Carrier 40KMC 301 User Manual

40KMC------301  
40KMQ------301  
OWNER’S MANUAL  
40KMC------310/ 40KMQ------310  
General information  
smell of burning) and call Carrier Service for further instructions.  
A routine maintenance should be carried out on the unit to check the  
correct operation of the electric connections and protection devices.  
Unit operation and maintenance  
Read this instruction manual thoroughly before using the unit.  
Extraordinary maintenance operations must be carried out by  
specially trained personnel.  
Do not attempt to repair, move, modify or re-install the unit on your  
own. To avoid electric shock or fire make sure these operations  
are carried out by qualified personnel only.  
This unit complies with UL 1995 directive (Usa and Canada).  
Check that the main power supply voltage and frequency are as  
required for the unit; the power source must be sufficient to  
operate all other appliances connected to the same line.  
Also ensure that local building codes and NEC (National electrical  
code) requirements have been followed for the main supply circuit.  
To avoid personal injury or damage to unit,do not service until all  
power sources are shut down, locked out, and tagged out.  
Failure to do so could result in personal injury or unit damage.  
Contact the qualified service if one of the following events takes place:  
- hot or damaged power supply cable;  
- unusual noise during operation;  
- frequent operation of the protection devices;  
- unusual smell (such as smell of burning).  
WARNING:  
!
WARNING:  
!
To prevent fire, explosion or injury, do not operate the unit near  
dangerous substances or esposed to lighting equipment.  
Never operate unit without a lter or with grille removed. Damage  
to the unit or personal injury may result.  
All operation and maintenance manuals must be carefully looked  
after and kept with the equipment, should the unit change owners.  
Check that local building codes and NEC (National electrical code)  
requirements for the installation have been followed. In particular,  
ensure that a properly sized and connected ground wire is in place.  
Only use the unit for factory approved applications: the unit  
cannot be used in laundry premises.  
WARNING:  
!
If air lter is not replaced in the unit, dust and dirt gather in air  
conditioner and operation becomes impaired.  
A mist or cloud of vapor may be emitted from the unit, when  
switching from a cooling operation to a reverse cycle heating  
operation. This will occur when the unit has been operating in  
cooling mode for awhile and then is switched to heating. The  
combination of the evaporated indoor coil condensate and the dry  
room air, may result in a cloud of vapor being emitted from the  
unit. There is no need for concern.  
Inspect equipment for damage during transport. In case of  
damage file an immediate claim with the shipping company.  
Non-routine maintenance of the refrigerant circuit must only be  
carried out by qualified personnel.  
All of the manufacturing and packaging materials used for  
this appliance are biodegradable and recyclable.  
Dispose of the packaging material and of the remote control  
batteries in accordance with local requirements.  
This equipment contains refrigerant that must be disposed of  
correctly. When disposing of the unit at the end of its operational  
life, take the unit to an authorised waste disposal centre, for  
correct disposal procedures.  
Do not use damaged equipment. In case of malfunction, turn the  
unit OFF and disconnect the main supply.  
Disconnect the main power supply prior to any maintenance  
operations or prior to handling any internal unit parts.  
The manufacturer declines any liability for damage resulting from  
modifications or errors in the electrical or refrigerant connections,  
made during the installation, or from improper use of this equipment.  
This will invalidate the unit warranty conditions immediately.  
This unit will only work safely and correctly, if installed and tested  
by qualified personnel.  
Do not open the remote control to avoid possible damage.  
In case of malfunction contact a qualified service engineer.  
This unit contains moving parts. Ensure that these parts are kept  
out of the reach of children.  
Maintain the room temperature at general comfort conditions,  
especially when children, elderly or handicapped persons are present.  
In order to ensure correct use, the air conditioner must operate  
within the temperature limits indicated in the Operating Limits”  
table, included in the Technical manual. Failure to observe these  
limits may cause unit malfunction or water leakage.  
WARNING:  
!
