SERVICE MODE SWITCH IN MAX POSITION

Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4

Observation:

RETURN TO FAULT CODE PAGE
Five pulses signify service mode switch is set in maximum position reset as necessary.

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Minimum Service Mode

Maximum Service Mode

Normal Mode

The positions may differ slightly depending on which PCB is fitted, check for the indicators on the PCB and if that's not visible refer to manufacturer's instructions, on MIN the blue light flashes twice. On MAX the blue light flashes 5 times and on normal the blue light is on.

Note:
In the unlikely event that the potentiometer is in the "normal" position and the light on the boiler is still flashing then the PCB will need to be replaced CLICK HERE