Webasto Air Top 3500 ST Installation Instructions Manual - page 24
Initial Operation
After the heater has been installed, the fuel supply system
is to be bled thoroughly.
NOTE:
Owing to the low fuel consumption it is required that the
heater be turned on repeatedly to fill the fuel line leading to
the heater.
During a test run of the heater all connections are to be
checked for leakage and security. Should a malfunction of
the heater occur during operation, fault isolating measures
are to be performed.
Shut-Down on Faults
Faults related to individual heater components and mal-
functions during the start-up sequence are detected in the
control unit.
The heater is shut down (fault lock-out) in the following
cases:
- no or unsuccessful start-up
- temperature sensor defective
- temperature limiter (interruption or short-circuit)
- glow plug defective
- insufficient fan speed, short circuit or interruption
- fault in the metering pump circuit or overheat protection
circuit (during start-up phase only)
- undervoltage of less than 10 volts or overvoltage of
more than 15 volts and for longer than 20 seconds
(aplies to 12-volt heaters)
- undervoltage of less than 20 volts or overvoltage of
more than 32 volts and for longer than 20 seconds
(on 24-volt heaters)
- control unit defective
- overheating
Fuel supply will be interrupted in the event of overheating.
An after-run cycle is performed as is the case when the
heater is shut down manually.
After the after-run cycle has been terminated, the control
unit is in the fault lock-out state.
An overheating condition is indicated by 10 flashing light
signals of the operation indicator.
Eliminate cause of malfunction.
To deactivate the fault lock-out, the heater is to be briefly
(min. 2 seconds) turned off and then switched back on
again
one time
.
Fault Code Display
If the heater is equipped with a combination or standard
digital timer, a fault code is indicated on the display of the
digital timer whenever a malfunction has occurred:
F 00 Control unit failure / incorrect parameter set /
warm start detection
F 01 No
start-up
(after
2
start-up
attempts)
no
formation
of
flames
F 02 Flame
extinguished
(repeated
>5)
F 03 Undervoltage
or
overvoltage
F 04 Premature
flame
detection
F 06 Temperature
sensor
interruption
or
temperature sensor short-circuit
F 07 Metering
pump
interruption
or
metering pump short-circuit
F 08 Fan
motor
interruption
or
fan motor short-circuit or
fan motor incorrect speed
F 09 Pencil-type glow plug interruption or
pencil-type glow plug short-circuit
F 10 Overheating
F 11 Temperature
limiter
interruption
or
temperature
limiter
short-circuit
F 12 Setpoint
transmitter
(interruption
/
short-circuit)
Air Top 3500/5000
22
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