Truma Combi Service Handbook

Common Error Codes
#
Flashcode
Error
Error Info
Action
4 ssss, slss Current for combustion air motor too high Combustion air motor, cable
harness, or PCB fault
Go to Blue Pages:
Check Combustion Air
Motor, then PCB
5 ssss, slsl Current for combustion air motor too low Combustion air motor, cable
harness, or PCB fault
Go to Blue Pages:
Check Combustion Air
Motor, then PCB
6 ssss, slls Current for combustion air motor too high Combustion air motor, cable
harness, or PCB fault
Go to Blue Pages:
Check Combustion Air
Motor, then PCB
8 ssss, lsss Recheck flash code Electronic fault – Failure in PCB Restart heater, replace
electronics
10 ssss, lsls Plausibility of Combustion Air Sensor Combustion Air Sensor outside
of tolerance range – sensor or
harness
Go to Blue Pages:
Check Combustion Air
Sensor
18 Yellow indicator light flashes (9) times Warm air outlets blocked
circulated air intake blocked
Inspect individual outlet
apertures, remove air
intake blockage.
20 sssl, slss Plausibility of NTC Water Temperature Sensor Water Temperature Sensor
outside tolerance range –
sensor/harness, excessive temp
Allow system to cool
Go to Blue Pages:
Check WTS
21 sssl, slsl Plausibility of NTC Room Temperature Sensor Room Temperature Sensor
outside tolerance range –
sensor/harness, excessive temp
Allow system to cool
Go to Blue Pages:
Check RTS
22 sssl, slls Plausibility of NTC Air Temperature Sensor
Air Temperature Sensor outside
tolerance range –
sensor/harness, excessive temp
Allow system to cool
Go to Blue Pages:
Check ATS
24 sssl, lsss Current for air circulation motor too high Air circulation motor or PCB
fault
Go to Blue Pages:
Check Air Circulation
Motor, then PCB
25 sssl, lssl Current for air circulation motor too low Air circulation motor or PCB
fault
Go to Blue Pages:
Check Air Circulation
Motor, then PCB
26 sssl, lsls Current for air circulation motor too high Air circulation motor or PCB
fault
Go to Blue Pages:
Check Air Circulation
Motor, then PCB
45 ssls, llsl No 120VAC supply to Combi Fault in 120VAC power supply,
WECO manual reset switch
engaged
Verify 120VAC supply
voltage/engaged GFCI,
reset WECO manual
reset switch
69 slss, slsl Current monitoring for air circulation motor
with CP Plus – software error
Air circulation motor, CP Plus
(before C01.04.01), or PCB
fault
Go to Blue Pages:
Check Air Circulation
Motor, check CP Plus,
Check PCB
148 lssl, slss Overtemperature of the Combustion Air
Temperature Sensor
Combustion Air Sensor outside
tolerance range –
sensor/harness, excessive temp
Allow system to cool
Go to Blue Pages:
Check CATS

Truma Combi Specifications

General

Type	Combination heater
Fuel	LPG
Water capacity	10 liters
Control	Digital control panel
Safety Features	Overheat protection, flame monitoring
Efficiency	Up to 90%