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

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