Moffat Blue Seal, Service Manual

Page: 13 / 40

Fault Finding 4
11
Fault Possible Causes Remedy
Pilot will not light. No gas supply.
Gas pressure too low.
Blocked Pilot Injector.
Knob on Gas Control Valve will not go fully
‘In’.
Ensure gas is connected and turned ‘On’ and
bottles not empty.
Check gas supply pressure.
(Refer Section 1 Specifications).
Clean or replace Pilot Injector.
(Refer Section 6.1.5).
Check for any obstruction and remove.
Replace Gas Control Valve.
(Refer Section 6.1.4).
Pilot goes out when Gas Control Knob
is released. Releasing Gas Control Knob before
thermocouple has heated.
Pilot Flame too small.
(Refer Fault Diagnosis Section 4.2.1).
Thermocouple faulty.
(Refer Fault Diagnosis Section 4.2.1).
Overtemp Thermostat faulty.
(Refer Fault Diagnosis Section 4.2.1).
Faulty Gas Control Valve.
(Refer Fault Diagnosis 4.2.2 Gas Control
Valve Faulty).
Thermopile faulty.
(Refer Fault Diagnosis 4.2.2 Thermopile
Faulty).
Hold Gas Control Knob in for longer (10 - 15
secs). Check that Pilot flame stays lit.
Correct fault.
Replace Thermocouple.
(Refer Section 6.1.7).
Replace Overtemp Thermostat.
(Refer Section 6.1.10).
Replace Gas Control Valve.
(Refer Section 6.1.4).
Replace Thermopile.
(Refer Section 6.1.8).
Pilot flame yellow / lazy. Gas pressure incorrect.
Restriction in Pilot Injector or aeration.
Check gas supply pressure.
(Refer Section 1 Specifications).
Clean or replace as required.
(Refer Service Section 6.1.5).
Pilot goes out when Main Burner
comes On. Incorrect gas pressure.
Faulty Gas Control Valve.
(Refer Fault Diagnosis 4.2.2 Gas Control
Valve Faulty).
Check supply / adjust pressure.
(Refer Section 1 Specifications).
Replace Gas Control Valve.
(Refer Section 6.1.4).
Pilot goes out while frying, will not
re-light. Overtemp Thermostat faulty (oil below 205ºC /
401ºF).
(Refer Fault Diagnosis Section 4.2.1).
Thermostat out of calibration (oil over 205ºC /
401ºF).
Replace Overtemp Thermostat.
(Refer Section 6.1.10).
Recalibrate Thermostat.
(Refer Section 6.2.4).
Pilot goes out while frying, can
re-light. Gas supply - incorrect or fluctuating gas pres-
sure.
Draught at installation (Pilot Burner blowing
out).
Loose Thermocouple connection.
Thermocouple faulty.
(Refer Fault Diagnosis Section 4.2.1).
Faulty Gas Control Valve.
(Refer Fault Diagnosis 4.2.2 Gas Control
Valve Faulty).
Check supply / adjust pressure.
Shield fryer from excessive draught.
Check Thermocouple connections are tight.
Replace Thermocouple.
(Refer Section 6.1.7).
Replace Gas Control Valve.
(Refer Section 6.1.4).
Fryer Faults