De Dietrich UMS20 + MOSE20 Notice D'installation Et D'entretien page 130

en
8 Troubleshooting
Error code Description
F0 Fault with the fan motor on the outdoor unit (DC motor)
F1 Fault with the inverter module protection (IPM)
F2 Fault with the outdoor unit board protection (PFC) condenser
F3 Fault with the compressor synchronism
F4 Fault with the discharge temperature sensor
F5 Fault with the overheating protection on the compressor
F6 Fault with the outdoor temperature sensor
F7 Fault with the over-voltage or low voltage protection
F8 Communication fault between the outdoor unit and the outdoor unit control board unit
F9 Fault with the outdoor unit EPROM
FA Suction sensor error
Fb Floor standing motor error.
P2 High-pressure switch protection
P3 Lack of refrigerant protection
P4 Condenser overload protection (cooling mode)
P5 Discharge temperature protection
P6 Evaporator overload protection (heating mode)
P7 Indoor unit freeze protection (cooling mode)
P8 Outdoor unit overcurrent protection
1
2
Tab.92 Outdoor unit error codes
LED 1 LED 2
130
Additional information regarding the errors is given via the LEDs on the
outdoor unit PCB :
1. Check the LED signals and refer to following table for error
2. Remove the panel of the PCB support.
3. Check signals on the LED.
LED representation:
MW-6020074-01
LED 3 Error name
Normal (outdoor unit standby)
Normal (compressor running)
Forced service (test mode)
Module protection error
Compressor out-of-step error
Exhaust air sensor error
description.
OFF
ON
Flashing
Probable Trouble Location
Normal, all three lights off for standby status.
Normal, all three lights flash while compressor
running.
Normal
Power voltage, compressor cable, reactor, mod­
ule panel, main external control panel, compres­
sor.
Power voltage, compressor cable, module panel,
main external control panel, compressor.
System pressure, exhaust air sensor, main exter­
nal control panel.
7797831 - v04 - 07122022