STIEBEL ELTRON WPM 3

48 | WPM 3 www.stiebel-eltron.com
INSTALLATION
Troubleshooting
Fault display Reason for fault code being triggered Possible cause of fault / remedy
ERR T OIL S IWS Sensor value of the oil sump temperature sensor outside the permissible
range
Check sensor, leads and the relevant plug-in connec-
tors, and replace if faulty.
ERR ND SENSOR Sensor value of the low pressure sensor outside the permissible range Check sensor, leads and the relevant plug-in connec-
tors, and replace if faulty.
ERR MD SENSOR Sensor value of the mean pressure sensor outside the permissible range Check sensor, leads and the relevant plug-in connec-
tors, and replace if faulty.
ERR HD SENSOR Sensor value of the high pressure sensor outside the permissible range Check sensor, leads and the relevant plug-in connec-
tors, and replace if faulty.
INV N DSP AFTER COMM Minor inverter fault: Communication between signal processor and main
processor is faulty.
Inverter fault
INV N COMM AFTER DSP Minor inverter fault: Communication between signal processor and main
processor is faulty.
Inverter fault
INV N SCROLL LOW TEMP Minor inverter fault: Temperature sensor fault, scroll temperature below
the permissible range.
Inverter fault
INV N MOTOR LOW TEMP Minor inverter fault: Temperature sensor fault, motor temperature below
the permissible range.
Inverter fault
INV N BOARD LOW TEMP Minor inverter fault: Temperature sensor fault, internal switching circuit
temperature below the permissible range.
Inverter fault
INV N INV LOW TEMPERATURE Minor inverter fault: Temperature sensor fault, inverter IGBTs below the
permissible range.
Inverter fault
INV N PFC LOW TEMPERATURE Minor inverter fault: Temperature sensor fault, PFC IGBTs below the per-
missible range.
Inverter fault
INV N FAULT LIMIT FATAL Minor inverter fault: Inverter fault limit has been achieved and inverter
was interlocked.
Inverter fault
SOA ND UNDERSHOT Low pressure below SOA ND limit for impermissible length of time. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
SOA ND EXCEEDED Low pressure exceeds SOA ND limit for impermissible length of time. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
SOA ND ALLOCATION SOA range exceeded. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
SOA HD UNDERSHOT High pressure below SOA HD limit for impermissible length of time. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
SOA HD EXCEEDED High pressure exceeds SOA HD limit for impermissible length of time. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
SOA HD ALLOCATION SOA range exceeded. Refrigerant circuit cannot adjust operating conditions
to SOA range for compressor.
INV H INV EXCESS CURRENT Major inverter fault: Inverter IGBT excess current. Inverter fault
INV H PFC EXCESS CURRENT Major inverter fault: PFC IGBT excess current. Inverter fault
INV H DC EXCESS VOLTAGE Major inverter fault: DC intermediate circuit excess voltage. Inverter fault
INV H DC UNDERVOLTAGE Major inverter fault: DC intermediate circuit undervoltage. Inverter fault
INV H AC EXCESS VOLTAGE Major inverter fault: AC input excess voltage. Inverter fault
INV H AC UNDERVOLTAGE Major inverter fault: AC input undervoltage. Inverter fault
INV H AC VOLTAGE BALANCE Major inverter fault: Voltage differences between the three input phases. Inverter fault
INV H DESATURATION Major inverter fault: Desaturation Inverter fault
INV H INV EXCESS TEMP Major inverter fault: Inverter IGBTs excess temperature. Inverter fault
INV H PFC EXCESS TEMP Major inverter fault: PFC IGBTs excess temperature. Inverter fault
INV H ROTOR VECTOR Major inverter fault: Rotor does not turn as expected. Inverter fault
INV H ARITHMETIC Major inverter fault: Arithmetic fault in the measuring and analysis pro-
cess.
Inverter fault
INV H INPUT RELAY OPEN Major inverter fault: Input relay open. Inverter fault
INV H INV CURRENT BALANCE Major inverter fault: Current differences between the three inverter
IGBTs.
Inverter fault
INV H PFC CURRENT BALANCE Major inverter fault: Current differences between the three PFC IGBTs. Inverter fault
INV H SELV RANGE EXT Major inverter fault: LV range exceeded. Inverter fault
INV H MOTOR EXCESS SPEED Major inverter fault: Motor excess speed. Inverter fault
INV N DC UNDERVOLTAGE Minor inverter fault: DC intermediate circuit undervoltage. Inverter fault
INV N TORQUE LIMIT Minor inverter fault: Torque limit achieved. Inverter fault
INV N MODBUS ERROR Minor inverter fault: Modbus communication is faulty. Inverter fault
INV N SCROLL EXCESS TEMP Minor inverter fault: Compressor scroll excess temperature. Inverter fault
INV N MOTOR EXCESS TEMP Minor inverter fault: Compressor motor excess temperature. Inverter fault
INV N BOARD EXCESS TEMP Minor inverter fault: Switching circuit excess temperature. Inverter fault
INV N INV EXCESS TEMP Minor inverter fault: Inverter IGBTs excess temperature. Inverter fault
INV N PFC EXCESS TEMP Minor inverter fault: PFC IGBT excess temperature. Inverter fault
INV N INV TEMP BALANCE Minor inverter fault: Temperature differences between the three inverter
IGBTs.
Inverter fault
INV N PFC TEMP BALANCE Minor inverter fault: Temperature differences between the three PFC
IGBTs.
Inverter fault