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TROUBLESHOOTING
Troubleshooting
Before performing any of the troubleshooting checks
listed below, use the SERVICE MODE -
PROGRAMMING AND DIAGNOSTICS to assist in
diagnosing the problem. By utilizing the oven controls
diagnostic tests the service technician can quickly and
easily determine if a component is functioning
properly or in need of repair.
NOTE: Ensure wiring and board connections are tight
and secure; and board connectors are inserted
properly (not misaligned).
General Troubleshooting (KA7E & KA7EM)
SYMPTOM POSSIBLE CAUSES
Clogging at input and output of peristaltic pumps (KA7E
and KA7EM with grease assist only)
TSB 1417 KA7E - CLOGGING AT INPUT AND OUTPUT
OF PERISTALTIC PUMPS. See Multimedia section in
TIS.
Scrambled VFD display (KA7E only)
TSB 1381 KA7E ROTARY OVEN SCRAMBLED VFD
DISPLAY.
Power switch internal indicator light not on but oven
operates.
1. Wired incorrectly.
2. Power switch malfunction.
No power to oven controls.
1. Main breaker open.
2. Power switch malfunction.
3. Wired incorrectly.
Main breaker will trip.
1. Oven wired incorrectly.
2. Heat element shorted.
3. Wiring shorted.
Rotor does not turn.
TSI: HR7E AND KA7E ROTISSERIE OVEN ROTOR
CRANK ARM DISENGAGING FROM ROTOR. See
Multimedia section in TIS.
1. See TROUBLESHOOT ROTOR COMPONENTS.
2. Control board malfunction. Test in P22.
3. Crank arm pins sheared.
Blower motor does not run when cooking.
1. Blower motor malfunction. Test in P22.
2. Blower motor capacitor malfunction.
3. Control board malfunction.
Oven temperature does not reach desired temperature
or takes a longer time to heat-up and recover.
1. Incorrect line voltage.
2. Heat element malfunction.
3. High limit thermostat not set to maximum position.
4. Blower motors malfunction. Test in P22.
5. Blower motor capacitor malfunction.
6. Temperature sensor malfunction.
7. Oven out of calibration.
8. Control board malfunction.
KA SERIES ELECTRIC ROTARY OVENS - TROUBLESHOOTING
F25294 Rev. A (0412) Page 64 of 72