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.

 

 

 

 

 

 

 

 

 

 

1-33

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Frymaster MJCFEC, FMCFEC, KJ3FC, J65X, JCFX manual Initial Troubleshooting, 24VAC Frying Systems, But the switch light is

JCFX, J65X, J3F, KJ3FC, MJCF specifications

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