to industry standard sizing chart  
14  
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Cooling Only Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Check operation of unit. Replace overload if system  
operation is satisfactory  
Overload inoperative. Opens too soon  
Allow a minimum of 2 minutes to allow pressures  
to equalize before attempting to restart. Instruct  
customer of waiting period  
Compressor restarted before system pressures  
equalized  
Check voltage with unit operating. Check for  
other appliances on circuit. Air conditioner should  
be in separate circuit for proper voltage & fused  
separately  
Low or uctuating voltage  
Compressor runs for  
short periods only.  
Cycles on overload  
Incorrect wiring  
Refer to appropriate wiring diagram  
Check by substituting a known good capacitor of  
correct rating  
Shorted or incorrect capacitor  
Restricted or low air ow through condenser coil  
Check for proper fan speed or blocked condenser  
Check for kinked discharge line or restricted  
condenser. Check amperage  
Compressor running abnormally hot  
Problem  
Possible Cause  
Action  
Place jumper across t-stat terminals to check if unit  
operates. If unit operates, replace t-stat.  
Loss of charge in t-stat bulb  
T-stat does not  
turn unit on  
Loose or broken parts in t-stat  
Incorrect wiring  
Check as above  
Refer to appropriate wiring diagram  
Problem  
Possible Cause  
Poorly installed  
Action  
Refer to Installation Manual for proper installation  
Reposition - adjust motor mount  
Fan blade striking chassis  
Check that compressor grommets have not  
deteriorated. Check that compressor mounting parts  
are not missing  
Noisy operation  
Compressor vibrating  
Check assembly & parts for looseness, rubbing &  
rattling  
Improperly mounted or loose cabinet parts  
Problem  
Possible Cause  
Action  
Evaporator drain pan overowing  
Clean obstructed drain trough  
Evaporator drain pan broken or cracked. Reseal or  
replace  
Condensation forming on base pan  
Poor installation resulting in rain entering the room  
Check installation instructions. Reseal as required  
Water leaks into the  
room  
Clean the dirty evaporator coil. Use pressure wash  
or biodegradable cleaning agent to clean  
Condensation on discharge grille louvers  
Chassis gasket not installed  
Install gasket, per Installation manual  
Downward slope of unit is too steep  
Refer to installation manual for proper installation  
15  
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Cooling Only Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Ensure that foam gaskets are installed in between  
window panes & in between the unit & the sleeve.  
Also, ensure that fresh air/exhaust vents (on  
applicable models) are in the closed position & are  
in tact  
Sublimation:  
When  
unconditioned saturated, outside air mixes with  
conditioned air, condensation forms on the cooler  
surfaces  
Water "spitting"  
into room  
Follow installation instructions to ensure that  
downward pitch of installed unit is no less than 1/4"  
& no more than 3/8"  
Downward pitch of installation is too steep  
Clean & advise customer of periodic cleaning &  
maintenance needs of entire unit  
Restricted coil or dirty lter  
Problem  
Possible Cause  
Action  
Adjust louvers for best possible air circulation  
Operate in "MoneySaver" position  
Advise customer  
Insufcient air circulation thru area to be air  
conditioned  
Excessive moisture  
Oversized unit  
Inadequate vapor barrier in building structure,  
particularly oors  
Problem  
Possible Cause  
Action  
T-stat differential too narrow  
Replace t-stat  
Plenum gasket not sealing, allowing discharge air to  
short cycle t-stat  
Check gasket. Reposition or replace as needed  
T-stat short cycles  
Clean & advise customer of periodic cleaning &  
maintenance needs of entire unit  
Restricted coil or dirty lter  
Problem  
Possible Cause  
Action  
Anticipator (resistor) wire disconnected at t-stat or  
system switch  
Refer to appropriate wiring diagram  
Disconnect plus from outlet. Remove resistor from  
bracket. Insert plug & depress "COOL" & "FAN  
AUTOMATIC" buttons. Place t-stat to warmest  
setting. Feel resistor for temperature. If no heat,  
replace resistor  
Prolonged off cycles  
(automatic operation)  
Anticipator (resistor) shorted or open  
Partial loss of charge in t-stat bulb causing a wide  
differential  
Replace t-stat  
Problem  
Possible Cause  
Action  
Evaporator drain pan cracked or obstructed  
Repair, clean or replace as required  
Detach shroud from pan & coil. Clean & remove old  
sealer. Reseal, reinstall & check  
Water in compressor area  
Outside water leaks  
Use pressure wash or biodegradable cleaning agent  
to clean  
Obstructed condenser coil  
Fan blade/slinger ring improperly positioned  
Adjust fan blade to 1/2" of condenser coil  
16  
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Heat / Cool Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Disconnect power to unit. Remove resistor from t-  
stat bulb block. Plus in unit & allow to operate. Feel  
resistor for heat. If not heat, replace resistor  
Heat anticipator (resistor) shorted (on applicable  
models)  
Room temperature  
uneven  
(Heating cycle)  
Wide differential - partial loss of t-stat bulb charge  
Incorrect wiring  
Replace t-stat & check  
Refer to appropriate wiring diagram. Resistor is  
energized during "ON" cycle of compressor or fan.  
