12
Status / Error message
Possible cause
Correction
A50
Fan inverter
Internal fan fault.
Please contact your authorised Webasto Marine dealer.
A51
PFC module inverter
Module fault. Excess current C1, C2: connections short-circuited.
A53
STO inverter
Internal module fault “Safe Torque Off”. No contact between "Safe Torque Off" connection and pc-board.
A54
STO inverter
No display on screen; compressor and sea water pump not running.
Fuse faulty or break/short-circuit in this electrical circuit.
Pc-board damaged by high voltage (RT1 blown).
Sea water pump(s) start up direct- ly after the control is switched on.
Wiring of pump 1 (sea water) and pump 2 (cold water) interchanged.
Please contact your authorised Webasto Marine dealer.
Compressor keeps cutting in and out.
Shortage of cold water.
No or insufficient cooling or heat- ing capacity.
Poor air or water flow, soiled or circulation blocked.
Secure adequate air or water flow (see A01 and/or A02).
Refrigerant shortage.
Please contact your authorised Webasto Marine dealer.
Oil block.
Refrigerant circuit blocked. (Filter or expansion valve).
Compressor fault.
Incorrect room/ambient tempera- ture or water temperature dis- played.
Temperature sensor positioned incorrectly, subject to interference or display values falsified.
Check whether the sensor is subject to direct fault sources such as direct sunlight or devices radiating heat. Please contact your author
-
ised Webasto Marine dealer.
Compressor not running.
The target temperature of the cold water is reached. No correction necessary: 0°C (cooling mode), 49°C (heating mode).
The system starts up on reaching a defined cold water temperature. Cut-in temperature:: 4°... 8°C (cooling mode), 41°... 45°C (heating mode).
Compressor defective or break/short-circuit in compressor wiring.
Please contact your authorised Webasto Marine dealer.
Compressor 2: Compressor overload or overload protection element on top of compressor defective.
Incorrect compressor settings.