| Climate Talk Fault Code | Transmitted message | Dealer error message | Possible Causes | Corrective Actions | Alarm Status | Unit Type | Consumer error message |
| 11 | RUN SYS TEST | System Test required for start up | •Incomplete
SYSTEM TEST. •SYSTEM TEST is running. |
•MESSAGE ONLY. | Critical | AC & HP | System error |
| 12 | OD CTRL Fail 1 | General memory error | •High
electrical noise. •Faulty control board. |
•Replace control board if necessary. | Critical | AC & HP | System error |
| 13[1] | HI PRESSURE C | Experiencing frequent high pressure faults | •Blocked/restricted
condenser coil and /or lines. •Stop valve not completely open. •Overcharged. •Outdoor fan not running. •High pressure switch (HPS) inoperable. •Faulty indoor EEV or TXV. •Faulty indoor EEV coil. •Faulty control board. •DV**PEC air handler is connected with DX20VC0**1AA or AB. |
•Check
and clean condenser coil and/or lines. •Check the opening of stop valve, should be fully open; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Check outdoor fan motor & wiring; Repair/replace if needed. •Check indoor EEV or TXV; Replace if needed. •Check indoor EEV coil; Replace if needed. •Replace control board if necessary. •Replace indoor unit with TXV applicable indoor unit. |
Critical | AC & HP | Pressure error |
| 14[2] | HI PRESSURE M | Experiencing frequent high pressure faults but acceptable to run | •Blocked/restricted
condenser coil and/or lines. •Stop valve not completely open. •Overcharged. •Outdoor fan not running. •High pressure switch (HPS) inoperable. •Faulty indoor EEV or TXV. •Faulty indoor EEV coil. •Faulty control board. •DV**PEC air handler is connected with an incompatible model. |
•Check
and clean condenser coil and/or lines. •Check the opening of stop valve, should be fully open; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Check outdoor fan motor & wiring; Repair/replace if needed. •Check indoor EEV or TXV; Replace if needed. •Check indoor EEV coil; Replace if needed. •Replace control board if necessary. •Check high pressure switch; Replace if necessary. •Replace indoor unit with TXV applicable indoor unit. |
minor | AC & HP | Pressure error |
| 15 | LOW PRESSURE C | Frequent low pressure faults | •Stop
valve not completely open. •Restriction in refrigerant lines. •Low refrigerant charge. •Refrigerant leak. •Low pressure sensor inoperable or not properly connected. •Indoor fan motor not functioning correctly. •Faulty indoor EEV or TXV. •Faulty indoor EEV coil. •Faulty Control board •DV**PEC air handler is connected with an incompatible model. |
•Check
the opening of stop valve, should be fully open; Repair/replace if
needed. •Check for restrictions in refrigerant line; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Test for system leaks using leak test procedure. •Check the connection to low pressure sensor; Repair/replace if needed. •Check indoor EEV or TXV; Replace if needed. •Check indoor EEV coil; Replace if needed. •Check indoor blower motor & wiring; Repair/replace if needed. •Replace control board if necessary. •Replace indoor unit with TXV applicable indoor unit. |
Critical | AC & HP | Pressure error |
| 16 | LOW PRESSURE M | Frequent low pressure faults | •Stop
valve not completely open. •Restriction in refrigerant lines. •Low refrigerant charge. •Refrigerant leak. •Low pressure sensor inoperable or not properly connected. •Indoor fan motor not functioning correctly. •Faulty indoor EEV or TXV. •Faulty indoor EEV coil. •Faulty Control board •DV**PEC air handler is connected with an incompatible model. |
•Check
the opening of stop valve, should be fully open; Repair/replace if
needed. •Check for restrictions in refrigerant line; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Test for system leaks using leak test procedure. •Check the connection to low pressure sensor; Repair/replace if needed. •Check indoor EEV or TXV; Replace if needed. •Check indoor EEV coil; Replace if needed. •Check indoor blower motor & wiring; Repair/replace if needed. •Replace control board if necessary. •Replace indoor unit with TXV applicable indoor unit. |
minor | AC & HP | Pressure error |
| 17 | COMPRESSOR FAIL | Frequent compressor faults | •Stop
valve not completely open. •The compressor wire has lost phase. •Compressor motor failure. |
•Check
