Rational iCombi Pro Troubleshooting Manual page 20

Error tree: Automatic ignition controller
Service error: 33.4
Unit type: iCombi
Service error: 33.4
Service error 33.4
Does the connected gas type match what is indicated
on the nameplate?
Yes
Error in the gas combustion system
"Blocking error" → after the error has been resolved, automatic reset
Service 33.4
Polarity errorGas error 44
Phase (L) and neutral conductor (N)
interchanged?
Yes
Switch the phase (L) and neutral conductor (N)
(reverse the safety plug connection).
1
Switch the unit to the gas type declared on the
No nameplate.
Note: Repeat flue gas check required!
V01 · 05/2021 · RTS/Shof · en-GB