ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
CODE | RELAY | COMPONENT | TEST |
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| Door magnetic reed switch. Result will be displayed | 0 | = open; | |
01 | K1 | door motor | automatically. Rotate the door handle to change the | |||
condition. Press and hold the TEMP key to close the | 1 | = closed | ||||
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| door; release to open. |
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| Cavity vent micro switch. Result will be displayed | 0 | = open; | |
02 | K2 | cavity vent motor | automatically. Press and hold the TEMP key to | |||
1 | = closed | |||||
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| Convection fan motor value - press and hold the | 0 | = incorrect; | |
03 | K3, K6 | contactor KM1 (half power, full speed) | TEMP key for 30 sec. to test the fan motor | |||
configuration settings. The test result will be | 1 | = correct. | ||||
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04 | K3 | cooling fan(s) and door light only | Cavity Hi Limits and steam generator thermal | 0 | = open; | |
fuse(s). Press and hold the TEMP key for result. | 1 | = closed | ||||
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05 | K3, K4 | water injection solenoid (humidifier) | Visual - water injection into cavity. |
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06 | K5 | drain pump | Water level sensors (water level in steam generator) | 0 | = unsatisfied; | |
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| 1 | = satisfied | |
07 | K3, K5 | water fill solenoid | Water level sensors (water level in steam generator) | |||
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| contactor KM2 (half power, half speed); |
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08 | K3, K7 | on 20 levels only, contactor KM3 and |
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| drain cool down solenoid. |
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| contactor KM3 and drain cool down |
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09 | K3, K8 | solenoid on 6 & 10 levels; contactor |
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KM5 on 20 levels only. |
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10 | K3, K10 | contactor KM7 (convection heating |
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elements on 10 & 20 levels) |
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11 | K3, K9 | contactor KM6 |
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(convection heating elements) |
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5.t1 is displayed in the time display and the actual cavity temperature is displayed in the temperature display. Verify the probes are sensing temperature correctly. Rotate the adjustment knob and select the probe temperature to display (T1 = cavity probe (top on 20 levels); T2 = bottom cavity probe (20 levels only); T3 = cooking probe).
6.To exit the diagnostic test mode, press and hold the START key for approximately 3 seconds.
SERVICE ERROR LIGHTS
1.There are four lights at the bottom of the control. When lit, they tell the operator that the oven needs service related to the component that the light(s) represent. Refer to “TROUBLESHOOTING” for display error codes.
The lights are, from left to right.
A.Water supply.
B.Convection heat.
C.Steam generator heat.
D.Cavity fan.
NOTE: If the steam generator thermal fuse(s) or the cavity high limits open, the steam generator heat and the convection heat error lights will come on.
2.Turn the oven off and reset the oven control.
A.Programmable control - press the off key.
B.Manual controls - rotate the selector switch to the off position.
3.Correct the problem related to the service error light. See “TROUBLESHOOTING” section.
4.Turn the oven on and check operation.
A.Programmable control - press the on key, select a heating mode and press start key to begin.
B.Manual controls - rotate the selector switch to one of the three heating modes.
NOTE: On water supply errors, monitor the oven for at least 5 minutes to pass the “time out” period for the steam generator fill.
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