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General Troubleshooting (KA7E & KA7EM)
SYMPTOM POSSIBLE CAUSES
No heat, but blowers, rotor and customer lamp do
operate when oven cavity is below set temperature.
1. High limit thermostat open.
2. K1 contactor malfunction.
3. K2 contactor malfunction.
4. Control board malfunction.
No display and/or keypad does not function.
1. Display cable connection loose.
2. Keypad connection at display circuit board loose.
3. Bad ribbon cable.
4. Keypad malfunction.
5. Display circuit board malfunction.
6. Control board malfunction.
Slow cooking.
1. Fan cover not installed correctly.
2. Clean oven fans.
3. Blower motor(s) malfunction. Test in P22.
Clean Cycle Troubleshooting (KA7E Only)
NOTE: Durning a cleaning cycle, pauses of several seconds may occur as the oven cycles from one mode of
cleaning to another mode. This is normal and should not be considered a problem.
SYMPTOM POSSIBLE CAUSES
Leaks into control area at drive arm.
TSB1400 KA7E - LEAKS AT DRIVE ARM GASKET
DURING WASH CYCLE.
Water is not spraying during wash cycle.
1. Wash cycle is in soak mode. Display shows
Soaking.
Wash arm is not turning.
1. Strainer pans are not installed correctly and are
interfering with wash arm motion.
Nothing seems to be happening after CLEAN is pressed.
1. Oven is cooling down or preheating to the optimum
temperature for cleaning.
Oven is not clean enough after clean cycle is complete.
1. Chemical bottle may be empty.
2. Ensure tubing is cut at an angle and that standpipe
is in place to prevent tube from curling inside
chemical bottle.
3. Water not hot enough.
4. May need additional pre-rinse programmed (P37).
Too much foam or white residue left after clean cycle.
1. Water not hot enough.
2. Add second pre-rinse to prime hot water line (P37).
3. Make sure washer arm is not plugged. Remove all
debris if necessary.
4. Increase wash pump duty cycle (P48).
5. Increase amount of chemical being used (P31).
KA SERIES ELECTRIC ROTARY OVENS - TROUBLESHOOTING
Page 65 of 72 F25294 Rev. A (0412)