Doc No. 700015 Page 33 of 36
6. Fault
Finding Guide.
Check:
1. Integrity of spark leads
2. Integrity of electrode
assembly & spark gap
3. Burner controller
Ensure gas & electricity
supplies are enabled.
Does the RED
neon
illuminate?
Check:
1. Operation of any thermostat
2. Any external fuses
3. Correct voltage is selected
YES
Does the
combustion fan
run?
Does the
amber light
illuminate after
10s purge?
If the heater still fails to
operate normally,
please contact
the Nortek Global HVAC
(UK) Limited service
department
NO
NO
Does the
vacuum switch
`pull in`?
Check:
1. Wiring harness & plugs
2. Vacuum switch operation
3. Replace fan
Is the burner
sparking?
Does the gas
valve open?
Check:
1. Burner controller
2. Replace gas valve
Check:
1. Vacuum switch tubes
2. Emitter tubes, air inlet & flue
for obstructions
3. Operation of vacuum switch
4. Replace combustion fan
NO
YES
Check:
1. Burner controller
2. Wiring harness
3. Amber neon faulty
Check:
1. Burner inlet pressure
2. Burner nozzle pressure
3. Check live & neutral polarity
4. Check presence of good earth
YES
YES
NO
NO
YES
NO
YES
Does the
amber light
illuminate for 10s
then go out?
NO
YES
YES
Is there power
on the burner?
Check:
1. Burner controller
2. Red neon faulty
YES
NO
