elco R3400 Notice D'installation Et D'emploi page 37

Lockouts
No. Error type Explanation
20 Lockout Error gas valve V1, flame ionisation signal detec-
ted longer than 5 seconds after burner stop.
21 Lockout Error gas valve V2, flame ionisation signal detec-
ted longer than 5 seconds after burner stop.
22 Lockout APS contact does not close during prepurge.
23 Lockout APS contact remains closed when fan is off.
27 Lockout APS contact opens during operation.
30 Lockout CRC error in control system parameters (P11-
P40).
31 Lockout CRC error in boiler safety parameters (V1-V16).
32 Interlock Power supply voltage to boiler controller is too
low.
40 Lockout Water flow switch has been interrupted when
pump being enabled.
x.y. Lockout (all lockout codes which are not listed above)
Internal lockout of boiler controller.
Possible solution
Check closing position of valve V1 within gas combi
valve, replace gas valve.
Check closing position of valve V2 within gas combi
valve, replace gas valve.
Check setting APS, check if fan is running.
Check setting APS
Check setting APS
Check parameter settings of P11-P40, change value of
one parameter within P11-P40 (lockout disappears),
change all parameters back to original settings.
Check parameter settings of V1-V16, change value of
one parameter within V1-V16 (lockout disappears),
change all parameters back to original settings.
Check fuse of boiler controller, check power supply to
boiler controller.
Check pump operation, check water flow through the
boiler, check functionality of water flow switch.
Press reset. Change boiler controller when lockout can
not be reset or occurs more frequently.
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