ZMM Haskovo Joybook R48 Series Service Manual download pdf (Page 17)

PMOR3021S

PMOR3021B

PMOR3021R

TEST PROCEDURES

PROCEDURE

LETTER

COMPONENT TEST

4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal

of the switch. The meter should indicate an open circuit with the door open and a closed circuit with

the door closed. If improper operation is indicated, replace the stop 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.

NOTE: If the stop switch contacts fail in the open position and the door is closed, the cooling fan motor,

stirrer motor and oven light will be activated by RY1.

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. To discharge high voltage capacitor, wait for 60 seconds.

4. Before performing this test, make sure that the secondary interlock switch and the primary interlock

switch are operating properly, according to the above Switch Test Procedure. Disconnect the wire

lead from the monitor switch (COM) terminal. Check the monitor switch operation by using the

ohmmeter as follows. When the door is open, the meter should indicate a closed circuit. When the

monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate

of the oven cavity with the door opened (in this condition the plunger of the monitor switch is pushed

in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be

defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM)

terminal and check the continuity of the monitor circuit.

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.

F MONITOR SWITCH TEST

1. Disconnect the power supply cord, and then remove outer case.

2. Open the door and block it open.

3. To discharge high voltage capacitor, wait for 60 seconds.

4. If the monitor fuse is blown when the door is opened, check the primary interlock switch, secondary

interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before

replacing the blown monitor fuse.

CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE PRIMARY INTERLOCK

SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER

OPERATION.

If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must

be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA016/KIT, even if

the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised

of a 20 ampere fuse and switch.

5. Reconnect all leads removed from components during testing.

6. Re-install the outer case (cabinet).

7. Reconnect the power supply cord after the outer case is installed.

8. Run the oven and check all functions.

G BLOWN MONITOR FUSE TEST

Secondary

Interlock

Switch

Monitor

Switch

Screw Driver

Ohmmeter

Black

White

/Blue

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ZMM Haskovo Joybook R48 Series Service Manual Page 17

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