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Chapter 3: TROUBLESHOOTING GUIDE
Fryers:
It is assumed that, before starting any troubleshooting, the power is turned on and the gas lines are con-
nected correctly.
PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
Computer does not come on A. Main circuit breaker is turned off A. Locate the correct circuit breaker and
nothing shows in either display B. Fryer fuse is blown turn OFF and back ON again.
C. Transformer B. Check and Replace as needed
C. Check Transformer
Computer heat light comes on A If the oil is hot the Hi Limit may be A. Allow the oil to cool, the Hi Limit will
but burners do not tripped reset itself. Turn the computer OFF and
back ON again to reset the computer.
Computer display shows "OFF" A. Computer A. Switch circuit breaker OFF and ON
and cannot be turned "ON" again to try to reset computer, if this
does not remedy the problem, replace
computer.
Heat Light ON, Computer shows A. Heat Demand Relay A. Check Heat Demand Relay.
"IGNITION" "FAILURE" B. F2 Fuse may be blown B. Check and replace as needed.
C. Blower C. Check and replace as needed.
D. Pressure Switch D. Check and replace as needed.
E. Gas Valve E. Check and replace as needed.
F. Ignition Module (One or both) F. Check and replace as needed.
G. Gas Valve Relay (Full Vat Only) G. Check and replace as needed.
H. Tripped or defective Hi Limit H. Allow the oil to cool, the Hi Limit will
reset itself. Turn the computer OFF and
back ON again to reset the computer.
Check and replace is needed.
No Spark heard, blower IS A. Heat Demand Relay A. Check and replace where needed.
running B. Ignition Control Module B. Check and replace where needed.
C. Spark Ignitor C. Check and replace where needed.
Spark sound can be heard, A. F2 fuse blown A. Check and replace where needed.
Blower NOT running B. Blower B. Check and replace where needed.
C. Heat Demand Relay C. Check and replace where needed.
Spark sound can be heard, A. Ignition Control Module A. Check and replace where needed.
Blower IS running but main B. Gas Valve Relay (Full Vat Only) B. Check and replace where needed.
burners do not run C. Bad Pressure Switch C. Check and replace where needed.
D. Tripped or defective Hi limit D. Check and replace where needed.
E. Gas Valve E. Check and replace where needed.
Burner comes ON for short A. Flame Sensor A. Check and replace where needed.
time, does not come back on B. Ignition Control Module B. Check and replace where needed.
C. Gas Valve C. Check and replace where needed.
Computer controls left side of A. Wiring harnesses attached in wrong A. Remove power to machine, power up
split vat only order again.
Unplug both sides of computer, plug in
right side first then the left side.
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