Webasto MultiControl Installation Instructions Manual page 13

Error with UniBox connected and analogue heater
Fault code Faults
Fed Supply voltage too high
F5d Temperature sensor error
F12 Communication error on the W-bus
Fe7/Fe8 Flash
Fe9 Signal from switch output SAU1 not plausible
Fea Faulty feedback signal from heater (ST)
Fec External control knob sticking
F01 to F0F Heater error
T5d UniBox temperature sensor error
T84 Operating voltage too low
Errors relating to a connected heater
Fault code Faults
F01 to F99 Heater error (analogue)
F01 to FFE
Heater error (W-bus)
H01 to Hxx
MultiControl | SmartControl
Fault description
Supply voltage exceeds 36V.
The temperature from the external sensor
connected to the UniBox cannot be read correctly.
Read/write from/to the internal memory failed.
The UniBox is receiving an implausible signal.
External control knob pressed for longer than
10 seconds.
Please look through the heater documentation.
The temperature from the external sensor
connected to the UniBox cannot be read correctly.
Supply voltage is less than 8V.
Fault description
See workshop manual for heater
Troubleshooting
Check car electrical installation.
Check installation. Contact Webasto service
workshop.
Check installation.
Contact Webasto service workshop.
Check installation. Contact Webasto service
workshop.
Check installation.
Check installation. Contact Webasto service
workshop.
Contact Webasto service workshop.
Check installation. Replace sensor if necessary.
Charge the battery and check car electrical instal-
lation.
Troubleshooting
Contact Webasto service workshop
13