The unit must always be switched OFF using the Room  
Controller. Do not switch OFF the split system by  
disconnecting the electric power supply.  
In order to avoid electric shock, fire or injury, stop the unit and  
disconnect the safety switch in case of abnormal events (such as  
7
6
1
2
3
4
5
System description  
B
A. Outdoor unit  
B. Indoor unit  
C. Room Controller  
(if foreseen)  
1. Air return  
2. Air filters  
3. Air supply  
4. Operation indicator light  
and receiver of remote  
control signals (if foreseen)  
5. Nameplate  
C
A
6. Interconnecting tubing  
7. Condensate drain (open)  
GB - 2  
40KMC------310/ 40KMQ------310  
Unit warning lights and controls - Fault code  
E N G L I S H  
P : Green LED  
Q : Red LED  
R : Yellow LED  
S : Remote control  
signal receiver  
Indoor unit LEDs  
Information concerning indoor unit operation, timer status and  
diagnostic is given by 3 LEDs located on the unit.  
Fault code  
Once a failure occurs with the indoor unit in operation, the green  
unit LED flashes at intervals of 0.5 seconds.  
The fault code is deduced from the number of times the green  
LED flashes, blocking unit operation.  
THE GREEN LED (P) shows the following conditions:  
Between one flash cycle and the next one, a pause of 5 seconds  
elapses.  
- Fault codes (diagnostic);  
- During normal operation, the LED is lit.  
Once a failure occurs, the LED flashes at intervals of 0.5  
seconds. The fault code is deduced from the number of times  
the LED flashes. Between one flash cycle and the next a pause  
of 5 seconds elapses.  
Table IX: Fault code  
Code  
Description  
3
Room air sensor fault  
Condensate discharge pump  
Indoor unit coil sensor fault  
Filter dirty  
THE RED LED (Q) gives the following information:  
2
- During normal operation, the LED is OFF;  
- During defrost the LED is lit;  
- During the test for wired connection, the LED flashes at 0.1  
second intervals.  
4
6*  
7
Outdoor unit failure  
10  
11  
12  
13  
14  
EEPROM corrupt  
THE YELLOW LED (R) shows the operation in timer mode.  
During this operation the LED is lit.  
If the timer mode is active and the unit is immediately  
restarted after a stop, this LED flashes until a new signal is  
sent to the unit.  
Card serial number damaged  
Address / zone incomplete  
Gas flow distributor corrupt  
Outdoor air thermistor  
In case the Room Controller is not working, obtain a qualified  
service personnel.  
* with enabled code  
Table II: Periodical checks  
For a good operation of the  
air conditioner it is  
recommended to carry out  
checks and maintenance  
as indicated.  
Indoor unit  
Every month Every 4 months Every year  
(1)  
Clean air filter (2)  
Recommended  
Clean drain pipe (2)  
maintenance intervals may  
vary depending on the  
installation environment,  
e.g. dusty zones, etc.  
Outdoor unit  
Every month Every 4 months Every year  
Clean outdoor coil from outside  
Clean outdoor coil from inside (2)  
Blow air over electric parts (2)  
Check electric connection tightening (2)  
Clean fan wheel (2)  
(1) Increase frequency in  
dusty zones.  
(2) Operations to be  
carried out by qualified  
service personnel.  
Refer also to  
Check fan tightening (2)  
Clean drain pan (2)  
Installation Manual.  
GB - 3  
40KMC------310/ 40KMQ------310  
Optimum comfort... - Correct cleaning - Before a long shutdown period  
Optimum comfort and minimum power  
consumption  
Correct cleaning  
Turn the unit OFF and switch the main supply OFF.  
Keep room temperature at a comfortable level.  
Use only a clean, damp cloth and a mild detergent.  
Do not use flammable liquids, solvents or abrasive powders that  
may result in damage to the panels.  
Use only a dry cloth to clean the remote control.  
Before a long shutdown period  
Only open doors and windows when strictly necessary.  
