Glow-worm Ultimate 80FF - Manual (Page 27)

27 2000225233B
Diagram 9.2
9 Fault Finding
Is neon 1 lit?
YES
YES
Is neon 2 lit?
YES
NO
Correct power supply problem.
NO YES
Is there 230V~
between 3 on thermostat and N ?
Replace thermostat.
NO
YES
NO
Is neon 3 lit?
Is there 230V~ between
"N/C" on air pressure switch and N ?
YES
Check yellow cable between printed circuit
board and air pressure switch.
If satisfactory replace printed circuit board.
YES
NO Is there 230V~ between "C" on air
pressure switch and N ?
Replace air pressure switch.
Does fan run?
YES
NO
NO YES
Replace fan.
YES
Replace printed circuit board. Does fan Hunt?
NO
Inspect air tubes for leaks, kinks and correct
fitting. If satisfactory replace faulty air pressure
switch.
NO
Is there 230V~between "N/O" on air
pressure switch and N ?
NO
NO
Inspect electrode lead /connection
for poor contact. Check electrical supply
polarity and correct if necessary.
If satisfactory replace printed circuit board.
YES
With pilot lit does spark stop?
NO
Replace main solenoid
YES
Replace multi-functional control.
YES
Is Neon 4 lit?
NO
Does main burner light?
System satisfactory
NO
YES
NO
YES
YES
NO
NO Is there 230V~ between SL and
N and between L and N ?
Is there 230V~ between yellow connection
on overheat device and N ?
YES
Is there 230V~ between motor connections on fan?
YES
Isolate electrical supply test fan
harness continuity.
If satisfactory replace printed circuit board.
Before detailed checking of electrical components ensure that remote controls are calling for heat. Check the gas supply is free of obstructions and purged of
air. Check the overheat cutoff has not operated. For fully pumped systems only. Isolate the electrical supply and physically check ALL cables, connections
and the printed circuit board fuse. Check the air tubes to the air pressure switch. Switch on the electrical supply and check for correct polarity. Turn the
boiler thermostat to its maximum setting. Also check fuses.
Check overheat reset.
If satisfactory replace overheat device.
Is there a spark at pilot burner?
Check lead continuity and inspect electrode and
lead for damage.
Check for pilot jet blockage, incorrect electrode
adjustment isolate supply. Remove plug from
multifunctional control. Check continuity of pilot
solenoid between EV1 and COM, continuity OK?
Does pilot light?
NO
Replace
multifunctional
control Replace pilot
solenoid.
NO YES
Isolate supply. Remove plug from the
multifunctional control. Check continuity
of main solenoid between EV2 and COM.
Continuity OK?
M A I N T E R M I N A L S T R I P
C O N T R O L T H E R M O S T A T