Fuses; Fuse 12 V; Fuse 240 V; Overheating Protection 240 V - Truma Combi 2 E Operating Instructions Manual

Fuses

Fuse 12 V

The fuse is in the electronics beneath the connection cover.
Replace the unit's fuse only with an identical fuse.
Device fuse: 10 A – slow – (T 10 A)
Fig. 5
Fuse 240 V
The fuse and the power supply lines must only be replaced by
an expert!
The unit must be disconnected from the mains (all
poles) before opening the electronic housing lid.
The fuse is in the power electronics (16) beneath the
electronic housing cover.
This fine fuse must always be replaced with a fuse of the
same type: 10 A, slow, interrupting capacity "H".
Fig. 6

Overheating protection 240 V

The 240 V heating facility has a mechanical overheating
switch. If the 12 V power supply is interrupted during opera-
tion or during the after-run period, for example, the tempera-
tures within the unit could activate the overheating protection.
Fig. 7
To reset the overheating protection, allow heater to cool,
remove connection cover and press red reset button.
T 10 A
14
T 10 A

Faults

Faults – Heater
Descriptions of possible fault causes and a troubleshoot-
ing guide can be found in the operating instructions for the
control panel that is installed.
Faults – Water supply
Possible fault causes and a troubleshooting guide – See

"Troubleshooting guide (water supply)".

Troubleshooting guide (water supply)
Fault
Water taking an extremely
long time to heat up.
Water running out, cannot fill
hot water system.
Cannot empty hot water
system, even though safety/
drain valve is open.
Water dripping/flowing from
draining socket of safety/
drain valve.
When opening the cold
water tap, hot water comes
out.
If these measures do not rectify the fault, please con-
tact the nearest Dometic Service.
Disposal
The device must be disposed of in line with the administrative
regulations of the respective country in which it is used. Na-
tional regulations and laws must be observed.
Cause / Remedy
Water container furred. /
Descale water system
(see "Maintenance").
Safety/drain valve open. /
Close safety/drain valve.
Safety/drain valve draining
connection blocked. / Inspect
opening for contamination
(slush, ice, leaves, etc.) and
remove contamination if
necessary.
Water pressure too high. /
Check pump pressure (max.
0.28 MPa). If connected to a
central water supply (rural or
urban connection), a pressure
reducer must be used, which
will prevent pressures higher
than 0.28 MPa entering the
hot water system.
Hot water flows back through
the cold water supply. / Fit a
non-return valve in the cold
water supply (refer to instal-
lation instructions "Water
connection").
7