Electrolux EW27MO55HSA Technical & Service Manual page 25

Procedure
Letter
BLOWN MONITOR FUSE TEST
H
1. Disconnect the power supply cord, and then 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. If the monitor fuse is blown when the door is opened, check the primary interlock switch, door
sensing relay (RY1), and monitor switch according to the "TEST PROCEDURE" for those
switches before replacing the blown monitor fuse.
If the monitor fuse is blown by improper switch operation, the monitor fuse and switch
must be replaced with "monitor fuse and switch assembly" part number FFS-BA012WRK0,
even if the monitor switch operates normally. The monitor fuse and switch assembly is
packed with 20 ampere fuse and switch.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
OVEN THERMAL CUT-OUT (on the side of steam duct)
I
1. Disconnect the power supply cord, and then 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. A continuity check across the thermal cut-out terminals should indicate a closed circuit
unless the temperature of the thermal cut-out reaches approximately 302°F (150°C).
The thermal cut-out reset automatically at approximately 266°F (130°C). If the thermal cut-out
has operated under the normal condition, replace the thermal cut-out. An open thermal cut-out
indicates overheating of the oven cavity.
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOISE FILTER TEST
J
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. Using an ohmmeter, check between the terminals as described
in the table below. If incorrect readings are obtained, replace
the noise filter.
6. Reconnect all leads removed from components during testing.
7. Reinstall the outer case (cabinet).
8. Reconnect power supply cord after the outer case is installed.
9. Run oven and check all functions.
Troubleshooting and Testing
Component Test
MEASURING POINT
Between N and H
Between terminal N and GRAY
Between terminal H and RED
3-7
NOISE FILTER
N
FUSE 20A
NOISE SUPPRESSION COIL
LINE CROSS CAPACITOR
0.22µF / AC 250V
LINE BYPASS LINE BYPASS
CAPACITOR CAPACITOR
0.0033µF / AC 125V 0.0033µF / AC 125V
GRY RED
INDICATION OF OHMMETER
Open circuit.
Short circuit.
Short circuit.
H