CAUTION
All repairs as described in this troubleshooting se ction are to be performed only after the caution procedures one through
eight listed below have been followed.
1. Check grounding before checking for possible causes.
2. Be careful of the high voltage circuit.
3. Discharge high voltage capacitor.
4. When checking the continuity of the switches or the high voltage transformer, disconnect one lead w ire from these parts
and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your
meter.
5. Do not touch any parts of the circuitry on the
P.C. Board circuit since static electric discharge may damage this control
panel. Always touch yourself to ground while working on this panel to discharge any static charge in y our body.
6. 208/230 VAC is present in the high voltage circuit board, power relay and primary circuit of low voltage transformer.
7. When troubleshooting, be cautious of possible el ectrical hazard.
Error Codes
During operation, the display may show the following service codes:
NOTE: Before scheduling service for any error codes, instruct customer to unplug oven for 1 minute,
reconnect power, and retest. If unit operates
properly, no service call is required.
Display Description Corrective Action
.draob .V.H ecalpeR draoB .V.H deliaF 1rrE
Err2 Shorted Touch Panel
Failed H.V. Board
Shorted Display Board
Shorted Cable HV to Display Board
Replace Touch Panel.
Replace H.V. board.
Replace Display Board.
Replace Cable.
.draob .V.H ecalpeR draoB .V.H deliaF 3rrE
.draob .V.H ecalpeR draoB .V.H deliaF 4rrE
Err5 Shorted Touch Panel
NOTE: If Touch Panel is pressed for more than 30 seconds, this error code
will appear.
1. Disconnect oven from power supply.
2. Disconnect side touch panel connector from display board (J5).
3. Reconnect oven to power supply.
4. If “Err5” reappears after 30 seconds, replace top touch panel.
5. If “Err5” does not reappear after 30 seconds, replace side touch panel.
.draob .V.H ecalpeR draoB .V.H deliaF 6rrE
HOT
t Open TCO (magnetron).
t Blower motor inoperative.
t Restricted air lter.
t High ambient temperature.
t Oven operated empty or with light loads.
t Broken or loose wire.
t H.V. board inoperative.
Door Door Interlock Primary Switch
t Verify latch mechanism moves freely on door.
t Verify J1 connector on display board is properly seated.
t Test interlock switch assembly and perform door adjustment if necessary.
t Replace interlock switch assembly.
!
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