Webasto Dual Top ST 6 Installation Instructions Manual page 27

Message 06 - Fuel pump disconnected or
system overheated
Message 07 - Fuel pump short circuit
Message 08 - Failure hot air fan
Message 09 - Failure fan amplifier
Message 10 - High temperature sanitary
water
Message 11 - High temperature sanitary
water
Message 12 - High temperature heating
air
Table 5: Table 2: Fault messages of programmable control panel
Message 13 - High temperature heating
air
Message 14 - Failure cooling air ventila-
tion
Message 15 - Failure combustion air mo-
tor
Message 16 - Failure combustion air mo-
tor
Message 17 - Failure control unit
Message 18 - Failure cabin temperature
sensor
Message 19
9026389C II Dual Top ST 6
Fuel pump disconnection / one
of the three overheating
switches detects too high a
temperature or relay box,
cable or connection relay box
is defective.
Fuel pump short circuit to
ground OR relay box, cable or
connection relay box is defect-
ive.
Hot air motor fault:
disconnection / short circuit /
fan speed out of range / fan
blocked.
No communication between
amplifier of hot air fan and
heater control unit.
Overheating water temperat-
ure sensor.
Exceeding gradient water tem-
perature sensor.
Overheating hot air temperat-
ure sensor.
Exceeding gradient hot air
temperature sensor.
Overheating of heaters' con-
trol unit.
Combustion air motor inter-
rupted.
Combustion air motor fault:
disconnection / short circuit /
overload / blocked.
Control unit (heater) fault /
heater locked.
Interior temperature sensor
disconnection / short circuit.
n/a
2. Reset heater by pressing OK or switching off for
at least 5 sec.
1. Check fuel pump cable and connectors, check for
overheating (see messages 10, 11, 12, 13 and 14),
2. Reset heater by pressing OK or switching off for at
least 5 sec.
3. Check wiring harness relay box to heater.
4. Check relay box and connections relay box.
1. Check fuel pump cable and connectors.
2. Check wiring harness relay box to heater.
3. Check relay box and connections relay box.
1. Make sure that hot air fan can rotate freely,
2. Remove possible blocking objects,
3. Reset heater by pressing OK or switching off for at
least 5 sec.
1. Check internal cable routing (4-pins) from control
unit to PWM module.
2. Contact a Webasto Service Centre.
1. Check water level,
2. Reset heater by pressing OK or switching off for
at least 5 sec. or select winter mode without hot
water production.
3. Check fuel pump cable and connectors.
1. See message 10.
2. Check if hot and cold water pipes have been con-
nected correctly.
1. Make sure that hot air can flow freely, air intake
and outlets are not blocked.
2. Reset heater by pressing OK or switching off for
at least 5 sec.
3. Check fuel pump cable and connectors.
See message 12.
1. Make sure that cooling air can flow freely,
2. Reset heater by pressing OK or switching off for
at least 5 sec.
1. Make sure that cooling fan can rotate freely,
2. Remove possible blocking objects.
3. Check fuse 15 A (red cable).
See message 15.
1. Put heater back into service (see above this table)
and restart heater.
2. Contact a Webasto Service Centre.
1. Check routing of cable, avoid that it is pinched or
crushed,
2. Check the connector behind the control panel.
3. Reset heater by pressing OK or switching off for
at least 5 sec.
4. Replace the interior temperature sensor.
n/a
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