Troubleshooting The 24 Vac Circuit In Units Configured For Electronic Ignition - Frymaster 47 SERIES Installation, Operation, Service, And Parts Manual

7.10.2 Troubleshooting the 24 VAC Circuit in Units Configured for Electronic
Ignition
Verify Drain Valve(s) is/are
fully closed.
Probable cause is failed Pilot
Relay.
No
Are 24
VAC present on J5 Pin
4 (and J1 Pin 4, if
Dual Vat)?
Yes
Probable cause is failed
Interface Board.
47 SERIES GAS FRYERS
CHAPTER 7: SERVICE PROCEDURES
Place ON/OFF switch in ON
position (Analog Controllers)
or press ON/OFF button to
activate computer.
Is spark
Yes
generated at the Pilot
Assembly?
No
Yes
Is/are MV LED(s) lit?
No
Yes
Is/are PV LED(s) lit?
No
Is/are PWR
Yes
LED(s) lit?
No
Yes
Is 24V LED lit?
No
Are 24 VAC
Yes
present on J4 Pin 4?
No
Probable cause is failed 24
Volt Transformer.
Probable cause is failed
No
Interface Board.
7-30
Problem may be with
Gas Valve. Refer to Gas
Valve Troubleshooting
Guides
Are 24
VAC present on J4 Pin
No
8 (and J2 Pin 8, if
Dual Vat)?
Yes
Problem is with
Gas Valve. Refer to Gas
Valve Troubleshooting
Guides
Probable cause is failed
Heat Relay.
Are 24
VAC present on J5 Pin failed Ignition Module. Check
No
2 (and J1 Pin 2, if
Dual Vat)?
Yes
Are 24
VAC present on J4 Pin
No
12 (and J2 Pin 3, if
Dual Vat)?
Yes
Is continuity on
Probable cause is failed High
No
High Limit Switch(es)
"0"?
Yes
Is
continuity on Drain
No
Safety Switch(es)
"0"?
Yes
Are 24 VAC
present on Pilot Valve
Yes
(PV) Terminal of Gas
Valve?
Probable cause is failed
Interface Board.
Probable cause is
module fuse before
replacing module.
Probable cause is failed
Interface Board.
Limit Switch.
Probable cause is failed
Drain Safety Switch.
Problem is with
Gas Valve. Refer to Gas
Valve Troubleshooting
Guides.