Ask to clean the filter and replace it in the unit.  
12 h  
When cooling, avoid direct sunlight in the room: if possible, draw  
the curtains or close the shades.  
Do not obstruct the air intake or outlet of the indoor unit.  
Obstructions will cause a reduction in the air flow and the  
conditioning effect, resulting in unit malfunction.  
Keep the unit in operation for half a day in the ventilation  
(fan only) mode in order to dry all internal parts.  
Ensure that the air filters are clean.  
Ensure that the air distribution in the room is uniform by properly  
adjusting the air flow direction.  
Switch the unit OFF and wait for at least 3 minutes before switch-  
ing OFF the main electric supply.  
Periodically clean the area surrounding the outdoor unit and the  
air intake, in order to avoid reduced air circulation.  
Clean indoor and outdoor units.  
Keep heat sources away from the unit: panels may be damaged.  
GB - 4  
40KMC------310/ 40KMQ------310  
Room controllergeneral information and characteristics  
E N G L I S H  
Characteristics  
Single unit operation:  
Ability to control one unit only.  
Grouping:  
Ability to control 2 to 6 units with one Room Controller.  
Operating modes:  
Off, Heat, Cool, Dry, Auto, and Fan only.  
B
A
A = Display readout  
B = Increase  
temperature /  
change louvre  
setting button  
C = Decrease  
temperature /  
change louvre  
setting button  
D = Fan selection  
button  
Fan speeds:  
Low, Medium, High, and Auto.  
Louver control:  
Auto and swing.  
Desired temperature:  
Range between 17 and 32 °C (63 and 90 °F).  
Room Thermistor Override:  
Allows to use air sensor located in the Room Controller instead  
of the one located into the unit.  
E = Mode selection  
button  
Diagnostics:  
Detects the fault of air sensor in the Room Controller.  
A1shown on the screen indicates this anomaly.  
E D  
C
Display of selected functions  
up  
down  
UPand DOWNbuttons  
Buttons for raising or lowering the temperature or for selecting  
the AUTOor SWINGlouver mode.  
ቪ ቩ ቨ  
MODE  
Automatic  
Off  
Temperature  
selected / room  
temperature  
Set temperature  
Operating  
position of the air  
louvre  
Fan speed  
Heating  
Button for operation mode selection.  
Cooling  
Dehumidification  
only  
FAN  
Button for fan or louvre selection.  
Table I: Unit protection devices  
System  
Type of protection  
Effect of protection Operation mode  
When on  
Heating in  
heat pump mode  
Cold draft prevention  
Defrost cycle  
Indoor fan off  
Indoor fan off  
Compressor off  
During unit operation  
During unit operation  
Heat pump  
Heating in  
heat pump mode  
Indoor coil  
freeze protection  
Cooling  
During unit operation  
At unit start-up or  
Cooling only  
and  
heat pump  
Against frequent  
compressor cycling  
Compressor  
time delay  
Cooling or heating  
in heat pump mode change of operating mode  
WARNING:  
During heat pump operation the unit will undergo several defrost cycles to remove ice that might collect on the outdoor unit in very low ambient  
temperatures. In these cycles, the indoor fan will be automatically off and cannot operate until defrost cycle is completed.  
GB - 5  
40KMC------310/ 40KMQ------310  
Room controllerwired control  
Power up  
AUTO, HEAT, COOL and DRY Modes:  
All segments of the LCD should be energized for five seconds.  
The mode, fan, louver, desired temperature and configuration  
information should be read from the EEPROM.  
If the EEPROM values are not valid, the following should be used  
as defaults.  
ICONS Energized:  
Operation Mode ICON.  
Room Temperature if configured for Room Thermistor Override  
(operated by Room Controller), otherwise user selected  
temperature with the SET TEMPIcon.  
FAN/LOUVER Icon with the user selected Fan and Louver  
settings.  
