Fault Lock-Out - Webasto Air Top 3500 ST Installation Instructions Manual

Air Top 3500 ST / Air Top 5000 ST
15

Fault lock-out

The control unit has identified errors on individual heater components
and faults during the operation.
The heater is shut down (fault lock-out) if:
– No or incorrect start
– Temperature sensor defective
– Overheating sensor interrupt or short circuit
– Overheating sensor installed incorrectly
– Glow plug interrupt or short circuit
– Fan motor overload or blocked
or short circuit or interrupt
– Error in the metering pump or overheating guard circuit (start phase
only)
– Undervoltage less than 10 V or overvoltage greater than 15 V and for
longer than 20 seconds (on 12 V heater)
– Undervoltage less than 20 V or overvoltage greater than 32 V and for
longer than 20 seconds (on 24 V heater)
– Control unit defective
– Overheating
The fuel supply is stopped if the heater overheats.
The heater continues to run in the same way as if it is switched off
manually.
After it stops the control unit will be set to fault lock-out.
The overheating is indicated by the indicator flashing 10 times. Rectify
the cause of the fault. To reset the fault switch the heater on and off
briefly (at least 2 seconds). If serious faults, such as overheating or no
start, occur frequently, the heater will be set to permanent fault lock-out
(F 12 or F 13) and cannot be restarted until it has been repaired by
Webasto-trained personnel.
15.1. Error code output
NOTE:
The error code is output if the heater is fitted with a control element after
an error has occurred by the switch-on indicator/error code indicator
flashing. After 5 seconds of fast flashing, the error code will be output by
a sequence of long flash pulses, the number of flashes is shown in the
table below.
If the heater is fitted with a combination timer, an error message will
appear on the display of the timer after a fault occurs:
F 00 Control unit error / incorrect parameter set /
warm start recognition
F 01 No start (after 2 attempts to start) / no flame formation
F 02 Flame failure (repeated >3)
F 03 Undervoltage or overvoltage
F 04 Premature flame recognition
F 06 Temperature sensor interrupt or
temperature sensor short-circuit
F 07 Metering pump interrupt or metering pump short circuit
F 08 Fan motor interrupt or fan motor short circuit
or fan motor overload or fan motor blocked
F 09 Glow plug interrupt or glow plug short circuit
F 10 Overheating / permanent heater lock-out
F 11 Overheating sensor interrupt or
overheating sensor short circuit
F 12 Heater lock-out
F 13 Heater lock-out permanent
F 14 Overheating sensor incorrect position
F 15 Setpoint generator interrupt
Fault lock-out
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