www.stiebel-eltron.com WPM 3| 49
INSTALLATION
Troubleshooting
Fault display Reason for fault code being triggered Possible cause of fault / remedy
INV N ADC COMM Minor inverter fault: Communication between analogue/digital converter
and auxiliary processor is faulty.
Inverter fault
COMMUNICATION IWS INV N Low relevance communication objects have been incorrectly transferred
repeatedly between the IWS and inverter.
Inverter fault. Check wiring and associated plug-in con-
nectors; replace if faulty. Test inverter power supply.
COMMUNICATION IWS INV H High relevance communication objects have been incorrectly transferred
repeatedly between the IWS and inverter.
Inverter fault. Check wiring and associated plug-in con-
nectors; replace if faulty. Test inverter power supply.
INV H CENTRAL FAULT 1 INV major fault central fault 1 Inverter fault
INV H CENTRAL FAULT 2 INV major fault central fault 2 Inverter fault
INV N CENTRAL FAULT 1 INV minor fault central fault 1 Inverter fault
INV N CENTRAL FAULT 2 INV minor fault central fault 2 Inverter fault
8255 Major inverter fault: Input current limit Inverter fault
8256 Major inverter fault: Output current limit Inverter fault
8257 Major inverter fault: Phase loss Inverter fault
8258 Major inverter fault: Power module Inverter fault
8259 Major inverter fault: Mains voltage sensor Inverter fault
8260 Major inverter fault: Motor power offset Inverter fault
8261 Major inverter fault: PFC power offset Inverter fault
8262 Major inverter fault: Measure motor inductance Inverter fault
8263 Major inverter fault: Measure motor phase resistance Inverter fault
8264 Major inverter fault: Restart Inverter fault
8265 Major inverter fault: Motor excess current shutdown function Inverter fault
8266 Major inverter fault: IGBT US short circuit Inverter fault
8267 Major inverter fault: IGBT OS short circuit Inverter fault
8268 Major inverter fault: Motor phases short circuit Inverter fault
8269 Major inverter fault: SVM function Inverter fault
8270 Major inverter fault: Fan inverter excess current Inverter fault
8271 Major inverter fault: Fan SVM function Inverter fault
8272 Major inverter fault: Fan DC excess voltage Inverter fault
8273 Major inverter fault: Fan DC undervoltage Inverter fault
8274 Major inverter fault: Fan inverter excess temperature Inverter fault
8275 Major inverter fault: Fan rotor vector Inverter fault
8276 Major inverter fault: Fan motor excess speed Inverter fault
8277 Major inverter fault: Fan phase loss Inverter fault
8278 Major inverter fault: Fan power module Inverter fault
8279 Major inverter fault: Fan motor power offset Inverter fault
8280 Major inverter fault: Fan measure motor inductance Inverter fault
8281 Major inverter fault: Fan measure motor phase resistance Inverter fault
8282 Major inverter fault: Fan motor excess current shutdown function Inverter fault
8283 Major inverter fault: Fan IGBT US short circuit Inverter fault
8284 Major inverter fault: Fan IGBT OS short circuit Inverter fault
8285 Major inverter fault: Fan motor phases short circuit Inverter fault
8286 Minor inverter fault: Fan DC undervoltage Inverter fault
8287 Minor inverter fault: Fan Modbus faulty Inverter fault
8288 Minor inverter fault: Fan inverter low temperature Inverter fault
8289 Minor inverter fault: Fan intermediate circuit initialisation Inverter fault
8290 Minor inverter fault: Fan central fault 1 Inverter fault
8291
Low relevance communication objects have been incorrectly transferred
repeatedly between the IWS and inverter (fan section).
Inverter fault. Check wiring and associated plug-in con-
nectors; replace if faulty. Test inverter power supply.
8292
High relevance communication objects have been incorrectly transferred
repeatedly between the IWS and inverter (fan section).
Inverter fault. Check wiring and associated plug-in con-
nectors; replace if faulty. Test inverter power supply.
(8293) ERR T VER EIN IWS Sensor value of the evaporator inlet temperature sensor outside the per-
missible range
Check sensor, leads and the relevant plug-in connec-
tors, and replace if faulty”
8294 Minor inverter fault: Fan mains undervoltage Inverter fault
8295 Minor inverter fault: Fan motor excess temperature Inverter fault
8296 Major inverter fault: PFC excess current shutdown function Inverter fault
8297 Minor inverter fault: Inverter temperature control Inverter fault
8298 Minor inverter fault: Input current control Inverter fault
8299 Major inverter fault: High pressure sensor range undershot Inverter fault
8300 Major inverter fault: Compressor type configuration Inverter fault
8301 Major inverter fault: High pressure sensor configuration Inverter fault
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