Troubleshooting And Problem Isolation; Ignition Failures - Frymaster 47 Series Service & Parts Manual

47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
CAUTION
Before installing thermostat/temperature probe, high-limit thermostat, and drain
valve on replacement frypot, clean their threads and apply Loctite™ PST567 thread
sealant or equivalent to the threads.

1.9 Troubleshooting and Problem Isolation

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.
Problems you are likely to encounter can be grouped into seven broad categories:

1. Ignition failures

2. Improper burner functioning
3. Improper temperature control
4. Computer-related problems
5. Filtration problems
6. Leakage problems
7. Modular basket lift malfunctions.
The probable causes of each category are discussed in the following sections. Troubleshooting
guides are included in Section 1.10 to assist in identifying some of the more common problems.
1.9.1 Ignition Failures
Ignition failure occurs when the ignition module fails to sense a flame within the 4-second time
delay period and locks out. When this happens, the module sends 24 VAC through the interface
board alarm circuit to the controller/computer.
Solid-state controllers indicate ignition failure by illuminating the heat light and trouble light
simultaneously. Computer Magic III controls display " ".
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.
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