Trouble-Shooting List - Truma Combi D 6 Mode D'emploi

Trouble-shooting list

Flash code on the control panel
Flash sequence LED:
– On:
– Off:
Pause between the flashing sequence:
Fault
After switching on
(winter and summer opera-
tion) none of the LEDs are lit.
The green LED comes on
when the unit is switched
on, but the heater does not
operate.
Green LED flashes after
heater is switched off.
Red LED flashes 6 x.
Red LED flashes (except
6 times) or red LED shines.
Yellow LED flashes 1 x.
Yellow LED flashes 2 x.
Yellow LED flashes 3 x.
Yellow LED flashes 4 x.
Yellow LED flashes 5 x.
Yellow LED flashes 6 x.
Yellow LED flashes 7 x.
Yellow LED flashes 8 x.
0.5 seconds
0.5 seconds
3.0 seconds
Cause
– No operating voltage.
– Device fuse or vehicle fuse
defective.
– The temperature setting
on the control panel is
lower than the room
temperature.
– After-running is active in
order to reduce the unit's
temperature.
– Insufficient fuel due to
insufficient fuelling, empty
tank, and / or inclined
vehicle orientation.
– Malfunction of the heating
device.
– Possible under-voltage
< 11.5 V.
– Under-voltage < 10.2 V.
– Over-voltage > 16.4 V.
– Open window above cowl
(window switch).
– Warm air temperature
and / or water temperature
exceeded:
– Not all warm air ducts
are connected.
– Hot-air outlets blocked.
– Recirculated air intake
blocked.
– Summer operation with
empty water tank.
– Room temperature sensor
or cable defective.
– Water temperature exceed-
ed in summer mode.
– Control panel or control
panel cable defective.
– Heating element
for FrostControl has
short-circuited.
Rectification
– Check 12 V battery voltage, charge if necessary.
– Check all electrical plug connections.
– Check the unit or vehicle fuse and replace if necessary
(see fuses).
– Select higher room temperature at the control panel.
– No error. Coasting operation switches off after
max. 5 minutes.
– Fill tank with fuel. Then fill the fuel line as described under
"Initial start-up".
– Please contact the Truma Service Centre.
– Use the electrical power from the battery carefully,
e.g. restrict lighting.
– Charge battery.
– Check battery voltage, charge if necessary.
– Short-term immediate measure: switch off heavy load or
start up vehicle engine until the heater starts running
(approx. 4 minutes).
– Battery capacity inadequate, if necessary exchange old
battery.
– Check the battery voltage and power supply such as e.g.
the charging device.
– Close window.
– Check whether the 4 warm air ducts are connected.
– Check individual outlet apertures.
– Remove blockage from recirculated air intake.
– Fill boiler with water.
– Please contact the Truma Service Centre.
– Fill boiler with water.
– Please contact the Truma Service Centre.
– Disconnect the heating element plug on the electronic
control unit. Exchange the heating element.
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