Frymaster H55 Series - Page 23

High-Effi ciency Gas
2-18
A delayed ignition is most often described as popping. It is caused when the gas and air mixture
fail to ignite immediately.
Causes include:
 Cracked igniter or ignition wire.
 Cracked burner.
 Defective combustion fan assembly.
 Burned or pitted contacts in the heat relay.
 Dirty blower motor.
 Incorrect or fl uctuating gas pressure.
 Defective ignition module.
 Inadequate make-up air.
 Heat damage to controller or ignition modules.
 Incorrect blower adjustment.
 Air leaks in the combustion chamber or plenum gaskets.
Checking for Ignition Issues
Check ignition system using two microamp meters.
 Conduct closer inspection of ignitor alignment and positioning.
 Balance microamp readings with blower air intake.
 Inspect burner surfaces.
 Check fl ues for restriction.
 Check for air leaks at rails.
 Check for poor insulation.
 Ensure orifi ces are of the same size and clear of debris.
 Check modules for evidence of overheating.
Replace spade terminals on both ignitor sensors.
 Check fryer and its environment for:
Heat leaks or heat loss at front of pot.
Poor exhaust performance.
Heavy buildup of grease on fi lters.
Grease dripping down back of fryer wall.
• Solid-State Controller: Instant trouble light with no other lights on full vat. On split vats,
the trouble light will stay on with the controller turned off. If the probe is shorted, the fryer will
continue to heat.
• CM3.5: Prob
M2000 (McDonald’s controller): Probe Failure
M3000 (McDonald’s controller): Temp Probe Failure
3000/3010: Tempr Probe Failure