Electrolux MCC4060E Service Manual page 23

PROCEDURE
LETTER
E
F
G
Interr. termico TC01 145°C
Interr. termico TC02 170°C
Interr. termico TC03 170°C
SOI 12.06 FV
TEST PROCEDURES
SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the
terminals as described in the following table.
Table: Terminal Connection of Switch
Plunger Operation COM to NO
Released Open circuit
Depressed Short circuit
If incorrect readings are obtained, replace the switch.
CARRY OUT 4R CHECKS.
THERMISTOR TEST
CARRY OUT 3D CHECKS
Disconnect the connector B from CPU unit. Measure the resistance of the
thermistor with an ohmmeter. Connect the ohmmeter leads to Pin No's C1 and
C3 of the thermistor harness.
Room Temperature
20°C - 30°C
If the meter does not indicate above resistance, replace the thermistor.
CARRY OUT 4R CHECKS
THERMAL CUT OUT TEST
CARRY OUT 3D CHECKS
Disconnect the leads from the terminals of the thermal cut-out. Then using an
ohmmeter, make a continuity test across the two terminals as described in the
below.
Denominazione parte
If incorrect readings are obtained, replace the thermal cut-out.
An open circuit thermal cut-out (MG) TC01 indicates that the magnetron has
overheated, this may be due to restricted ventilation, cooling fan failure.
An open circuit thermal cut-out (GRILL) TC02 indicates that the oven cavity has
overheated, this may be due to no load operation.
An open circuit thermal cut-out (CONV.) TC03 indicates that the convection fan
winding has overheated, this may be due to restricted ventilation or locked
cooling fan or locked convection fan motor.
CARRY OUT 4R CHECKS
COMPONENT TEST
COM to NC COM; Common terminal
Short circuit NO;
Open Circuit NC;
Approximately 359.9
Table: Thermal Cut-out Test
Temperatura in
condizione "ON" condizione "OFF"
(circuito chiuso). (°C) (circuito aperto). (°C)
This is not
reset able type
Below 155°C
Below 155°C
23/43
Normally open terminal
Normally close terminal
Resistance
kΩ - 152 kΩ
Temperatura in Indication of ohmmeter
(When room temperature
is approx. 20°C.)
Above 125°C Closed circuit
Above 170°C Closed circuit
Above 170°C Closed circuit
599 37 42-75