Webasto MultiControl Installation Instructions Manual page 13

Fault in connected UniBox with analogue heater
Error code Fault
Fed Overvoltage
F5d Temperature sensor fault
F12 Communication fault on the W bus
Fe7/Fe8 Flash
Fe9 Implausible signal from switching output SAU1
Fea Faulty feedback signal from the heater (ST)
Fec Jamming external control knob
F01 to F0F Heater fault
T84 Low voltage
Fault in a connected W bus heater
Error code Fault
F01 to FFE Heater fault
MultiControl | SmartControl | UniBox
Fault description
Supply voltage is above 36 V.
Temperature from the external sensor connected to
the UniBox cannot be read correctly.
Reading/writing from/to the internal memory has
failed.
The UniBox receives an implausible
signal.
The external control knob is pressed for longer than
10 seconds.
Please refer to the documentation on the heater.
Supply voltage is below 8V.
Fault description
Please refer to the documentation on the heater.
Fault remedy
Check vehicle electrical installation.
Check installation. Contact Technical Support/Cus-
tomer Service.
Check installation.
Contact Technical Support/Customer Service.
Check installation. Contact Technical Support/Cus-
tomer Service.
Check installation.
Check installation. Contact Technical Support/Cus-
tomer Service.
Contact Technical Support/Customer Service.
Recharge the battery and check the vehicle's electri-
cal installation
Fault remedy
Contact Technical Support/Customer Service.
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