Carrier Air Conditioner Troubleshooting
Basic Troubleshooting
PROBLEM: Indoor unit emits a bad odor on start–up
POSSIBLE CAUSE:*Air filter dirty *Output air still has odor after cleaning filter
SOLUTION: *Clean the air filter *Contact your service representative
PROBLEM: You hear water flowing noise when the unit is running
POSSIBLE CAUSE:This is normal and is the refrigerant flowing through the system.
SOLUTION: No maintenance required
PROBLEM: Indoor unit produces a mist when the air conditioner is running
POSSIBLE CAUSE:This is normal cooling and is caused by high humidity and temperature in the room.
SOLUTION:No maintenance required. Mist should stop as room is cooled down and the humidity is removed
PROBLEM: Wireless remote control does not work
POSSIBLE CAUSE:*Batteries are dead. *Unit needs to be reset.
SOLUTION:*See battery replacement section in this manual and replace batteries.*Turn off power to indoor unit. Remove plug from wall and then reinsert plug. Restart unit.
PROBLEM: Water leaks into room from Indoor unit
POSSIBLE CAUSE:Condensing water has overflowed
SOLUTION:Check indoor condensing drain or call your representative.
PROBLEM: Unit/System Does Not Work
POSSIBLE CAUSE:
*To protect the unit upon an immediate restart after a stop, the system controller will delay the unit for 3 minutes before allowing the unit to start back up.
*The circuit breaker has tripped or a fuse has blown.
*Power failure.
*Error codes displayed
*Voltage is too low
SOLUTION:
*After turning unit off, wait at least 3 minutes before trying to restart.
*Reset the circuit breaker or replace the fuse with the specified replacement fuse.
*Restart operation when the power is restored.
*Call your service representative.
*Call your service representative.
PROBLEM: Cooling is Not Working Properly
POSSIBLE CAUSE:
*The filter is blocked with dust.
*Temperature is not set properly.
*A window or door is open.
*The outdoor unit is obstructed.
*The fan speed is too low.
*The operation mode is in Fan instead of Cool.
SOLUTION:
*Clean the air filter.
*Check the temperature and reset if necessary.
*Close the window or door.
*Remove the obstruction.
*Change the fan speed selection.
*Change the operating mode to Cool or reset the unit.
PROBLEM: Heating is Not Working
Properly
POSSIBLE CAUSE:
*The filter is blocked with dust.
*Temperature is set too low.
*A window or door is open.
*The outdoor unit is obstructed.
SOLUTION:
*Clean the air filter.
*Check the temperature and reset if necessary.
*Close the window or door.
*Remove the obstruction
PROBLEM: Unit Stops During Operation
POSSIBLE CAUSE:
*The Off timer is not operating correctly.
*Error codes displayed
SOLUTION:
*Restart the operating mode.
*Call your service representative.
38GVM Diagnostic Codes
[[[ 18,24 and 30K & 36 and 42K & Indoor Unit Display & Indoor and/or Outdoor Unit Error ]]]
NA & Defrost Mode 1 & 08 & Outdoor
NA & Defrost Mode 2 & 0A & Outdoor
Inlet tube temperature sensor malfunction & Inlet tube temperature sensor malfunction & See Error Code Table & Indoor
Outlet tube temperature sensor malfunction & Outlet tube temperature sensor malfunction & See Error Code Table & Indoor
Low charge or refrigeration system blockage & NA & F0 & Outdoor
Indoor return air temperature sensor malfunction & Indoor return air temperature sensor malfunction & See Error Code Table & Indoor
Indoor tube temperature sensor malfunction & Indoor tube temperature sensor malfunction & See Error Code Table & Indoor
Outdoor ambient temperature sensor malfunction & Outdoor ambient temperature sensor malfunction & F3 & Outdoor
NA & Outdoor mid-coil temperature sensor malfunction & F4 & Outdoor
Outdoor discharge air temperature sensor & Outdoor discharge air temperature sensor & F5 & Outdoor
Cooling oil return cycle & Cooling oil return cycle & F7 & Outdoor
System high pressure protection & System high pressure protection & E1 & Outdoor
Indoor freeze protection & Indoor freeze protection & E2 & Indoor
System low pressure protection & System low pressure protection & E3 & Outdoor
Compressor discharge high temperature protection & Compressor discharge high temperature protection & E4 & Outdoor