the opening of stop valve, should be fully open; Repair/replace if
needed. •Check the wire between control board and compressor. •Inspect compressor motor for proper function; Replace if necessary. |
Critical | AC & HP | System error |
| 18 | Outdoor control board error | •Outdoor
fan motor not connected properly. •Faulty control board. •Noise. |
•Check
wiring from outdoor fan motor to control board; Repair if needed. •Replace control board if necessary. |
Critical | AC & HP | System error | |
| 19 | Outdoor unit PCB or fan failure error | •Obstruction
in fan rotation. •Outdoor fan motor not connected properly. •Outdoor fan not running. •Faulty control board. •Noise. |
•Check
and clean grille of any debris. •Check wiring from outdoor fan motor to control board; Repair if needed. •Check outdoor fan motor & wiring; Repair/replace as needed. •Replace control board if necessary. |
Critical | AC & HP | System error | |
| 20 | EEV coil is not connected | •Outdoor
EEV coil is not connected. •Faulty outdoor EEV coil. |
•Check outdoor EEV coil connection; Repair/replace as needed. | Critical | AC & HP | System error | |
| 21[3] | EEV CTRL FAIL | Experiencing frequent low discharge superheat faults | •Thermistors
inoperable or improperly connected. •Faulty indoor EEV coil. •Faulty indoor EEV or TXV. •Faulty outdoor EEV coil. •Faulty outdoor EEV. •Overcharged. •Faulty pressure sensor. •Faulty control board. •DV**PEC air handler is connected with an incompatible model. |
•Check
the connection to thermistors; Repair/replace if needed. •Check indoor EEV coil; Repair/replace if needed. •Check indoor EEV or TXV; Repair/replace if needed. •Check outdoor EEV coil; Repair/replace if needed. •Check outdoor EEV; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Check pressure sensor; Repair/replace if needed. •Replace control board if necessary. •Replace indoor unit with TXV applicable indoor unit. |
Critical | AC & HP | System error |
| 22 | Hi discharge temperature error | •Discharge
thermistor inoperable or improperly connected. •Discharge thermistor is set to incorrect position or off. •Low refrigerant charge. •Overcharged. •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. |
Critical | AC & HP | Sensor error | |
| 23 | discharge temperature sensor failure | •Discharge thermistor inoperable or improperly connected. | •Check discharge thermistor resistance and connections; Repair/replace as needed. | Critical | AC & HP | Sensor error | |
| 24 | HPS OPEN | High pressure switch is open | •High pressure switch (HPS) inoperable. | •Check resistance on HPS to verify operation; Replace if needed. | Critical | AC & HP | Pressure error |
| 25 | Outdoor temperature sensor error | •Faulty or disconnected outdoor thermistor sensor. | •Inspect and test sensor; Replace sensor if needed. | Critical | AC & HP | Sensor error | |
| 26[4] | PRESSURE SENSOR | Pressure sensor not reacting properly | •Low pressure sensor inoperable or not properly connected. | •Check the connection to low pressure sensor; Repair/replace as needed. | Critical | AC & HP | Pressure error |
| 27 | Outdoor defrost sensor error | •Outdoor defrost thermistor inoperable or not properly connected. | •Check the connection to outdoor defrost thermistor; Repair as needed. | Critical | AC & HP | Sensor error | |
| 28 | Outdoor coil temperature sensor error | •Outdoor coil thermistor inoperable or not properly connected. | •Check the connection to outdoor coil thermistor; Repair/replace if needed. | Critical | AC & HP | Sensor error | |
| 29 | Liquid temperature sensor error | •Liquid thermistor inoperable or not properly connected. | •Check the connection to liquid thermistor; Repair/replace if needed. | Critical | AC & HP | Sensor error | |
| 30[5] | OD CTRL FAIL 3 | 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. |
Critical | AC & HP | Communication error |
| 31 | High current leak | •Improper
ground. •Faulty compressor. |
•Check
ground screws/lugs and wiring; Repair/replace if needed. •Check the compressor. Repair/replace if needed. |
Critical | AC & HP | Safety error | |
| 32 | Outdoor unit control board high temperature fault | •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; retry during usable ambient temperature range. •Verify cooling bracket screws in place and secure; Secure fasteners as needed (2-4 ton only). •Check thermal grease inside 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 fully open; Repair/replace if needed (2-4 ton only). |