Problem  
Possible Cause  
Action  
Incorrect wiring  
Refer to appropriate wiring diagram  
Defrost control timer motor not advancing  
(applicable models)  
Check for voltage at "TM" & "TM1" on timer. If no  
voltage, replace control  
If outside coil temperature is 25F or below, &  
Defrost control out of calibration (applicable models) preselected time limit has elapsed, replace defrost  
control  
Unit will not defrost  
If contacts remain closed between terminals "2"  
Defrost control contacts stuck  
& "3" of the defrost control after preselected time  
interval has passed, replace control  
Defrost control bulb removed from or not making  
good coil contact  
Reinstall & be assured that good bulb to coil contact  
is made  
Problem  
Possible Cause  
Exhaust or fresh air door open  
Dirty lter  
Action  
Check if operating properly. Instruct customer on  
proper use of control  
Clean as recommended in Owner's Manual  
Check heat rise across coil. If unit operates  
efciently, check if insulation can be added to attic  
or walls. If insulation is adequate, recommend  
additional unit or larger one  
Unit undersized  
Does not heat  
adequately  
T-stat should close at 38°F. Check continuity of  
control. If temperature is below 38°F, replace control  
Outdoor t-stat open (applicable models)  
Heater hi-limit control cycling on & off  
Check for adequate fan air across heater. Check  
control for open at 160°F & close at 150°F  
Shorted supplementary heater  
Incorrect wiring  
Ohmmeter check, approx. 32-35 ohms  
Check applicable wiring diagram  
17  
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Heat / Cool Room Air Conditioners: Troubleshooting Tips  
Problem  
Possible Cause  
Action  
Refer to applicable wiring diagram  
Check for continuity of coil  
Incorrect wiring  
Defective solenoid coil  
Unit cools when heat  
is called for  
Block condenser coil & switch unit to cooling. Allow  
pressure to build up in system, then switch to  
heating. If valve fails to shift, replace valve.  
Reversing valve fails to shift  
Inoperative system switch  
Check for continuity of system switch  
Problem  
Possible Cause  
Action  
Check for partially starved outer coil. Replace  
heating capillary tube  
Heating capillary tube partially restricted  
Switch unit several times from heating to cooling.  
Check temperature rise across coil. Refer to  
specication sheet for correct temperature rise  
Cooling adequate,  
but heating  
Check valve leaking internally  
insufcient  
De-energize solenoid coil, raise head pressure,  
energize solenoid to break loose. If valve fails to  
make complete shift, replace valve.  