Communication error between indoor and outdoor & Communication error between indoor and outdoor & E6 & Indoor and outdoor
Mode conflict & Mode conflict & E7 & Indoor
System overload protection & System overload protection & E8 & Outdoor
Cold Blow Protection & NA & E9 & Indoor
Test mode & Test mode & dd & Outdoor
Pump down mode & Pump down mode & Fo & Outdoor
IPM Rest & IPM Rest & P0 & Outdoor
Compressor current protection & Compressor current protection & P5 & Outdoor
NA & Communication error between the inverter drive and main board & P6 Outdoor
Heat sink temperature sensor malfunction & Heat sink temperature sensor malfunction & P7 & Outdoor
IPM over temperature protection & IPM over temperature protection & P8 & Outdoor
NA & Open Contactor & P9 & Outdoor
Current sensor malfunction & Current sensor malfunction & Pc & Outdoor
NA & Current sensor mis-wiring protection & Pd & Outdoor
Input current protection & Input current protection & PA & Outdoor
NA & Inverter board ambient temperature sensor malfunction & PF & Outdoor
Low voltage protection & Low voltage protection & PL & Outdoor
High voltage protection & High voltage protection & PH & Outdoor
NA & Abnormal input AC voltage & PP & Outdoor
Capacitor charging malfunction & Capacitor charging malfunction & PU & Outdoor
Defrost or heating oil return cycle & Heating oil return cycle & H1 & Outdoor
NA & Forced defrost & H1 & Outdoor
Compressor overheat protection & Compressor overheat protection & H3 & Outdoor
IPM Protection & IPM Protection & H5 & —-
Compressor speed reduction & Compressor speed reduction & H7 & Outdoor
PFC board protection & PFC board protection & Hc & Outdoor
Compressor high voltage protection & NA & L9 & Outdoor
Compressor start-up failure & Compressor start-up failure & Lc & Outdoor
Compressor phase loss protection & Compressor phase loss protection & Ld & Outdoor
NA & Compressor stalling & LE & Outdoor
NA & Compressor over-speed protection & LF & Outdoor
NA & Condenser coil inlet temp sensor malfunction & A5 & Outdoor
NA & Condenser outlet temperature sensor malfunction & A7 & Outdoor
Memory card error & NA & EE & Outdoor
Frequency limitation for module circuit protection & NA & En & Outdoor
Frequency limitation for module temperature protection & NA & EU & Outdoor
Frequency limitation for overload protection & NA & F6 & Outdoor
Frequency limitation for system circuit protection & NA & F8 & Outdoor
Frequency limitation for module circuit protection & NA & F9 & Outdoor
Frequency limitation for freeze protection & NA & FH & Outdoor
Compressor demagnetizing protection & NA & HE & Outdoor
Indoor and outdoor units mismatch & NA & LP & Outdoor and Indoor
Compressor phase detection malfunction & NA & U1 & Outdoor
Low DC bus voltage & NA & U3 & Outdoor
Communication error between main board and EXV & Communication error between main board and EXV & dn & Outdoor
Error Code Table
13 Unit A indoor pipe outlet temperature sensor malfunction
14 Unit A indoor pipe inlet temperature sensor malfunction
15 Unit A Indoor return air sensor malfunction
16 Unit A mode conflict
17 Unit A freeze protection
23 Unit B indoor pipe outlet temperature sensor malfunction
24 Unit B indoor pipe inlet temperature sensor malfunction
25 Unit B Indoor return air sensor malfunction
26 Unit B mode conflict
27 Unit B freeze protection
33 Unit C indoor unit pipe outlet temperature sensor malfunction
34 Unit C indoor unit pipe inlet temperature sensor malfunction
35 Unit C Indoor unit return air sensor malfunction
36 Unit C mode conflict
37 Unit C freeze protection
41 Unit D communication error
42 Indoor return air temperature sensor malfunction
43 Unit D indoor pipe outlet temperature sensor malfunction
44 Unit D indoor pipe inlet temperature sensor malfunction
45 Unit D Indoor return air temperature sensor malfunction
46 Unit D mode conflict
47 Unit D freeze protection
51 Unit E communication error
52 Unit E indoor pipe midway temperature sensor malfunction
53 Unit E indoor pipe outlet temperature sensor malfunction
54 Unit E indoor pipe inlet temperature sensor malfunction
55 Unit E Indoor return air temperature sensor malfunction
56 Unit E mode conflict
57 Unit E freeze protection
C5 Jumper missing on replacement indoor board
