Electrolux EI30SM55JB Technical & Service Manual page 33

Procedure
Letter
RELAY TEST
N
1. Disconnect power supply cord, and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
6. After that procedure, re-connect the power supply cord.
7. Remove the outer case and check voltage between Pin No. 1 of the 3 pin connector (A) and the
oven side terminal of the relay RY1 on the control unit with an A.C. voltmeter. The meter should
indicate 120 volts, if not check oven circuit.
Shut-off, Cook and Heater Relays Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated ................ Defective relay.
DC. voltage not indicated .......... Check diode which is connected to the relay coil. If diode is good,
8. If any abnormal condition is defected, replace the control unit.
9. Disconnect the power supply cord and then remove outer case.
10. Open the door and block it open.
11. Discharge high voltage capacitor. (See Warnings and Instructions on page 3-1)
12. Reconnect all leads removed from components during testing.
13. Re-install the outer case (cabinet).
14. Reconnect the power supply cord after the outer case is installed.
15. Run the oven and check all functions.
Troubleshooting and Testing
Component Test
control unit is defective.
3-11