30
Test 6
Heater switch test - Electric Type
Disconnect the YL3, black tab
relay and white tab relay
connectors at the main PCB.
Measure the resistance between
YL3-3 (WH) and the YL wire on
the black tab relay connector. Is
the resistance 18-22
Ω
?
Measure the resistance
between YL3-3 (WH) and
the BL wire on the white
tab relay connector. Is the
resistance 18-22
Ω
?
• Check wiring
and
connectors to
the element.
• See element
component
test.
• Check wiring
and connectors
to the element.
• See element
component
test.
• Check wiring
and connectors
to the element.
• See element
component
test.
• Check power
supply.
• Replace the
element.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Measure the resistance between
the YL wire on the black tab relay
and the BL wire on the white tab
relay connectors. Is the
resistance 36-44
Ω
?
Measure the resistance
between terminals 1 (RD)
and the heater housing. Is
the resistance
Ω
?
Refer to the hi-limit thermostat and
thermal cut off component tests.
Enter diagnostic mode and
press the START/PAUSE
button twice. Measure the
voltage between YL3- 3
(WH) and the YL wire on
the black tab relay. Is the
voltage 240 VAC?
Others
Only for CHECK VENT model
Wires
•L2(Red)
•L2D(White) : Go to the duct(YL3 in main
pcb)
•L2S(White) : Go to the safety.
YL3
