Supplied By www.heating spares.co Tel. 0161 620 6677
45
220692C
45
SECTION
11
Fault Finding
Fault Finding
Turn boiler Control Thermostat to maximum, with the remote controls calling for heat,
does the pump continue to run after the appliance has shut down on boiler control thermostat?
Pump overrun Operation
The Control Thermostat has a pump overrun facility built into it, when the Control Thermostat is set at maximum only,
the pump overrun will keep the pump running to allow the boiler to cool down after which it will stop, providing the remote controls are NOT
calling for heat.
Turn off remote controls, does
the pump stop after a short
period of time
Faulty Pump overrun.
Replace Control
Thermostat
Pump overrun in order.
Is there 240V~ on 11 ?
Is there 240V~ on 9 for
pump?
Is there 240V~ on 9
connection on thermostat?
Faulty permanent live feed.
Replace.
Faulty connections between
thermostat and terminal strip.
Repair.
Faulty internal wiring between
terminal block and thermostat.
Repair.
Faulty pump / wiring ? Replace
or repair as necessary.
NO
NO NO
NO
NO
YES
YES
YES
YES
YES
4756
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