FGP55 SERIES GAS RETHERMALIZERS
CHAPTER 1: SERVICE PROCEDURES
1-20
1.7 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.
Leakage
The probable causes of each category are discussed in the following sections. Troubleshooting
guides are included in
Section 1.8
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 60-second time
delay period and locks out. Turn the rethermalizer off, locate and fix the problem, then turn
rethermalizer back on to clear the module lock.
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 rethermalizers fails to light. Verify that the
quick disconnect hose is properly connected, the rethermalizer is connected to power, the main gas
supply valve is open, and the circuit breaker for the rethermalizer electrical supply is not tripped.
Some rethermalizers are equipped with a rethermalizer reset-switch that must be reset each time the
rethermalizer is turned off.
