Giles & Posner GBF-35 Banked, Operation & Service Manual, Page: 84 / 110

72
Troubleshooting
GBF-Series Fryers
7.01 Temperature Control System (continued)
Problem Probable Cause Repair Procedure
FRYER WILL NOT HEAT:
Power light ON .
Heat Switch in HEAT position.
High Limit light ON .
A. Power surge.
B. Sticking contactor.
C. Faulty High-Limit board.
D. Faulty High-Limit probe.
E. Line spikes or noise.
A. Turn Power Switch OFF for
approx. 5 seconds.
B. Replace contactor.
C. Replace High-Limit board.
D. Replace High-Limit probe.
E. Install Line Filter or remove
noise source.
7.02 Oil Filtration System
Probable Cause
Repair Procedure
OIL NOT RETURNING TO FRY
VAT A. Pump Switch not in PUMP
position.
A. Set Pump Switch to PUMP
position.
B. Air leaks (hoses, fittings, filter
media).
B. Repair source of air leak.
C. Faulty pump motor. C. Replace pump motor.
D. Oil pump clogged or jammed. D. Free pump, clear obstruction.
E. Pump Diverter Valve not set to
OIL RETURN position
E. Place Pump Diverter Valve in
OIL RETURN position
F. Oil Return Valve set in CLOSE
position
F. Place Oil Return Valve in FILL
VAT position
G. Pump had been used to pump
boil-out solution.
G. Disassemble, clean & re-oil
pump.
H. Old oil allowed to sit in pump
too long.
H. Run clean warm oil through
pump.
I. Oil too cool in Filter Pan.
I. Remove Filter Pan & manually
remove cool or cold oil.
J. Filter Pan assembled incorrectly. J. Assemble Filter Pan correctly.
K. Dirty Filter Pan. K. Clean Filter Pan.
Problem