8 EN
Faults
Faults – Heater
Descriptions of possible fault causes and a troubleshooting
guide can be found in the operating instructions for the con‑
trol panel that is installed.
Faults – Water supply
Possible fault causes and a troubleshooting guide – See
“Troubleshooting guide (water supply)”.
Troubleshooting guide (water supply)
Fault Cause / Remedy
Water taking an extremely
long time to heat up.
Water container furred./
Descale water system (see
maintenance).
Water running away – boiler
cannot be filled.
Safety/drain valve open. /
Close safety/drain valve.
Boiler cannot be drained,
even though the safety/drain
valve is open.
Safety/drain valve drain‑
ing socket blocked. / Check
opening for soiling (slush,
ice, leaves etc.) and remove if
necessary.
Water dripping/flowing from
drainage socket of
safety/drain valve.
Water pressure too high. /
Check pump pressure (max.
2.8 bar). If the boiler is con‑
nected to a central water sup‑
ply (rural or urban connection),
a pressure reducer must be
used that will prevent pres‑
sures higher than 2.8 bar from
occurring.
After the heater has
been switched off, the
FrostControl opens.
At temperatures of less than
approx. 3 °C the FrostControl
opens automatically / Switch
heater on / Without heater op‑
eration the FrostControl can‑
not be closed again until the
temperature reaches approx.
7 °C / Use heating element for
FrostControl.
The FrostControl can no
longer be closed.
Temperature at FrostControl
less than approx. 7 °C /
Switch heater on / Without
heater operation the Frost‑
Control cannot be closed
again until the temperature
reaches approx. 7 °C.
Rotary switch is not
set to “Operation”. / Turn
the rotary switch of the
FrostControl to “Operation”,
then press the pushbutton un‑
til it engages.
Troubleshooting guide (fuel supply)
Error Cause / Remedy
Large amounts of smoke
on the cowl for more than 1
minute after the equipment
is started.
Fuel supply malfunction.
Improper installation.
Limited combustion air infeed
Fire hazard! Do not use the
equipment any longer. Contact
customer service.
If these actions do not remedy the problem, please
contact Truma Service.
Disposal
The appliance must be disposed of in accordance with the ad‑
ministrative regulations of the respective country in which it is
used. National regulations and laws (in Germany, for example,
the End‑of‑life Vehicle Regulation) must be observed.
In other countries, the relevant regulations must be observed.
Accessories
Truma CP plus
Digital control panel Truma CP plus with automatic air con‑
ditioning system for the iNet‑capable Truma heaters Combi and
Truma air conditioning systems Aventa eco, Aventa comfort
(from serial number 24084022 – 04/2013), Saphir comfort RC
and Saphir compact (from serial number 23091001 – 04/2012)
– The automatic air condition‑
ing system function auto‑
matically controls the heat‑
er and the air conditioning
system until the required
temperature is reached in
the vehicle.
– With the Truma iNet Box
extension, all TIN‑Bus‑
capable Truma appliances
can also be controlled via
the Truma App.
Figure 6
Truma iNet Box
The Truma iNet Box for simple networking and control of
Truma appliances with a smartphone or tablet computer using
the app.
– Simple installation and
start‑up via the Truma App
– Can be extended with the
update function, which
ensures that it is always up
to date
Figure 7
Truma CP classic
Analogue control panel for Combi D 4
1
3
5
7
9
40
°
60
°
60
°
Combi
1
2
3
4
5
Figure 8
Heating element for FrostControl
Heating element with 1.5 m connector cable and retaining
bracket.
Figure 9
Other accessories (not illustrated) for control panels
– The cable is available in different lengths.
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