Reversing valve failing to shift completely;  
bypassing hot gas  
18  
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Components  
Model CP14N10  
19  
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Model CP14N10  
No Description  
Qty  
Friedrich Part#  
Code  
1
2
3
4
5
6
7
8
9
Supporter Assy  
Screw ST4.2X13  
Window locking bracket  
Screw 4X20  
Seal strip 1  
Seal strip 2  
Curtain Assemby Left and Right  
Right Curtain  
Left Curtain  
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
4
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
67700200  
67700154  
67700113  
67700151  
67700128  
67700129  
67700201  
67700202  
67700203  
67700204  
67700155  
67700149  
67700170  
67700205  
67700158  
67700153  
67700206  
67700152  
67700207  
67700157  
67700159  
67700117  
67700208  
67700110  
67700112  
67700209  
67700109  
67700127  
67700130  
67700210  
67700124  
67700211  
67700121  
67700125  
67700212  
67700116  
10 Cabinet Assy  
11 Screw ST4.2X6.5  
12 Screw M4X8  
13 Connect cord  
14 Screw M4X5  
15 Washer 4  
16 Screw ST4.2X22  
17 Top Rail Assy  
18 Screw ST4X10  
19 Condenser Assy  
20 Nut with Washer M10  
21 Washer 10  
22 Fan Blade  
23 Shroud, Fan Blade  
24 Top Cover  
25 Motor Support  
26 Motor CJ100U  
27 Innerwall  
28 Shroud  
29 Air Outlet Foam  
30 Swing Louver  
31 Swing Linkage  
32 Motor, Swing Louver  
33 Inectional Axis  
34 Swing Support  
35 Fresh Air Door  
36 Blower Wheel  
20  
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Model CP14N10  
No Description  
Qty  
Friedrich Part#  
Code  
37 Clapboard of Snail Shell  
38 Base Plate of Air Flue  
39 Evaporator Assy  
40 Sensor Holder  
41 Compressor 44B124HXCEF  
42 Overload Protector  
43 Compressor Gasket  
44 Nut with washer M8  
45 Capillary Assy  
1
1
1
1
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14  
1
1
1
1
1
1
1
67700108  
67700106  
67700103  
67700213  
67700214  
67700215  
67700216  
67700156  
67700217  
67700131  
67700218  
67700219  
67700220  
67700221  
67700114  
67700222  
67700136  
67700223  
67700160  
67700224  
67700225  
67700226  
67700227  
67700228  
67700229  
67700230  
67700231  
67700232  
67700233  
67700234  
67700235  
67700236  
67700237  
67700105  
67700171  
46 Water Tray  
47 Capacitor 15uF/300VAC  
48 Capacitor 50uF/450V  
49 Relay 841-S-1A-D 110/120V  
50 Transformer 41X26.5C  
51 Capacitor clamp  
52 Main PCB M2A91J  
53 Electric box  
54 Isolation Washer D  
55 Wire Clamp  
56 Power cord  
57 Receiver Cover  
58 Membrane  
59 Control Panel Cover A  
60 Display Board 2A91J  
61 Front Panel Assy  
62 Guide Louver Linkage  
63 Filter  
64 Guide Louver  
65 Front Case  
66 Front Panel  
67 AS Window  
68 Remote Cover  
69 Chassis  
70 Chassis Fixer  
71 Remote Control  
21  
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Models CP18C30 & CP18N30  
No Description  
Qty  
Friedrich Part#  
Code  
1
2
3
4
5
6
7
8
9
Supporter Assy  
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
6
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
67700132  
67700154  
67700113  
67700151  
67700128  
67700129  
67700166  
67700168  
67700167  
67700111  
67700155  
67700149  
67700170  
67700150  
67700158  
67700153  
67700134  
67700152  
67700104  
67700157  
67700159  
67700117  
67700107  
67700110  
67700112  
67700164  
67700109  
67700127  
67700130  
67700120  
67700124  
67700133  
67700121  
67700125  
67700123  
Self-threading Screw ST4.2x22  
Window Locking Bracket  
Screw 4X20  
Seal Strip 1  
Seal Strip 2  
Curtain Assemby Left and Right  
Right Curtain  
Left Curtain  
10 Cabinet Assy  
11 Self-threading Screw ST4.2X6.5  
12 Screw Assay M4x8  
13 Connect Cord  
14 Screw M4X6  
15 Washer 4  
16 Self-threading Screw ST4.2x22  
17 Top Rail  
18 Self-threading Screw with Gasket ST4X10  
19 Condenser Assy  
20 Nut with Washer M10  
21 Washer 6  
22 Fan Blade  
23 Shroud, Fan Blade  
24 Upper Clapboard  
25 Motor Support  
26 Motor CJ100B  
27 Innerwall  
28 Blower Front  
