Programming instructions

DECATHLON SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-31
Problems Related to the Electronic Circuits
If gas and electrical power are supplied to the fryer, the next most likely cause of ignition failure is a
problem in the 24 VAC circuit of fryers equipped with electronic ignition systems, or in the pilot
system for those without electronic ignition. If the fryer is equipped with a SUFF/UFF filtration
system, first verify that the drain valve is fully closed. (The valve is equipped with 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 guides in this chapter.
Problems Related to the Gas Valve
If the problem is not in the 24 VAC circuit or pilot system, it is most likely in the gas valve itself, but
before replacing the gas valve refer to the troubleshooting guides in this chapter.
1.8.2 Improper Burner Functioning
With problems in this category, the burner ignites but exhibits abnormal characteristics such as
"popping", incomplete lighting of burner, fluctuating flame intensity, and flames "rolling" out of the
fryer.
"Popping" indicates delayed ignition. In this condition, the main gas valve is opening but the burner
is not immediately lighting. When ignition does take place, the excess gas "explodes" into flame,
rather than smoothly igniting.
The primary causes of popping are:
• Incorrect or fluctuating gas pressure
• Misdirected or weak pilot flame (main and/or trailing pilot)
• Clogged burner flame-transfer holes
• Clogged burner orifices
• Clogged burners
• Inadequate make-up air
• Heat damage to the controller or ignition module
• An out-of-adjustment ignitor or broken ignition wire
• A defective ignition module