9 fault finding – Glow-worm Ultimate 80FF User Manual
Page 28
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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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