29 Air Outlet Foam 1  
30 Swing Louver  
31 Lever of Vertical Guider  
32 Swing Motor SM020B  
33 Inectional Axis  
34 Cross Beam  
35 Fresh Air Door  
22  
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Models CP18C30 & CP18N30  
No Description  
Qty  
Friedrich Part#  
Code  
36 Blower Wheel  
1
1
1
1
2
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
8
1
1
1
1
1
1
1
1
67700116  
67700108  
67700106  
67700103  
67700141  
67700101  
67700102  
67700161  
67700156  
67700115  
67700131  
67700145  
67700144  
67700147  
67700146  
67700114  
67700136  
67700142  
67700160  
67700169  
67700143  
67700138  
67700137  
67700148  
67700165  
67700122  
67700163  
67700118  
67700119  
67700140  
67700139  
67700135  
67700126  
67700105  
67700162  
67700171  
37 Front Clapboard of Snail Shell  
38 Base Plate of Air Flue  
39 Evaporator Assy  
40 Insert Block  
41 Compressor 2K25S236AHF  
42 Overload Protector  
43 Compressor Gasket AD7070815  
44 Nut with Washer M8  
45 Capillary Assay  
46 Water Tray  
47 Capacitor 7uF/450V  
48 Capacitor CBB65 40uF/450V(TUV)  
49 Relay 841-S-1A-D 200V/240V TUV  
50 Power Transformer 41X26.5F  
51 Capacitor Clamp  
52 Electric box  
53 Main PCB J25713J  
54 Fixed Clamp  
55 Power cord  
56 Display Board J25713J  
57 Receiver Cover  
58 Control Panel Cover  
59 Touch Pad Plate  
60 Front Panel Assy  
61 Guide louver linkage  
62 Filter  
63 Horizontal air guider1  
64 Horizontal air guider2  
65 Up Filter Guide  
66 Down Filter Guide  
67 Panel  
68 Basepan  
69 Chassis Fixer  
70 Drain Plug  
71 Remote Control  
23  
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Components  
Model CP24N30  
24  
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Model CP24N30  
No Description  
Qty  
Friedrich Part#  
Code  
1
2
3
4
5
6
7
8
9
Supporter Assy  
Screw ST4.2X13  
Window locking bracket  
Screw 4X20  
Seal strip 1  
Seal strip 2  
LT & RT Curtain Assembly  
Right Curtain  
Left Curtain  
1
7
2
6
1
1
1
1
1
1
6
1
1
1
1
4
1
4
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
67700200  
67700154  
67700113  
67700151  
67700128  
67700129  
67700201  
67700202  
67700203  
67700238  
67700155  
67700149  
67700170  
67700205  
67700158  
67700153  
67700206  
67700152  
67700239  
67700157  
67700159  
67700117  
67700208  
67700240  
67700112  
67700241  
67700109  
67700242  
67700130  
67700210  
67700124  
67700133  
67700121  
67700125  
67700212  
67700243  
67700108  
10 Cabinet Assy  
11 Screw ST4.2X6.5  
12 Screw M4X8  
13 Connect cord  
14 Screw M4X5  
15 Washer 4  
16 Screw ST4.2X22  
17 Top Rail Assy  
18 Screw ST4X10  
19 Condenser Assy  
20 Nut with Washer M10  
21 Washer 10  
22 Fan Blade  
23 Shroud, Fan Blade  
24 Top Cover  
25 Motor Support  
26 Motor CJ100U  
27 Innerwall  
28 Shroud  
29 Air Outlet Foam  
30 Swing Louver  
31 Swing Linkage  
32 Motor, Swing Louver  
33 Inectional Axis  
34 Swing Support  
35 Fresh Air Door  
36 Blower Wheel  
37 Blower Front  
25  
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Model CP24N30  
No Description  
Qty  
Friedrich Part#  
Code  
38 Base Plate of Air Flue  
39 Evaporator Assy  
40 Sensor Holder  
41 Compressor 44B124HXCEF  
42 Overload Protector  
43 Compressor Gasket  
44 Nut with washer M8  
45 Capillary Assy  
1
1
1
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
14  
1
1
1
1
1
1
1
67700106  
67700103  
67700213  
67700244  
67700215  
67700216  
67700156  
67700245  
67700131  
67700145  
67700246  
67700147  
67700247  
67700114  
67700248  
67700136  
67700223  
67700160  
67700249  
67700225  
67700226  
67700227  
67700228  
67700229  
67700230  
67700231  
67700232  
67700233  
67700234  
67700235  
67700236  
67700250  
67700105  
67700171  
46 Water Tray  
47 Capacitor 15uF/300VAC  
48 Capacitor 50uF/450V  
49 Relay 841-S-1A-D 110/120V  
50 Transformer 41X26.5C  
51 Capacitor clamp  
52 Main PCB M2A91J  
53 Electric box  
54 Isolation Washer D  
55 Wire Clamp  
56 Power cord  
57 Receiver Cover  
58 Touch Pad Plate  
