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YHM Fault Codes

Article ID: 331
Last updated: 25 Sep, 2017

York Heat Pump: YHM

Re: Fault Codes

The fault and status codes for the YHM heat pump are displayed on the small control board mounted beneath the large inverter board.

LED Seg 1 Seg 2 Description
Solid 0 0 Control Failure
Operational Faults
Solid 0 1 Hi Pressure Fault (not in lockout)
2 0 2 Hi Pressure Soft Lockout (last mode HP)
3 0 2 Hi Pressure Hard Lockout (last mode HP)
2 0 3 Hi Pressure Soft Lockout (last mode defrost)
3 0 3 Hi Pressure Hard Lockout (last mode defrost)
2 0 4 Low Pressure Soft Lockout
3 0 4 Low Pressure Hard Lockout
Solid 0 6 Low Voltage (less than 19.2V)
Solid 0 7 Low Voltage (less than 16V)
Solid 0 8 Inverter Communication Fault
Sensor/Switch Faults
Solid 0 9 OD Sensor Failure (Short)
Solid 1 0 OD Sensor Failure (Open)
Solid 1 1 Liquid Line Sensor Failure (Short)
Solid 1 2 Liquid Line Sensor Failure (Open)
Solid 1 3 Discharge Sensor Failure (Short)
Solid 1 4 Discharge Sensor Failure (Open)
Solid 1 5 Hi Discharge Temperature
Solid 1 6 Low Discharge Temperature
Wiring-Related Faults
Solid 1 8 "O" Received in AC-Only Mode
Solid 1 9 "W" Received in Cooling Mode
Solid 2 0 "W" and "O" Received in AC-Only Mode
Solid 2 4 "W" and "O" Received in Cooling Mode
Mismatch Speed Faults
Solid 2 5 Compressor Start Failure
Solid 2 6 OD Fan Start Failure
Operating Threshold Errors
Solid 2 7 OD Temperature 109 - 125 deg. (Cool Mode)
Solid 2 8 OD Temperature > 125 deg. (Cool Mode)
Solid 2 9 OD Temperature < 35 deg. (Cool Mode)
Inverter - Major Faults
Solid 3 1 Compressor Inverter Fault
Solid 3 2 Fan Inverter Fault
Solid 3 3 Loss of Communication with Inverter
Solid 3 4 DC Over-Voltage
Solid 3 5 DC Under-Voltage
Solid 3 6 Compressor Inverter Over-Current
Solid 3 7 IPM Over-Temperature
Solid 3 8 DC Over-Voltage - IPM
Solid 3 9 DC Under-Voltage - IPM
Solid 4 0 Compressor Speed Mis-Alignment
Solid 4 1 Phase Lost Detected by Speed
Solid 4 2 Phase Lost Detected by Current
Solid 4 3 Compressor IPM Fault - by IGBT Voltage
Solid 4 4 inverter PWM Logic Error
Solid 4 5 Inverter PWM Initialization Error
Solid 4 6 Compressor Inverter Shunt Resistor Unbalanced
Solid 4 7 Fan Inverter IPM Fault
Solid 4 8 Fan Inverter Misalignment 7 Locked Rotor
Solid 4 9 Fan Inverter Phase Lost
Solid 5 0 Fan Inverter DC bus under/over voltage
Solid 5 1 Fan Inverter Over Current
Solid 5 2 Compressor IPM Fault - by Low IGBT Voltage
Solid 5 3 Analog Digital Converter Offset Error
2 5 4 Inverter Drive Soft Lockout (3 faults in 30 min)
3 4 4 Inverter Drive Hard Lockout (4 soft lockouts in 2 hrs)
Solid 5 6 Crankcase Heater Fault
Inverter Minor Faults
Solid 6 0 IPM Over-Temperature (Speed Limiting)
Solid 6 1 DC Low Voltage (Speed Limiting)
Solid 6 2 Compressor Over-Current (Speed Limiting)
Solid 6 3 DC Voltage Low (Speed Reducing)
Solid 6 4 Compressor Over-Current (Speed Reducing)
Solid 6 5 IPM Over-Temperature (Speed Reducing)

 

 

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Article ID: 331
Last updated: 25 Sep, 2017
Revision: 9
Views: 2782
Comments: 0