Operating Mode  
Fan Speed  
Desired Temperature  
°F o °C  
= AUTO  
= AUTO  
= 72°F  
= F  
Buttons available:  
Louver  
Room Thermistor Override  
= AUTO  
= OFF  
All Buttons are available.  
Cooling only vs Heat/Cool Remote = Heat/Cool  
AUTO Automatic operation  
NOTE:  
The compressor and electric heater must be off for at least 30  
Minutes, this time being necessary to pass from Heating to  
Cooling, or Cooling to Heating.  
This will prevent the system from switching between Heating  
and Cooling continuously.  
Example of normal operation  
When switched on, the control display appears.  
Setting mode operation  
MODEbutton  
Pressing the MODEbutton will cause the mode to change.  
The MODEbutton must be released and then pressed again in  
order to change to the next mode.  
The active mode will always be lit in normal operation.  
Available modes to select are:  
Heat/Cool Remote:  
COOL Cooling operation  
OFF,  
COOL, DRY,  
FAN ONLY,  
AUTO,  
HEAT  
Cooling Only Remote:  
OFF,  
COOL, DRY and  
FAN ONLY  
When the MODEbutton is not pressed for 15 seconds, the next  
press will always switch the mode to OFF.  
OFF Mode:  
ICONS Energized:  
OFF Mode  
DRY Drying operation.  
Room Temperature if configured for Room Thermistor Override,  
otherwise nothing  
Buttons available:  
MODEbutton  
HEAT Heating operation.  
GB - 6  
40KMC------310/ 40KMQ------310  
Room controllerwired control  
E N G L I S H  
Auto mode setting will be displayed by blinking the fan Medium  
speed and High speed icons in order (Med then Hi then repeat).  
FAN ONLY Mode:  
ICONS Energized:  
Room Temperature if configured for Room Thermistor Override  
(operated by Room Controller), otherwise nothing.  
FAN/LOUVER Icon with the user selected Fan and Louver  
settings.  
Buttons available:  
MODEand FANbuttons are available.  
Low  
Medium  
High  
Automatic  
(Fan speed will automatically switch to the  
value required for optimum comfort).  
When this function is activated, the dotted  
symbols will flash.  
Louver mode selection  
fan only  
Ventilation operation only.  
UPand DOWNbutton  
(Selecting the desired temperature)  
up  
To enter louver mode selection, make sure the Room Controller is  
on and hold the FANbutton down for 5 seconds.  
After 5 seconds, the selected louver setting will be displayed.  
By pressing the up and down buttons the user can modify  
the louver desired configuration.  
down  
Pressing either the UPor DOWNbuttons will modify the desired  
temperature.  
The two settings will be displayed in the following way:  
The maximum desired temperature is 32°C (90°F) and the  
minimum desired temperature is 17°C (63°F).  
Whenever the setpoint is being displayed, the SET TEMPicon is  
illuminated.  
Whenever the display mode is changed from C to F, the setpoint is  
set to the default start-up values of 22°C for Cmode and 72°F for  
Fmode.  
Swith Swing Louver Icon - represents Swing Louver.  
Awith Auto Louver Icon - represents Auto Louver.  
Press FANbutton to exit LOUVER Mode Selection.  
This mode will exit automatically after 10 seconds if no buttons are  
pressed.  
The only way to change the operation mode, is to go back to this  
menu.  
NOTE:  
If units are grouped to one Room Controller , all units will end  
up having the same louver value.  
Louver Mode selection is not available during OFF mode.  
If the air sensor built in the Room Control is enabled, the  
display will indicate the room temperature after few seconds.  
:AUTO  
Automatic louvre positioning to the best position  
for the selected operating mode.  
FANbutton  
(Adjusting the ventilation speed)  
Pressing the FANbutton will cause the fan speed to change.  
The FANSPEED button must be pressed and then released  
to reach the desired speed (Low, Medium, High or Auto).  
The icon on the display indicates that change has occurred.  
:SWING  
Louvres swing continuously.  
