Electrolux EI30MH55GB Service Manual - Page 20

EI30MH55GSA EI30MH55GBA EI30MH55GWA PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST schematic and place a jumper wire between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method may be used (after clearing the control unit) to determine if the control unit or key pad is at fault. 6. Reconnect all leads removed from components during testing. 7. Re-install the control panel assembly. 8. Reconnect the power supply cord. 9. Run the oven and check all functions. G5 G6 G7 G8 G9 G10 G11 G12 G1 G2 G3 G4 0 5 4 START/ add a minute 8 1 power level 6 3 cook dinner recipes defrost 2 quick user breakfast pref melt fan 7 9 timer/ clock popcorn STOP clear soften warm reheat express lunch keep warm light CN-G KEY UNIT L RELAY TEST 1. Disconnect the power supply cord, and then remove outer case. Refer to procedure of "HOOD LOUVER REMOVAL", "REMOVAL OF OVEN FROM WALL" and "OUTER CASE REMOVAL". 2. Open the door and block it open. 3. To discharge high voltage capacitor, wait for 60 seconds. 4. Remove the hood intake duct R. 5. Disconnect the leads to the primary of the inverter unit. 6. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape. 7. After that procedure, re-connect the power supply cord. 8. Check voltage between the Pin No. 3 of the 3 pin connector (C) and the normal open 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. RY1, RY3, RY4, RY5 and RY6 Relay 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, control unit is defective. RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS RY1 Approx. 25.0V D.C. Inverter unit/ Oven lamp/ Fan motor/ Stirrer motor RY3 Approx. 25.0V D.C. Hood motor (High/ Low seclection) RY4 Approx. 25.0V D.C. Hood motor RY5 Approx. 25.0V D.C. Hood lamp RY6 Approx. 25.0V D.C. Hood lamp 9. Disconnect the power supply cord. 10. Open the door and block it open. 11. To discharge high voltage capacitor, wait for 60 seconds. 12. Reconnect all leads removed from components during testing. 13. Re-install the hood intake duct R. 14. Re-install the outer case (cabinet). 15. Reconnect the power supply cord after the outer case is installed. M EASY DEFROST TEST (1) Open the door. (2) Place one cup of water in the center of the turntable tray in the oven cavity. (3) Touch the "EASY DEFROST" pad once. And then touch the number pad " 2 ". (4) Touch the number pad " 5 ". (5) Close the door. 20