Check Procedure For Error Code Ee1, Ee2 - Sharp R-22JT Service Manual

R-22JT
A CHECK PROCEDURE FOR ERROR CODE INDICATION EE1, EE2
When the error code EE1 or EE2 is displayed, carry out following procedures and find out the defective parts. When oscillation
is unstable due to defect of upper and/or lower magnetron or defective driving circuits, error code indications EE1 or EE2
do not function properly.
[CHECK METHOD FOR ERROR CODE INDICATION]
Put water in a cup and place inside the oven inside, and operate each circuit separately.
And check working of each circuit by temperature rise of the water and judge which magnetron circuit is defect.
After judging, please replace or repair applicable part according to the troubleshooting guide in the service manual.
[CAUTION ABOUT HIGH VOLTAGE]
There is high voltage present inside, disconnect the power supply cord from the outlet before removing the outer case.
Reinstall the outer case when operate the unit.
[JUDGMENT PROCEDURE]
1]. PREPARATION FOR JUDGMENT
1. Disconnect the plug from the outlet.
2. Remove the air filter and unscrew two screws at the control panel lower holding the control panel.
3. Push up the control panel and pull it toward.
2]. [JUDGMENT PROCEDURE FOR UPPER MAGNETRON AND ITS CIRCUIT]
Disconnect the power supply cord.
Disconnect lead wires to the interlock
relay RY3 to avoid operation of lower
magnetron circuit.
Reconnect power supply
Heating for one minute.
Temperature of the water increased?
*1
Yes
EE2 should be indicated.
Upper magnetron, its driving circuit and
parts on the circuit are normal.
*1: CHECK OF TEMPERATURE RISE
Fill approx. 453 CC of water in a measuring cup and place it in the oven.
Operate the oven for one minute.
Substract cold water temperature from hot water temperature.
The result should be approx. 18 - 36F (10 - 20 deg. C).
No
If EE1 is indicated, carry out Test procedures A-J and find
out the defective part. Upper magnetron, its driving circuit
or any parts on its circuit may be defective.
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