Unit installation

26
VW T5
Shut-down on fault
Faults in individual heater unit components and malfunctions during the entire operation are recog-
nized in the control unit.
The heater unit is shut down (fault lock-out) if:
- No or faulty start-up
- Temperature sensor defective
- Open or short circuit in overheating sensor
- Overheating sensor mounted incorrectly
- Break or short circuit in glow element
- Fan motor overloaded, blocked, short circuit or open circuit
- Fault in metering pump circuit or overheating protection (only during start-up phase)
- Undervoltage < 10.5 V or overvoltage >16 V and longer than 20 sec. (on heater unit with 12 V)
- Undervoltage < 21 V or overvoltage >32 V and longer than 20 sec. (on heater unit with 24 V)
- Control unit defective
-Overheating
- Flame detector (only on gasoline heater units)
In case of overheating, the fuel feed is interrupted. A run-on is carried out as with manual shut-down.
Following the run-on, the heater unit is in the fault lock-out mode. The overheating is indicated by the
operation indicator flashing 10 times.
Eliminate fault cause.
For fault release, briefly switch the heater unit off and then on again (at least 2 sec.).
If serious malfunctions, such as overheating, or no start-up occurs increasingly frequently, then the
heater unit is permanently locked (F12 or F13) and can only be returned to operation following repairs
by specially trained Webasto experts.
Fault code output:
Note:
When equipped with a heater control, fault code output is carried out after a malfunction occurs by the
switch-on check/fault code display flashing. After 5 rapid flashing pulses, the fault code output is carried
out with a sequence of long flashing pulses in accordance with the numbers in the table below. When
equipped with a combination timer, a fault output appears in the display of the digital timer after a fault
occurs. When using the heater control, the fault number is indicated by the operating indicator lamp
flashing:
Display Fault Code
Legend for
Fault Code
Output
F00 Control unit fault/incorrect data record/customer bus faulty
F01 No start-up (after 2 starting attempts)/no flame formation
F02 Flame failure (repeated >3)
F03 Undervoltage or overvoltage
F04 Premature flame detection
F05 Flame detector (gasoline heater unit) open or short circuit
F06 Open or short circuit in temperature sensor
F07 Open or short circuit in metering pump
F08 Open circuit, short circuit, overloading or blocking in fan motor
F09 Break or short circuit in glow element
F10 Overheating: As a result, continuous heater unit lock-out
F11 Open or short circuit in overheating sensor
F12 Heater unit lock-out
F13 Continuous heater unit lock-out
F14 Overheating sensor in incorrect position
F15 Open circuit in setpoint encoder