Troubleshooting Guides; Troubleshooting The 24 Vac Circuit: Analog Controller; Troubleshooting The 24 Vac Circuit: Electronic Ignition (Computer Controller) - Frymaster GASFRYERSMODELS 35 User Manual

1.7 Troubleshooting Guides

The following are only guides. They are provided to assist the technician or service professional in the
isolation of failures in components and wiring on the fryer.
1.7.1 Troubleshooting the 24 VAC Circuit

Troubleshooting the 24 VAC Circuit: Analog Controller

Before troubleshooting, verify that the drain valve(s) is fully closed and move the power switch into the
ON position.
24 VAC not present at gas valve or the power switch.
Continuity across the power switch not equal to 0.
Continuity across the thermostat not equal to 0.
• If 24 VAC is present at the gas valve, go to Troubleshooting the Gas Valve, Section 1.7.2.

Troubleshooting the 24 VAC Circuit: Electronic Ignition (Computer Controller)

Before troubleshooting, verify that the drain valve is fully closed, then turn on the controller.
No LEDs on the interface board are lit.
24 volt LED on the interface board is lit, no others.
GV LED on the interface board is lit (with or without other LEDs).
LED 3 is continually lit, but LED 2 and LED 4 are not lit.
LEDs 2, 3, and 4 are lit, but 24 VAC is not present at V1S (V1D and
V2D on dual-vat units).
LEDs 2, 3, and 4 are lit, and 24 VAC is present at V1S (V1D and
V2D on dual-vat units).
• If a failed ignition module is suspected, replace the questionable module with one known to be good to isolate the problem.
• If 24 VAC is present on pin 6 on J1, but the pilot will not light, go to Troubleshooting the Gas Valve, Section 1.7.2.
• If 24 VAC is present on pin 20 of the 20-pin terminal block, but not at the gas valve, go to Troubleshooting the Gas Valve,
Section 1.7.2.
PROBLEM
PROBLEM
• Failed 24 volt transformer
• Failed power switch
• Failed thermostat
• Failed 24 volt transformer
• Failed interface board
• Failed or open drain safety switch
• Failed wiring between components
• Failed interface board
• Failed or open drain safety switch
• Failed wiring between components
• Failed interface board
• Open high-limit thermostat
• Failed or open drain safety switch
• Failed wiring between interface board
and gas valve
• Failed gas valve
• Failed heat relay
• Failed interface board
• Failed igition module
• Failed interface board
• Failed interface board
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PROBABLE CAUSES
PROBABLE CAUSES