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9 fault finding – Glow-worm Ultimate 80FF User Manual

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9 Fault Finding

Does pump continue to run after
SL is interrupted?

YES

Does pump stop after several
minutes?

System satisfactory.

Faulty PCB. Replace

NO

YES

YES

NO

NO

Does the pump run when SL is applied ?

Pump Overrun Operation For Fully Pumped System Only

The PCB has a timed pump overrun facility.

The pump should run for several minutes after remote controls have stopped calling for heat.

Before using the fault finding chart ensure all wiring is correct and in good condition, the pump is not faulty and check the PCB fuse F2

FOR FULLY PUMPED OPEN VENTED
OR SEALED WATER SYSTEMS ONLY

Diagram 9.3

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