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TEST PROCEDURES
(CONT'D)
PROCEDURE
NUMBER
7
COMPONENT TEST
SHEATH HEATER TEST
Make sure the heating element is fully cooled and test the foIlowings.
a. Disconnect heater leads and measure the resistance with an ohmmeter. On the RX1 scale, the resistance between
the heater
leads should be approximately
35 ohms on Continental
Europe and South Africa Models, and
approximately
42 ohms on Australia and United Kingdom Models.
b. Disconnect
heater leads and measure the insulation resistance with 500V-lOOMs2 insulation resistance meter.
The insulation resistance between heater lead and cavity should be more than 1MsL.
8
THERMOSTAT TEST
1. Heater lamp does not light during the convection cooking. (no heater energy)
Disconnect
the wire leads from the thermostat
terminals and connect the ohmmeter leads between the termi-
nals. The meter should indicate a closed circuit.
If it indicates a open circuit, replace the thermostat.
2. Heater lamp does not turn off when oven temperature seems to be reached at the set temperature.
(Heater energy does not be deenergized)
Set the temperature
control knob at the 25O'C position and keeps it aging for 15 minutes. After 15 minutes,
on setting the temperature
control knob at approx. 200°C position, the heater lamp will turn on or off after
approx. 5 minutes.
If the heater lamp should not turn on/off in this case, replace the thermostat.
9
CAM SWITCH TEST
This switch is mounted to the thermostat and turned on and off by temperature control knob and cam.
Disconnect the 6-pin connector from the main wire harness, and Red wire leads from the thermostat terminal.
Connect the ohmmeter leads to the common (COM) and normally open (NO) terminals of the switch.
The meter should indicate an open circuit with set the temperature
control knob at 40°C position and a closed
circuit with set the temperature control knob at 90°C position.
When the meter leads connect to the common (COM) and normally closed (NC) terminals of the switch, it should
indicate a closed circuit with set the temperature
control knob at 40°C position, and an open circuit with set the
temperature control knob at 90°C position.
In case improper operation is indicated, replace the defective switch.
10
MONITOR SWITCH TEST
(Australia and United Kingdom)
Before performing this test, make sure that the Upper and Lower Latch Switches are operating properly refer to the
Test Procedure 3 and 4.
Connect one ohmmeter lead to one of the fuse terminals, and the other lead to the power transformer
terminal to
which the white wire from the wiring harness is connected.
When the door is open, the meter should indicate a close circuit.
When the switch actuator of the upper latch hook is pushed by the screw driver through the upper 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 and open circuit.
In case improper operation is indicated, replace the defective switch.
POWER
TRANSFORMER
/
/
UPPER
LATCH
ACTUATOR
23
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