Truma CP plus Operating And Installation Instructions

13
Troubleshooting chart (Truma Combi furnace)
Error
code
Cause Remedy
# 17
Hot water mode with empty water
container.
Switch off furnace and allow to cool. Fill boiler
with water.
# 18
Warm-air outlet blocked. Check the individual outlet openings.
Circulated air intake blocked. Remove blockage from circulated air intake.
# 21
Room temperature sensor/cable
defective.
Contact Truma Service.
# 24 Imminent undervoltage, battery voltage
too low < 10.4 V.
Charge battery.
# 41 Electronics blocked. Contact Truma Service.
# 43
Excess voltage >16.4 V. Check battery voltage and power sources,
such as battery charger.
# 44
Undervoltage, battery voltage too low
<10.0 V.
Charge battery. If necessary, replace old
battery.
# 45 Only Truma Combi eco plus or Truma Combi comfort plus models.
No 120VAC supply voltage. Restore 120VAC supply voltage.
Overheating protection has responded. Contact Truma Service.
#112,
#202,
#121,
#211
Gas cylinder closed. Check gas supply.
Switch for gas shut-off valve open. Close switch for gas shut-off valve.
Overheating protection has responded. Switch off furnace and allow to cool; if neces-
sary, fill the water container with cold water.
Check warm air outlets and circulated air in-
take and remove blockages.
Switch furnace on again.
#122,
#212
Combustion air infeed or exhaust gas
outlet closed.
Check for obstructions such as slush, ice or
leaves and remove from the openings.
Switch for gas shut-off valve open. Close switch for gas shut-off valve.
Gas pressure regulation system
defective.
Contact Truma Service.
Overheating protection has responded. Switch off furnace and allow to cool; if neces-
sary, fill the water container with cold water.
Check warm air outlets and circulated air in-
take and remove blockages.
Switch furnace on again.
Electronics defective. Contact Truma Service.
#255 Furnace has no 12 VDC power supply. Ensure 12VDC power supply.
No connection between the furnace and
the control panel.
Ensure connection between furnace and con-
trol panel.
Control panel cable defective. Contact Truma Service.
If none of the measures in the troubleshooting chart proves successful or fault codes are displayed
that cannot be found in the troubleshooting chart, please contact the Truma Service Center at
1-855-558-7862 or one of our authorized service partners.

Truma CP plus Specifications

General

Display	LCD
Power supply	12 V DC
Quiescent current consumption (at 12 V)	Approx. 5 mA
Temperature range	-15 °C to +60 °C
Protection class	IP20
Compatibility	Truma Combi heaters