261I-Modell - 13/14 - Ausgabe 08/13 - 2354644 - BUE-0056-07EN
Troubleshooting
14
14.6.2 Alde heater/boiler
Yellow indicator lamp on
the energy selector
switch does not illumi-
nate
No supply voltage Check 230 V connection
and fuses
Overheating switch was
triggered
Press overheating switch
Boiler empties, safety/
drainage valve has
opened
Internal temperature be-
low 8 °C
Heat inside
Safety/drainage valve
cannot be closed
Temperature at safety/
drainage valve below
8°C
Heat inside
Red and green indicator
lamps are not lit
Fuse is defective Replace fuse on the
transformer/rectifier
Fan wheel runs noisily or
not steadily
Fan wheel is soiled Contact Truma service
department
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
battery voltage rises
above 11 V, the heater is
switched on automatical-
ly
Heater does not ignite at
230 V electrical operation
No 230 V power supply Switch on the 230 V au-
tomatic circuit breaker
Connect the 230 V power
supply
Heater switches off Overheating Allow the heater to cool.
To reset the display, in-
terrupt 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
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