21
Fault Cause Remedy
(only on Combi D 6 E) – No 230 V operating voltage
– 230 V fuse defective
– Longer period of non-use, e.g.
over the winter months
– Restore 230 V operating voltage
– Replace 230 V fuse
– Operate the heater in diesel mode for approx. 30 minutes – then
switch over to electric mode
– Overheating protection has
been triggered
– Reset the overheating protection, allow the heater to cool, remove
the connection cover and press the reset button
Yellow LED flashes 3 x – Open window above cowl
(window switch)
– Close windows
Yellow LED flashes 4 x – Warm air temperature and / or
water temperature exceeded:
– Not all warm air ducts are
connected
– Warm air outlets blocked
– Circulated air intake blocked
– Check whether the 4 warm air ducts are connected
– Check the individual outlet openings
– Remove the circulated air intake blockage
– Summer mode with empty
water container
– Fill boiler with water
Yellow LED flashes 5 x – Room temperature sensor or
cable defective
– Contact Truma Service
Yellow LED flashes 6 x – Water temperature exceeded in
summer mode
– Fill boiler with water
Yellow LED flashes 7 x – Control panel or control panel
cable defective
– Contact Truma Service
Yellow LED flashes 8 x – FrostControl heating element
has a short circuit
– Disconnect heating element plug from electronic control unit,
replace heating element
If these actions do not remedy the problem, please contact Truma Service.
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