59 Control Panel Cover A  
60 Display Board 2A91J  
61 Front Panel Assy  
62 Guide Louver Linkage  
63 Filter  
64 Guide Louver  
65 Front Case  
66 Front Panel  
67 AS Window  
68 Remote Cover  
69 Basepan  
70 Chassis Fixer  
71 Remote Control  
26  
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Friedrich Air Conditioning Company  
P.O. Box 1540  
San Antonio, TX 78295  
210.357.4400  
ROOM AIR CONDITIONERS  
LIMITED WARRANTY  
FIRST YEAR  
ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from  
date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible  
for service. Any additional labor cost for removing inaccessible units and/or charges for mileage related to travel by a Service  
Agency that exceeds 25 miles one way will be the responsibility of the owner. This remedy is expressly agreed to be the exclusive  
remedy within twelve months from the date of the original purchase.  
SECOND THROUGH FIFTH YEAR  
SEALED REFRIGERANT SYSTEM: If the Sealed Refrigeration System (defined for this purpose as the compressor, condenser  
coil, evaporator coil, reversing valve, check valve, capillary, filter drier, and all interconnecting tubing) supplied by FRIEDRICH in  
your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase,  
FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will  
not pay the cost of diagnosis of the problem, removal, freight charges, and transportation of the air conditioner to and from the  
Service Agency, and the reinstallation charges associated with repair of the Sealed Refrigeration System. All such cost will be the  
sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the  
original purchase.  
APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District  
of Columbia, and Canada. This warranty is not applicable to:  
1. Air filters or fuses.  
2. Products on which the model and serial numbers have been removed.  
3. Products which have defects or damage which results from improper installation, wiring, electrical current  
characteristics, or maintenance; or caused by accident, misuse or abuse, fire, flood, alterations and/or misapplication  
of the product and/or units installed in a corrosive atmosphere, default or delay in performance caused by war,  
government restrictions or restraints, strikes, material shortages beyond the control of FRIEDRICH, or acts of God.  
OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service  
Organization in your area. They are listed in the Yellow Pages. If assistance is required in obtaining warranty performance, write  
to: Room Air Conditioner Service Manager, Friedrich Air Conditioning Co., P.O. Box 1540, San Antonio, TX 78295-1540.  
LIMITATIONS:  
THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty  
notwithstanding, ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY  
SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND  
EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR  
IMPLIED WARRANTY.  
NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of  
consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you.  
OTHER: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.  
PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.  
All service calls for explaining the operation of this product will be the sole responsibility of the consumer.  
All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to  
repairs being made.  
(10-04)  
Friedrich Air Conditioning Co.  
Post Ofce Box 1540 • San Antonio, Texas 78295-1540  
4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212  
(210) 357-4400 • FAX (210) 357-4480  
CP-14-18-24-Svc-Prts-07 (3-07)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Friedrich Air Conditioning Co.  
Post Office Box 1540 • San Antonio, Texas 78295-1540  
4200 N. Pan Am Expressway • San Antonio, Texas 78218-5212  
(210) 357-4400 • FAX (210) 357-4480  
CP-14-18-24-Svc-Prts-07 (3-07)  
Printed in the U.S.A.  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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