Critical | AC & HP | Sensor error | |
| 33 | Outdoor unit control board high temperature fault but acceptable to run | •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; retry during usable ambient temperature range. •Verify cooling bracket screws in place and secure; Secure fasteners as needed (2-4 ton only). •Check thermal grease inside 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, it should be fully open; Repair/replace if needed (2-4 ton only). |
minor | AC & HP | Sensor error | |
| 34 | Outdoor unit PCB detected a possible short circuit | •Current
spike in supply. •Stop valve not completely open. •The compressor wire has lost phase. •Faulty control board. •Faulty compressor. |
•Check
power supply for inrush current during start up or steady state
operation. •Check the opening of stop valve, should be fully 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. |
Critical | AC & HP | Safety error | |
| 35 | Outdoor unit PCB detected a high current condition | •Short
circuit condition. •Stop valve not completely open. •Overcharged. •Faulty control board. •Faulty compressor. |
•Check
installation clearances. •Check the opening of stop valve, should be fully open; Repair/replace if needed. •Check refrigerant charge level; Adjust if needed. •Replace control board if necessary. •Check the compressor; Repair/replace if needed. |
Critical | AC & HP | Safety error | |
| 36 | STARTUP ERROR | Startup procedure error | •Blocked/Restricted
condenser coil and/or lines. •The compressor wire has lost phase. •Inconsistent compressor load. •Faulty control board. |
•Check
and clean condenser coil and/or lines. •Check the wiring between control board and compressor. •Replace control board if necessary. |
Critical | AC & HP | System error |
| 37 | OD CTRL FAIL 4 | Control board error | •Outdoor
fan motor not connected properly. •Faulty control board. |
•Check
wiring from outdoor fan motor to control board; Repair if needed. •Replace control board if necessary. |
Critical | AC & HP | System error |
| 38 | Compressor voltage error | •High
or low voltage from supply. •The compressor wire has 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. |
Critical | AC & HP | System error | |
| 39[6] | OD CTRL FAIL 5 | 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. |
Critical | AC & HP | System error |
| 40[7] | COMP MISMATCH | Compressor requirement is different than the 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. |
Critical | AC & HP | System error |
| 41 | LOW REFRIGERANT | Low refrigerant condition error | •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. •Check the connection to the thermistor; Repair/replace if needed. |
Critical | AC & HP | System error |
| 42[8] | LOW LINE VOLT | Low power supply voltage condition detected | •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. |
Critical | AC & HP | Safety error |
| 43[9] | HIGH LINE VOLT | High power supply voltage condition detected | •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. |
Critical | AC & HP | Safety error |
| 44 | Recommended outdoor operational temperature is out of range | •Ambient air conditions too high or low. | •Cycle power; retry during usable ambient temperature range. | minor | AC & HP | System error | |
| 45 | NO COOLING TEST | Cooling mode test error | •Heat provided by secondary heating source. | •Turn off heater using thermostat before running AHRI mode. | Critical | AC & HP | System error |
| 46[10] | NO HEATING TEST | Unable to start heating mode test. Set thermostat to off position | •Heat provided by secondary heating source. | •Turn off heater using thermostat before running AHRI mode. | Critical | AC & HP | System error |
| 47[11] | NO SYS VER TEST | Unable to start system verification test. Set thermostat to off position | •Heat provided by secondary heating source. | •Turn off heater using thermostat before operation. | Critical | AC & HP | System error |
| 48[12] | NO PUMP DOWN | Unable to enter pump down mode. Set thermostat to off position | •Heat provided by secondary heating source. | •Turn off heater using thermostat before operation. | Critical | AC & HP | System error |