GB - 7  
40KMC------310/ 40KMQ------310  
Troubleshooting  
No Room controller LCD display:  
service, please refer to the installation instructions.  
Restart air conditioner after having corrected the faults.  
Q (Red LED) indicator is illuminated:  
Mis-wiring of the 12 volt power to Room Controller control;  
verify that + 12 V and Ground are connected to the proper  
terrminals of the Controller (Reference Installation wiring  
section for correct connections): after disconnecting the  
power, correct the wiring problem and re-cycle power.  
Power not online; check that the units main power is  
connected.  
In the heating mode, the LED switches on to indicate an active  
defrost condition.  
The main control board should be operating normally: after  
verifing the wiring to the Room Controller, re-cycle the unit  
power.  
The unit emits unpleasant smells:  
No 12 volts between P and G of terminal block; check the  
installation of the J6 plug on the main control board: after  
disconnecting the power, correct the wiring problem and  
re-cycle power.  
Note: Those verifications need to be carried out by qualified  
personnel only.  
Unpleasant smells can accumulate on the air filters and then be  
dispersed into the room during air conditioner operation.  
Switch the unit OFF and contact an authorised service centre to  
have the filters cleaned.  
Restart unit in the ventilation (fan only) mode and open windows  
to change room air.  
+12 volts applied to Room Controller at the correct terminals  
and still does not operate:  
The unit makes strange noises:  
Occasionally the unit makes strange noises at start-up, during  
operation or when it has stopped.  
These are generally due to the effect of temperature changes on  
the plastic parts.  
The Room Controller is damaged; change the Room  
Controller and re-cycle power.  
Note: This operation needs to be carried out by qualified  
personnel only.  
Mist or Vapor Cloud emitted at start-up of Heating operation:  
Air conditioner will not start:  
A mist or cloud of vapor may be emitted from the unit, when  
switching from a cooling operation to a reverse cycle heating  
operation. This will occur when the unit has been operating in  
cooling mode for awhile and then is switched to heating. The  
combination of the evaporated indoor coil condensate and the dry  
room air, may result in a cloud of vapor being emitted from the  
unit. There is no need for concern.  
The main switch is switched OFF, place the switch in the ON  
position.  
The fuses on the main switch are burnt out; replace the fuses.  
( this operation need to be carried out by qualified personnel only).  
Wait for 3 minutes: protection against frequent compressor  
cycling is ON.  
Selected temperature is higher than the room temperature (or  
lower in the heating mode).  
WARNING:  
(models with electric heaters):  
If the manual reset, thermal trip device cuts out, switch the unit  
OFF and ON again at the main switch to reset.  
If the malfunction persists, contact your local authorised dealer.  
Air conditioner is not supplying enough cooling (or heating):  
Air cannot circulate freely.  
Dirty filter reduces air quantity circulating.  
Filter must be cleaned by skilled personnel only.  
Doors and/or windows are open.  
Fan speed has been set to low.  
Air flow direction is not correct for optimum ventilation.  
Selected temperature is not correct.  
A slight mist is emitted from the unit:  
A slight mist, coming out of the unit air outlet, is sometimes  
noticed during cooling operation. This is due to the cool air  
coming into contact with the room air.  
A slight whistling noise is heard when the air conditioner  
starts or stops:  
This is due to the refrigerant beginning to circulate or an  
adjustment of the refrigerant pressures. This is a normal  
operating condition.  
P (Green LED) indicator is flashing:  
System malfunction.  
Contact service organisation after having ensured that:  
Air circulation is not obstructed.  
Outdoor unit coil is not obstructed and causing severe reduction  
of air circulation.  
Condensate drainage tube is not obstructed.  
As regards fault codes to be communicated to the after-sales  
GB - 8  
L010127H09 - 0306  
Via R. Sanzio, 9 - 20058 Villasanta (MI) Italy - Tel. 039/3636.1  
The manufacturer reserves the right to change any product specifications without notice.  
March, 2006.  
Printed in Italy  

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