13 fault finding – Glow-worm Betacom C User Manual

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13 Fault finding

13.2 Fault finding chart 2.

Check domestic hot water operation.

13.3 Fault finding chart 3.

Check central heating operation.

14497

14498

Diagram 13.5

Diagram 13.6

4

Ensure DHW taps

are closed

Put CH temperature

Is overheat

thermostat LED flashing?

Check and if

necessary replace

Check and if

necessary reset or

replace

Ensure external controls

are calling for heat

Does pump run ?

No

Yes

Yes

Yes

No

Yes

Check and if

necessary replace

Check and if

necessary replace

No

No

Is 230 V AC

present on terminals of

Is CH sensor LED

flashing ?

Go to chart

5