80
TROUBLESHOOTING
OUTDOOR UNIT ERROR CODES
ClimateTalk
Fault Code
PCB LED
Display
Transmitted ClimateTalk
Message
Thermostat Fault
Probable Causes
Corrective Actions
22
E22
HI DISCH TEMP
This error indicates the equipment is
experiencing frequent high discharge
temperature faults.
Discharge thermistor is not put on
correct position.
●
Discharge thermistor inoperable or
improperly connected
●
Discharge thermistor is put on incorrect
position or off
●
Low refrigerant charge
●
Overcharge
●
Faulty compressor
●
Check discharge thermistor resistance and
connections; Repair/replace as needed
●
Check discharge thermistor position
●
Check refrigerant charge level; Adjust if needed
●
Check the compressor; Repair/replace if needed
23
E23
DISCH TEMP FAIL
The control has detected that the
Discharge Temperature Sensor is out of
range.
●
Discharge thermistor inoperable or
improperly connected
●
Check discharge thermistor resistance and
connections; Repair/replace as needed
24
E24
HPS OPEN
The high pressure switch is open.
●
High pressure switch (HPS) inoperable
●
Check resistance on HPS to verify operation; Replace
if needed
25
E25
AIR SENSOR FLT
The outdoor air temperature sensor is
open or shorted.
●
Faulty outdoor thermistor sensor or
disconnect
●
Inspect and test sensor; Replace sensor if needed
26
E26
PRESSURE SENSOR
The control determines that the pressure
sensor is not reacting properly.
●
Low pressure sensor inoperable or not
properly connected
●
Check the connection to low pressure sensor;
Repair/replace if needed
27
E27
COIL TEMP FAIL1
The control has detected that the
Outdoor Defrost Sensor is out of range.
●
Outdoor defrost thermistor inoperable or not
properly connected
●
Check the connection to OD defrost thermistor;
Repair/replace if needed
28
E28
COIL TEMP FAIL2
The control has detected that the
Outdoor Coil Temperature Sensor is out
of range.
●
Outdoor coil thermistor inoperable or not
properly connected
●
Check the connection to OD coil thermistor; Repair if
needed
29
E29
LIQ TEMP FAIL
The control has detected that the Liquid
Temperature Sensor is out of range.
●
Liquid thermistor inoperable or not properly
connected
●
Check the connection to liquid thermistor;
Repair/replace if needed
30
E30
OD CTRL FAIL3
Indicates the control board may need to
be replaced.
●
Wiring to control board disconnected
●
Faulty control board
●
Noise
●
Check wiring to control board; Repair as needed
●
Replace control board if necessary
32
E32
HI TEMP CTRL1
This error indicates the equipment is
experiencing high temperature faults on
the outdoor control board.
●
Ambient air conditions too high
●
Cooling bracket screw(s) missing or not
properly fastened
●
No or poor thermal grease coating between
cooling plumbing and cooling bracket on
control board
●
No flow or limited flow through control board
cooling circuit (potential restriction in line or
low refrigerant)
●
Stop valve not completely open
●
Cycle power; re-try during usable ambient
temperature range
●
Verify cooling bracket screws in place and secure;
Secure fasteners as needed
●
Check thermal grease inside cooling bracket on
control board; Apply additional grease as needed
●
Check for restriction in line
●
Check refrigerant charge level; Adjust if needed
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
33
-
HI TEMP CTRL2
This error indicates the equipment is
experiencing high temperature faults on
the outdoor control board. Control has
determined continued operation is
acceptable. This indicates they may be
a problem with the equipment.
●
Ambient air conditions too high
●
Cooling bracket screw(s) missing or not
properly fastened
●
No or poor thermal grease coating between
cooling plumbing and cooling bracket on
control board
●
No flow or limited flow through control board
cooling circuit (potential restriction in line or
low refrigerant)
●
Stop valve not completely open
●
Cycle power; re-try during usable ambient
temperature range
●
Verify cooling bracket screws in place and secure;
Secure fasteners as needed
●
Check thermal grease inside cooling bracket on
control board; Apply additional grease as needed
●
Check for restriction in line
●
Check refrigerant charge level; Adjust if needed
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
34
E34
CURRENT SPIKE
Board detected a high current condition.
This indicates the potential for a short
circuit.
●
Current spike in supply
●
Stop valve not completely open
●
The compressor wire is lost phase
●
Faulty control board
●
Faulty compressor
●
Check power supply for in-rush current during start-up
or steady state operation
●
Check the opening of stop valve, should be full open;
Repair/replace if needed
●
Check the wire between control board and
compressor
●
Replace control board if necessary
●
Check the compressor; Repair/replace if needed
