Truma BGF - Troubleshooting Guide

Fault Cause Remedy
Gas mode
Boiler does not operate after
switching on.
– No 12 V
power supply
– Window open
– Check battery voltage (min. operating voltage 10.5V).
– Check boiler fuse
(see Maintenance, “Fuses”).
– Close window above cowl.
After switching on, boiler does
not operate and red LED comes
on after about 30 sec.
After a long period of operation,
boiler switches to “Fault” and
red LED comes on.
– Cowl cover is fitted
– No gas supply
– Incorrect gas pressure
– Air in gas supply
– Overtemperature sensor
has activated
– Remove cowl cover and/or check for soiling and remove
if necessary.
– Check gas valves and cylinder.
– Check gas valves and cylinder.
– To clear the fault (and bleed off air), switch the appliance
off, wait for 5minutes and switch it on again.
– Check the water content, topping up if necessary (close
drain valve).
– To clear the fault, switch the appliance off, wait for 5 min-
utes and switch it on again.
Water supply
Water dripping from drain
valve.
Warm water coming out of cold
water tap.
– Water pressure too high
– Hot water flowing
back into cold water supply
– Check water pressure (max. 2.8bar). When connecting to
a central water supply a pressure reducer must be used.
– Fit a non-return valve to the cold water supply
(see installation instructions, “Water connection”).
If these actions do not remedy the problem, please contact Truma Service.
Troubleshooting guide
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