Troubleshooting Guides; Initial Troubleshooting - Frymaster 47 Series Service & Parts Manual

1.9.8 Interpretation of Digital Controller Lights (cont.)
Power light on, heat light off, trouble light on, and melt light off:
●
If the fryer oil temperature is below 410°F (210°C), the lights indicate one of the following:
a. The probe circuit is defective, or
b. There is a connection problem on pins 2 or 10 on the 15-pin wiring harness.
●
If the fryer oil temperature is above 410°F (210°C), the lights indicate a run-away heating circuit.

1.10 Troubleshooting Guides

The following troubleshooting guides are intended to assist service technicians in quickly isolating
the probable causes of equipment malfunctions by following a logical, step-by-step process.

1.10.1 Initial Troubleshooting

PROBLEM
Burner won't ignite.
Light in ON/OFF switch
is not illuminated.
ON/OFF switch is on,
but the switch light is not
illuminated.
ON/OFF switch is on and
the switch light is
illuminated, but there is
no output to gas valve.
47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
PROBABLE CAUSES
A. ON/OFF switch is off.
A. No 24 VAC output from transformer. A. Check 24VAC circuit. Replace
A. Drain microswitch circuit (filter-
equipped units) is open.
B. 24VAC is present at ON/OFF switch,
but continuity of the switch in ON
position is not "0".
C. Continuity of thermostat is not "0"
(cooking oil/shortening temperature is
at least 15°F below thermostat
setting).
D. Gas valve is suspect.
CORRECTIVE ACTION
A. Turn ON/OFF switch on.
transformer if defective.
A. Ensure drain valve is fully closed and
microswitch is functioning. Replace
microswitch if defective.
B. ON/OFF switch is defective. Replace
switch with a known working switch.
C. Thermostat is defective. Replace with
a known working thermostat.
D. Go to burner troubleshooting.
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