Fault Codes
54
Designation Nº Fault Code
DHW sensor interrupted 01
Heating sensor interrupted 02
Lack of pressure in CH circuit 03
Faulty flame relay: stuck 04
Faulty safety circuit (*) 05
Overheat thermostat open during ignition 06
Flue spillage limit thermostat open before ignition 07
Faulty safety fuse open 08
Faulty safety relay (energized) 09
Faulty safety relay (will not close following demand) (*) 10
Burner off. Ignition time-delay too short 11
Burner off for lack of gas at lighting up (*) 12
Safety relay. Ignition time-delay too long 13
Overheat thermostat open during operation (*) 14
Flue gas spillage during operation (*) 15
Faulty safety relay. Lack of gas or electrical fault (*) 17
Pressure switch opening time-delay 19
Pressure switch close time-delay 20
Safety relay open during temperature control 21
Some hot water tap is dripping (*) 22
Faulty communication between micro-panels (electronic noise)(*) 23
Faulty internal wiring or bad contact of panel pins 24
(*) Whenever these fault codes appear, reset the waterheater by turning the selector knob to the
reset buttom. For the other codes, the waterheater will reset automayically once the fault is cleared.
Laura 20/20F wall-hung waterheaters
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