Frymaster MJCFEC, FMCFEC, J3F Initial Troubleshooting, 24VAC Frying Systems, Service Procedures

MASTER JET CF SERIES ATMOSPHERIC GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1.10.2 Initial Troubleshooting, 24VAC Frying Systems

PROBLEM		PROBABLE CAUSES		CORRECTIVE ACTION
Burner won’t ignite.	A.	ON/OFF switch is off.	A.	Turn ON/OFF switch on.
Light in ON/OFF switch
is not illuminated.
ON/OFF switch is on,	A.	No 24 VAC output from transformer.	A.	Check 24VAC circuit. Replace
but the switch light is				transformer if defective.
not illuminated.
	A.	Drain microswitch circuit (filter-	A.	Ensure drain valve is fully closed and
		equipped units) is open.		microswitch is functioning. Replace
				microswitch if defective.
	B.	24VAC is present at ON/OFF switch,	B.	On/Off switch is defective. Replace
ON/OFF switch is on		but continuity of the switch in ON		switch with a known working switch.
and the switch light is		position is not "0".
illuminated, but there is
	C.	Continuity of thermostat is not "0"	C.	Thermostat is defective. Replace with
no output to gas valve.
		(cooking oil/shortening temperature is		a known working thermostat.
		at least 15°F below thermostat
		setting).
	D.	Gas valve is suspect.	D.	Go to "No burner flame".
	A.	Pilot does not stay lit (fryer is on and	A.	Check high-limit switch. Switch
		thermopile output is approximately		continuity should be "0". If not, high-
		400 millivolts.		limit switch is defective. Replace high-
				limit switch.
	B.	Pilot does not stay lit (fryer is on and	B.	Inspect thermopile (units without
		thermopile output is not		interface board) and replace if
		approximately 400 millivolts.		defective.
	C.	Pilot stays lit, and the high-limit and	C.	Inspect gas valve and replace if
		thermopile are known working, but		defective.
		burners fail to light.
No burner flame.	D.	Gas valve is known to be good, but	D.	Inspect thermostat body (while still in
		there is not 24 VAC at the gas valve		frypot) for damage. Remove and
		terminals.		replace thermostat if bent, dented or
				cracked. Inspect leads for fraying,
				burning, breaks and/or kinks. If found,
				remove and replace thermostat.
				Remove leads from terminal block,
				allow oil to cool 15°F below thermostat
				setting and check continuity. If
				continuity is not "0", then thermostat
				has failed. Replace thermostat.
	E.	Continuity from terminal block to gas	E.	Inspect wiring for breaks or shorts and
		valve thermostat wire is not "0".		repair if necessary.

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