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33. Install the upper oil-zone insulation (21) by pressing it under the upper combustion chamber
metalwork. Secure the insulation with the bracket (22) and ¼” self-tapping screws.
34. Install the upper burner rail blanket insulation (23). Position any excess insulation toward the
top of the frypot. Avoid overhang past the bottom of the upper burner rail. Overhang in this
area will make future burner replacement more difficult.
35. Cover the insulation with the insulation retainer (24), and secure with ¼” self-tapping screws.
36. Reinstall probes, drain valves, high-limit thermostats and other pipefittings using Loctite
®
PST56765 sealant or equivalent on their threads.
1.7 Troubleshooting and Problem Isolation
Because it is not feasible to attempt to include in this manual every conceivable problem or trouble
condition that might be encountered, 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
7. Basket lift malfunctions.
The probable causes of each category are discussed in the following sections. A series of Trouble-
shooting Guides is also included at the end of the chapter to assist in identifying some of the more
common problems.
1.7.1 Ignition Failures
Ignition failure occurs when the ignition module fails to sense a flame within the 4-second time de-
lay period and locks out. When this happens, the module sends 24 VAC through the interface board
alarm circuit to the controller/computer.
Analog controllers indicate ignition failure by illuminating the heat light and trouble light
simultaneously. Digital, Computer Magic III, and Basket Lift Timer controls display “
H E L p.”
The three primary reasons for ignition failure, listed in order of probability, are:
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.