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Does the Operating LED of indoor unit blink
when Operation's ON?
Is the Connection between indoor power
relay Pin ➂ and terminal block No. 1 right?
Refer to the self-diagnosis function.
The Outdoor Unit does not operate at all.
Trouble 6
YES
Check the connecting state of connector
NO
NO
Is the connection of cable between indoor
and outdoor unit right?
Indoor Outdoor
1(Brown) 1(Brown)
2(Blue) 2(Blue)
3(Green/YL) 3(Green/YL)
4(Red) 4(Red)
NO
YES
Is the voltage of CN-POWER ➀ , ➁ in
outdoor PCB Ass'y about AC220V / 240V
when Operation's ON?
Check the Fuse of Outdoor PCB Ass'y.
NO
YES
Is the voltage of CN-AC ➀, ➂ in outdoor
PCB Ass'y about AC220V / 240V?
Check the PTC and RY-PWR.
NO
YES
Is the Bridge Diode(DB01Z) right?
Replace the Bridge Diode.
NO
YES
Replace the PCB Ass'y.
NO
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