Truma BM 10 Instructions De Montage page 16

Trouble-shooting list
Fault
No LED illuminates after
switching on.
Red LED illuminates
approx. 15 sec. after
switching boiler on.
After a long period of opera-
tion, boiler switches to fault
and red LED illuminates.
Green and red LEDs
illuminate as soon as boiler is
switched on.
Electric operation:
The water does not become
warm.
Water supply
Water taking an extremely
long time to heat up.
Water running out, cannot fill
boiler.
Cannot empty boiler, even
though safety/drain valve
is open.
Water dripping from draining
connection of safety/drain
valve.
If these measures do not remove the failure, please contact the Truma Service Centre.
16
Cause
– No operating voltage.
– Device fuse or vehicle fuse
defective.
– If window switch present –
window above cowl open.
– Gas cylinder empty.
– Gas cylinder or quick-clo-
sure valve in the gas line is
closed.
– Combustion air infeed or
exhaust gas outlet closed.
– Battery voltage is too low
< 10.5 V.
– Overtemperature monitor
has activated.
– Gas pressure regulator
iced up.
– Butane content in the gas
cylinder too high.
– Battery voltage is too low
< 10.5 V.
– Faulty electronic system.
– Operation without water;
over-temperature fuse cuts
off the heating element.
– Water container furred.
– Safety/drain valve open.
– Safety/drain valve draining
connection blocked.
– Venting hose is closed.
– The elbow connection on
the boiler is twisted.
– Water pressure too high.
Rectification
– Check 12 V battery voltage, charge battery if necessary.
– Check all electrical connections and lines.
– Check equipment 1.6 A fuse (see fuses) or vehicle fuse,
replace fuse if necessary.
– Close window.
– Replace gas cylinder.
– Open valves and check gas infeed.
– Remove the cap from the cowl or open the deck cowl.
– Check openings for soiling (slush, ice, leaves etc.) and
remove if necessary.
– Charge battery!
– To unlock, switch device off, allow to cool and then switch
on again.
– Use de-icing system controller (Eis-Ex).
– Use propane. (At temperatures below 10 °C in particular,
butane is unsuitable for heating purposes.)
– Charge battery!
– Please contact the Truma Service Centre.
– Switch off, wait 10 minutes, fill with water, switch on.
– Descale water system (see maintenance).
– Close safety/drain valve.
– Check opening for soiling and remove if necessary.
– Check opening (see above).
– Check hose for kinks and remedy.
– The venting hose on the elbow connection needs
to point upwards.
– Check pump pressure (max. 2.8 bar). If connected to a
central water supply (rural or urban connection), a pressure
reducer must be used, which will prevent pressures higher
than 2.8 bar entering the boiler.