TROUBLESHOOTING
68
ClimateTalk
Fault Code
Control Board
LED Display
Transmitted Climate
Talk Message*1
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 Sens or is out of
range.
• Discharge thermistor inoperable or
improperly connected
• Che
ck 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 resis tance on HPS to verify
operation; Replace if needed
25 E25 AIR SENSOR FLT
The outdoor air temperature sensor is
open
• 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 pres sure
sensor;
Repair/replace if needed
27 E27 COIL TEMP FAIL1
The control detects that the Outdoor
Defrost Sensor is out of range
• Outdoor defrost the
rmistor inoperable or
not properly connected
• Check the connection to OD defrost
thermistor; Repair/replace as 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/replace if needed
29 E29 LIQ TEMP FAIL
The control has detected that the Liquid
Temperat
ure 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
31 E31 HI LEAK CURRENT
The control has detected
high leakage
current (high voltage).
• Improper ground
• Faulty compressor
• Check ground screws/lugs and wiring;
Repair/replace if needed
• Check the compressor; Repair/replace if
needed
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 (2-4 ton only)
• No or poor the
rmal grease coating
between cooling plumbing and cooling
bracket on control board (2-4 ton only)
• Outdoor fan low speed (5 ton only)
• No flow or limited flow through control
board cooling circuit (potential restriction
in line or low refrigerant) (2-4 ton only)
• Stop valve not completely open (2-4 ton
only)
• Cycle power; re-try during usable
ambient temperature range
• Verify cooling bracket screws in place
and secure;
Secure fasteners as needed (2
4 ton only)
• Check thermal grease ins ide cooling
bracket on control board; Apply
additional grease as needed
• Check outdoor fan motor & wiring;
Repair/replace if needed (5 ton only)
• Check for restriction in line
• Check refrigerant charge level; Adjust if
needed (2-4 ton only)
• Check the opening of stop valve, should
be full open;
Repair/replace if needed (2-4 ton only)
33 - HI TEMP CTRL2
This error indicates the equ
ipment 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 (2-4 ton only)
• No or poor thermal grease coating
between cooling plumbing and cooling
bracket on control board (2-4 ton only)
• Outdoor fan low
speed (5 ton only)
• No flow or limited flow through control
board cooling circuit (potential restriction
in line or low refrigerant) (2-4 ton only)
• Stop valve not completely open (2-4 ton
only)
• Cycle power; re-try during usable
ambient temperature range
• Verify cooling bracket screws in place
and secure; Secure fasteners as needed (2
4 ton only)
• Check thermal grease ins ide cooling
bracket on control board; Apply
additional grease as needed
• Check outdoor fan motor & wiring;
Repair/replace if needed (5 ton only)
• Check for restriction in line
• Check refrigerant charge level; Adjust if
needed (2-4 ton only)
• Check the opening of stop valve, should
be full open;
Repair/replace if needed (2-4 ton only)
34 E34 CURRENT SPIKE
Control board a high curren
t 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 con
trol board if necessary
• Check the compressor; Repair/replace if
needed
35 E35 HIGH CURRENT
Control board detected a high current
condition.
• Short circuit condition
• Stop valve not completely open
• Overcharge
• Faulty control board
• Faulty compressor
• Check ins tallation clearances.
• Check the opening of stop valve, should
be full open; Repair/replace if needed
• Check refrigerant charge level; Adjust if
needed
• Replace c
ontrol board if necessary
• Check the compressor; Repair/replace if
needed.
(*1) This message is displayed when using the CTK04 thermostat.
OUTDOOR UNIT ERROR CODES
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