Frymaster D - Manual (Page 36)

DECATHLON SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-31
1.8 Troubleshooting and Problem Isolation
Because it is not feasible to include every issue that might occur, this section is intended to provide
technicians with a general knowledge of the broad problem categories associated with this
equipment and the probable causes of each. With this knowledge, the technician should be able to
isolate and correct any problem encountered.
You are likely to encounter problems in these broad categories:
1. ignition failure, 5. improper burner function,
2. improper temperature control, 6. improper computer function,
3. improper filtration function, 7. frypot leakage, and
4. basket lift malfunction.
The probable causes of each category are discussed in the following sections. Troubleshooting
guides are included in Section 1.9 to assist in identifying some of the more common problems.
1.8.1 Ignition Failure
Ignition failure occurs when the ignition module fails to sense a flame within the 60-second time
delay period and locks out. Turn the fryer off, locate and fix the problem, then turn fryer back on to
clear the module lock.
There are three primary reasons for ignition failure, listed in order of probability:
1. The gas and electrical power supplies,
2. The electronic circuits, or
3. The gas valve.
The Gas and Electrical Power Supplies
The main indicators that the gas or electrical power supply is the cause of ignition failure are as
follows: 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.
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, 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. The valve handle can appear to be closed when the
microswitch is open.) If the valve is fully closed, or the fryer does not have a filtration system, refer
to the troubleshooting guides in this chapter.