Electrolux EI30MH55GB Service Manual - Page 21

PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST EI30MH55GSA EI30MH55GBA EI30MH55GWA (6) Touch the " START " button. (7) The oven is in Easy defrost cooking condition. (8) The oven will operate as follows. Menu 1ST STAGE 2ND STAGE Steaks/Chops LEVEL TIME LEVEL TIME 0.5lbs 40% 57sec. 40% 22sec. (9) If improper operation is indicated, the control unit is probably defective and should be checked. N FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs. 1) Disconnect the power supply cord. 2) Open the door and block it open. 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Remove the control unit, referring to the procedure of " CONTROL PANEL ASSEMBLY, CONTROL UNIT AND KEY UNIT REMOVAL ". 5) Follow the troubleshooting guide given below for repair. STEPS 1 2 OCCURRENCE Only pattern at "a" is broken. Pattern at "a" and "b" are broken. CAUSE OR CORRECTION *Insert jumper wire J1 and solder. *Insert the coil RCILF2003YAZZ between "c" and "d". 6) Make a visual inspection of the varistor. Check for burned damage and examine the transformer with a tester for the presence of layer shortcircuit (check the primary coil resistance which is approximately 160Ω ± 10%). If any abnormal d c condition is detected, replace the control unit. 7) Reconnect all leads removed from components b during testing. 8) Re-install the control unit to the control panel a and re-install the control panel to the oven. 9) Reconnect the power supply cord. 10) Run the oven and check all functions. 2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished. 1) Disconnect the power supply cord, and then remove outer case. Refer to procedure of "HOOD LOUVER REMOVAL", "REMOVAL OF OVEN FROM WAL " 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) Follow the troubleshooting guide given below for repair. STEPS 1 2 OCCURRENCE The rated AC voltage is not present between the Pin No. 3 of the 3 pin connector (C) and the normal open terminal of the relay RY1. The rated AC voltage is present at primary side of low voltage transformer. CAUSE OR CORRECTION Check supply voltage and oven power cord. Low voltage transformer or secondary circuit defective. Check and replace the control unit. 21