15.6.2 Alde heater/boiler
15.6.3 Truma boiler
Z If a fault occurs in the system, the cause is shown on the display.
Fault Cause Remedy
Heater does not ignite with
gas operation
Lack of gas Open regulator tap and
gas isolator tap
Connect a full gas bottle
Heater does not ignite Battery voltage too low Charge battery. If the bat-
tery voltage rises above
11 V, the heater is switched
on automatically
Heater does not ignite at
230 V electrical operation
No 230 V power supply Switch on 230 V automatic
circuit breaker
Connect 230 V power sup-
ply
Heater switches off Overheating Allow the heater to cool.
To reset the display, inter-
rupt the 12 V power supply
to the heater and switch it
back on again
Heater running, but no
heat at the convectors
Circulating pump does not
work
Switch on room thermo-
stat
Contact customer service
Heater and circulating
pump running, but no heat
at the convectors
Air in the heating system Bleed hot-water heater
Fault Cause Remedy
Gas operation
Red indicator lamp "Fault"
illuminates
Air in the gas pipe system Switch off and on again.
After two futile ignition at-
tempts, wait for
10 minutes before trying
again
Lack of gas Open regulator tap and
gas isolator tap
Connect a full gas bottle
Defect of a safety element Contact customer service
Green indicator lamp be-
hind knob is not lit
Fuse of the boiler is defec-
tive
Replace fuse
Fuse in the electronic con-
trol unit has been trig-
gered
Contact customer service
Red and green indicator
lamps are not lit
No power supply Connect the power supply
Fuse of the boiler is defec-
tive
Replace fuse