ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
3.The DISPLAY and LED test consists of flashing all displays and LED’s. The word “test” will flash intermittently as the temperature display is tested. Verify all the DISPLAYS and LED’s are flashing. This test will continue until a key is pressed to advance to the next step.
4.The RELAY test consist of selecting a particular relay by its code number (01 to 11) with the TEMP UP and TEMP DOWN keys. The initial code displayed in the temperature display is 01 for relay K1. Press the TEMP key to energize the selected relay for a maximum of 2 seconds. Verify that each selected relay (K1 to K10) is functioning. See table below. To exit this test and proceed to the next, press the OFF key.
CODE | RELAY | COMPONENT | |
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01 | K1 | door motor | |
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02 | K2 | cavity vent motor | |
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03* | K6 | contactor KM1 (half power, full speed) | |
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04 | K3 | cooling fan(s) and door light only | |
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05 | K3, K4 | water injection solenoid (humidifier) | |
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06 | K5 | drain pump | |
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07 | K3, K5 | water fill solenoid | |
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| contactor KM2 (half power, half speed); | |
08* | 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 | |
09* | K8 | solenoid on 6 & 10 levels; | |
contactor KM5 on 20 levels only | |||
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| (steam generator heating elements) | |
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10* | K10 | contactor KM7 | |
(convection heating elements) | |||
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11* | K9 | contactor KM6 | |
(convection heating elements) | |||
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NOTE: Asterisk (*) indicates relay is checked but contactor not engaged. No noticeable external component operates.
5.The keypad test consist of pressing each key to check its functionality. Initially, 02 is displayed in the time display and “test” is displayed in the temperature display. With each successful key press, the number of the key is displayed in the time display. Each key is numbered, starting with number 01 (ON) in the upper left corner of the control and ends at 21 (humidifier) on the lower right corner. See table below. Verify that all keypad buttons are functioning properly.
KEY | NO. |
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ON | 01 |
| TEMP | 12 |
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OFF | 02 |
| TEMP DOWN | 13 |
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HOT AIR | 03 |
| TEMP UP | 14 |
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STEAM | 04 |
| DELTA T | 15 |
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COMBI | 05 |
| PROG | 16 |
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START/STOP | 06 |
| ENTER | 17 |
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PHASE | 07 |
| ENTER DOWN | 18 |
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TIME | 08 |
| ENTER UP | 19 |
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TIME DOWN | 09 |
| FAN SPEED | 20 |
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TIME UP | 10 |
| HUMIDIFIER | 21 |
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PROBE | 11 |
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6.To exit the diagnostic test mode, press and hold the OFF key for approximately 3 seconds.
CONFIGURATION MODE -
MANUAL CONTROLS
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.
1.Remove the rear panel as outlined under
“COVERS AND PANELS”.
2.Identify the type of convection fan motor(s) on the oven before setting the motor values in step 9 and 10.
3.Reverse procedure to install.
4.
The configuration mode can be entered only when the oven is OFF. Returning to the normal operating mode can be done at any time by pressing the START key to save the configuration settings and exit the configuration mode.
To Perform:
1.To enter the configuration mode press the TIME and TEMP keys simultaneously for 3 seconds. In the temperature display, “Conf” will be displayed. Press the TIME key to advance to the next step.
2.C and F will be displayed in the time display. Rotate the adjustment knob counterclockwise for Celsius and clockwise for Fahrenheit. The blinking letter indicates the temperature scale selected. Accept the selection by pressing the TIME key to advance to the next step.
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