Frymaster 8196606 - Manual (Page 18)

Cabinet Troubleshooting
3-2
Failure modes not accompanied by a master control display are shown below with possible causes
and tests.
Symptom Possible Causes Tests
Unit fails to power
up; fans don’t run.
•
No power to cord.
•
Blown 20 amp fuse.
•
Circuit breaker open.
•
Check for line voltage at the switch
and the transformer.
•
Reset circuit breaker.
Unit powers up and
fans run; a display
fails to light.
•
Broken or improperly
seated ribbon cable.
•
Defective display.
•
Switch ribbon cable from functioning
display to failed component to isolate
problem.
Unit powers up and
fans run; all
displays fail to light.
•
Failed power supply.
•
Check for 5VDC at communication
board and distribution boards.
Rows heat
improperly or not at
all.
•
Improper wiring on
distribution board.
•
Defective distribution
board.
•
Defective heater.
•
Defective sensor.
•
Ensure heater leads and power inputs
on the distribution boards are properly
seated.
•
Test for 208VAC input on distribution
board and 208VAC output from heater
leads to heater plate when the unit is
calling for heat.
•
Switch power leads from properly
operating row to faulty row to isolate
problem.
•
Check resistance of RTD lead against
temperature chart. See Page 2-4.
•
Switch RTD lead from properly
operating row to faulty row to isolate
problem.
•
Test continuity of heater plate.