| 49[13] | NO CHARGE MODE | Unable to enter charging mode. Set thermostat to off position | •Heat provided by secondary heating source. | •Turn off heater using thermostat before operation. | Critical | AC & HP | System error |
| 50[14] | LINE VOLT CTRL | Voltage issue on the control board. See manual for troubleshooting info | •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. |
Critical | AC & HP | Safety error |
| 51[15] | OD COMM ERROR | Potential communication issues have been detected by the outdoor control board | •Communication wiring disconnected. | •Check communication wiring; Repair as needed. | Critical | AC & HP | Communication error |
| 52[16] | COMP FAIL MINOR | Experiencing frequent compressor faults but acceptable to run | •Stop
valve not completely open. •The compressor wire has lost phase. •Compressor motor failure. |
•Check
the opening of stop valve, should be fully open; Repair/replace if
needed. •Check the wire between control board and compressor. •Inspect compressor motor for proper function; Replace if necessary. |
minor | AC & HP | System error |
| 53 | PCB OR FAN MIN | Frequent outdoor faults | •Obstruction
in fan rotation. •Outdoor fan motor not connected properly. •Outdoor fan not running. •Faulty control board. •Noise. |
•Check
and clean grille of any debris. •Check wiring from outdoor fan motor to control board; Repair if needed. •Check outdoor fan motor & wiring; Repair/replace as needed. •Replace control board if necessary. |
minor | AC & HP | System error |
| 54 | EEV MINOR | Experiencing frequent low discharge superheat faults but acceptable to run | •Thermistors
inoperable or improperly connected. •Faulty indoor EEV or TXV or indoor EEV coil. •Faulty control board. •DV**PEC air handler is connected with an incompatible model. |
•Check
the connection to thermistors; Repair/replace if needed. •Check indoor EEV or TXV; Replace if needed. •Check indoor coil; Replace if needed. •Replace control board if necessary. •Replace indoor unit with TXV applicable indoor unit. |
minor | AC & HP | System error |
| 55 | Frequent low discharge superheat faults but acceptable to run | •Discharge
thermistor inoperable or improperly connected. •Discharge thermistor is set to incorrect position or off. •Low refrigerant charge. •Overcharged. •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. |
minor | AC & HP | System error | |
| 56 | Suction temperature sensor failure | •Suction thermistor inoperable or not properly connected | •Check
the connection to suction thermistor; Repair/replace if needed •Check for obstruction inside duct work |
Critical | AC & HP | Sensor error | |
| 57 | Control is sensing sweating on the cooling loop | •Refrigerant
leak. •Low refrigerant charge. •Thermistors inoperable or not properly connected. •Faulty indoor EEV or indoor EEV coil. |
•Test
for system leaks using leak test procedure. •Check refrigerant charge level; Adjust if needed. •Check the connection to the thermistor; Repair/replace if needed. •Chesk indoor EEV; Replace if needed. •Check indoor EEV coil; Replace if needed. |
minor | AC & HP | System error | |
| 58 | Compressor overload protection sensor is open | •Overload protection (OL) sensor is inoperable | •Check
resistance on OL sensor to verify operation; Replace if needed. •Check OL sensor position on compressor body. |
Critical | AC & HP | System error | |
| 59 | Equipment is experiencing reversing valve faults | •Faulty
reversing valve body or coil. •Low refrigerant charge. •Faulty pressor sensor. •Faulty control board. |
•Check
reversing valve body or coil; Replace if needed •Check refrigerant charge level; Adjust if needed. •Check pressor sensor; Replace if needed. •Replace control board if necessary. |
Critical | AC & HP | System error | |
| 60 | The heat pump is recovering from a sudden loss of power | •While heating with heat pump there was a sudden loss of power | •Check
for proper voltage to HP •If immediate heat is required run in cool mode for 5 minutes then switch back to heat mode. |
minor | AC & HP | System error | |
| 60 | The heat pump is recovering from a sudden loss of power | •While in heat mode there was a sudden loss of power | •Check
for proper voltage to HP •If immediate heat is required run in cool mode for 5 minutes then switch back to heat mode. |
Critical | AC & HP | System error | |