Frymaster FMCFE Service & Parts Manual page 26

MASTER JET CF SERIES ATMOSPHERIC GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1.9.1 Pilot/Ignition Failures (cont.)
Ignition failures occur when the 24VAC power supply to the gas valve is interrupted, when the gas
supply is interrupted, or when the pilot flame is extinguished.
There are three primary reasons for ignition failure, listed in order of probability:
1. Problems related to the gas and/or electrical power supplies.
2. Problems related to the electronic circuits.
3. Problems related to the gas valve.
PROBLEMS RELATED TO THE GAS AND/OR ELECTRICAL POWER SUPPLIES
The main indicators of this are that an entire battery of fryers fails to light and/or there are no
indicator lights illuminated on the fryer experiencing ignition failure. Verify that the quick
disconnect hose is properly connected, the fryer is plugged in, the main gas supply valve is open,
and the circuit breaker for the fryer electrical supply is not tripped.
PROBLEMS RELATED TO THE ELECTRONIC CIRCUITS
If gas and electrical power are being supplied to the fryer, the next most likely cause of ignition
failure is a problem in the 24 VAC circuit of the pilot system. If the fryer is equipped with a Filter
Magic II filtration system, first verify that the drain valve is fully closed. (The valve is attached to a
microswitch that must be closed for power to reach the gas valve. Often, although the valve handle
appears to be in the closed position, the microswitch is still open.) If the valve is fully closed, or the
fryer does not have a filtration system, refer to the troubleshooting tables in this chapter.
PROBLEMS RELATED TO THE GAS VALVE
If the problem is not in the 24 VAC circuit of the pilot system, it is most likely in the gas valve itself,
but before replacing the gas valve refer to the troubleshooting tables in this chapter.
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