GILES GBF-35, Operation & Service Manual

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70
Troubleshooting
GBF − 50 Fryer
6.01 Temperature Control System − continued
Problem Probable Cause Repair Procedure
FRYER DOES NOT HEAT/BEGINS TO
COOL & STOPS COOKING:
POWER light ON.
HEAT switch in [HEAT] position.
HI ­ LIMIT light ON.
A. Power surge caused HI ­ LIMIT trip
B. Sticking contactor
C. Faulty Hi ­ Limit thermostat
D. Faulty Hi ­ Limit probe
E. Line spikes or noise
F. Hi
­ Limit probe mis ­ aligned
A. Turn power switch OFF for about
5 secs, then back ON
B. Replace contactor
C. Replace thermostat
D. Replace probe.
E. Install line filter/remove noise
source
F. Verify probe positioning
6.02 Oil Filtration System
Probable Cause Repair Procedure
OIL NOT PUMPING BACK TO FRY
VAT
A. PUMP switch not in [ PUMP]
position.
A. Properly set pump switch
B. Air leaking @ hoses, fittings, filter
pan, etc.
B. Inspect/repair source of air leak.
C. Faulty pump motor. C. Replace pump motor.
D. Oil pump clogged/jammed. D. Remve cover, clear obstruction.
E. Diverter valve not set to [OIL
RETURN] position
E. Place valve handle in proper
position
F. Oil Return valve set in [CLOSE ]
position
F. Place valve handle in proper
position to fill vat
G. Pump has 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 to pump.
I. Cold oil must be manually removed
from pan
J. Filter pan assembled incorrectly. J. Assemble filter pan correctly.
K. Dirty filter pan, too much residue K. Clean filter pan.
Problem