81
TROUBLESHOOTING
OUTDOOR UNIT ERROR CODES
ClimateTalk
Fault Code
PCB LED
Display
Transmitted ClimateTalk
Message
Thermostat Fault
Probable Causes
Corrective Actions
35
E35
HIGH CURRENT
Board detected a high current condition.
●
Short circuit condition
●
Stop valve not completely open
●
Overcharge
●
Faulty control board
●
Faulty compressor
●
Check installation clearances.
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check refrigerant charge level; Adjust if needed
●
Replace control board if necessary
●
Check the compressor; Repair/replace if needed.
36
E36
STARTUP ERROR
The control encountered an abnormal
condition during the startup procedure.
●
Blocked/restricted condenser coil and/or
lines
●
The compressor wire is lost phase
●
Inconsistent compressor load
●
Faulty control board
●
Check and clean condenser coil and/or lines
●
Check the wire between control board and
compressor
●
Replace control board if necessary
37
E37
OD CTRL FAIL4
Indicates the control board may need to
be replaced.
●
Faulty control board
●
Replace control board if necessary
38
E38
COMP VOLTAGE
The control has detected a voltage
related issue with the compressor.
●
High or low voltage from supply
●
The compressor wire is lost phase
●
Faulty control board
●
Correct low/high line voltage condition; Contact local
utility if needed
●
Check the wire between control board and
compressor
●
Replace control board if necessary
39
E39
OD CTRL FAIL5
Indicates the control board may need to
be replaced.
●
Thermistors inoperable or improperly
connected
●
Faulty control board
●
Check the connection to thermistors; Repair/replace if
needed
●
Replace control board if necessary
40
E40
COMP MISMATCH
Control determines that its compressor
requirement is different than the
compressor capability.
●
Memory card not correct
●
Control board mismatch
●
Check memory card data vs. air conditioner model
●
Verify control board size vs. air conditioner model;
Replace control board if necessary
41
E41
LOW REFRIGERANT
The control has detected a low
refrigerant condition.
●
Refrigerant leak
●
Low refrigerant charge
●
Thermistors inoperable or not properly
connected
●
Test for system leaks using leak test procedure
●
Check refrigerant charge level; Adjust if needed
●
Checkthe connection to thermistor; Repair/replace if
needed
42
E42
LOW LINE VOLT
Control detects a low power supply
voltage condition.
●
Low line voltage supply
●
Check circuit breakers and fuses; Replace if needed
●
Verify unit is connected to power supply as specified
on rating plate
●
Correct low line voltage condition; Contact local utility
if needed
43
E43
HIGH LINE VOLT
Control detects a high power supply
voltage condition.
●
High line voltage supply
●
Verify unit is connected to power supply as specified
on rating plate
●
Correct high line voltage condition; Contact local
utility if needed
44
E44
OP TEMP RANGE
The control detects the outdoor
temperature outside recommended
operational range. Unit may continue to
operate normally.
●
Ambient air conditions too high or low
●
Cycle power; re-try during usable ambient
temperature range
45
E45
NO COOLING TEST
The control is unable to start the Cooling
mode test because indoor heat has been
turned on by thermostat. Please set
thermostat to off position.
●
Heat provided by secondary heating source
●
Turn off heater using thermostat before running AHRI
mode
47
E47
NO SYS VER TEST
The control is unable to start the System
Verification test because indoor heat has
been turned on by thermostat. Please
set thermostat to off position.
●
Heat provided by secondary heating source
●
Turn off heater using thermostat before operation
48
E48
NO PUMP DOWN
The control is unable to enter the Pump
Down Mode because indoor heat has
been turned on by thermostat. Please
set thermostat to off position.
●
Heat provided by secondary heating source
●
Turn off heater using thermostat before operation
49
E49
NO CHARGE MODE
The control is unable to enter Charging
Mode because indoor heat has been
turned on by thermostat. Please set
thermostat to off position.
●
Heat provided by secondary heating source
●
Turn off heater using thermostat before operation
50
E50
LINE VOLT CTRL
This indicates there is a voltage issue on
the control board. See service manual for
troubleshooting information.
●
High or low voltage from supply
●
Faulty control board
●
Correct low/high line voltage condition; Contact local
utility if needed
●
Replace control board if necessary
51
E51
OD COMM ERROR
This indicates potential communication
issues have been detected by the
outdoor control board.
●
Communication wiring disconnected
●
Check communication wiring; Repair as needed
52
-
COMP FAIL MINOR
This error indicates the equipment is
experiencing frequent compressor faults.
Control has determined continued
operation is acceptable. This indicates
they may be a problem with the
equipment.
●
Stop valve not completely open
●
The compressor wire is lost phase
●
Compressor motor failure
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check the wire between control board and
compressor
●
Inspect compressor motor for proper function;
Replace if necessary
