23
OCH699
J Check of power supply
Is there voltage 208/230 VAC
between the indoor terminal
block S1 and S2?
No
Yes
Replace the indoor
electronic control P.C.
board.
Rectify indoor/outdoor
connecting wire.
Yes
If light up, OK.
If blink, refer to "10-3. HOW TO
PROCEED "SELF-DIAGNOSIS"".
Does the POWER lamp on remote
controller light up?
Does LED on the inverter P.C. board
light up or blink? (Refer to "10-6.TEST
POINT DIAGRAM AND VOLTAGE.")
No
Replace the inverter
P.C. board.
Is there bus-bar voltage 260-370 VDC
EHWZHHQ'%DQG'%±RQ
the inverter P.C. board? (Refer to "10-
6.TEST POINT DIAGRAM AND VOLTAGE.")
No
Check the electric parts in main circuit.
Yes
Yes
No
Disconnect the connector between
compressor and intelligent power
module.
Turn ON power supply and press
the TEST button twice on the indoor
unit or remote controller.
Inverter P.C. board
(Solder side)
DB61
260-370 VDC
K Check of LEV (Expansion valve)
Turn on power supply to the outdoor unit after checking
/(9FRLOLV¿[HGWRWKH/(9ERG\VHFXUHO\
Yes
Disconnect the connector CN724 is there
normal resistance to LEV coil? (Refer to 10-4.
TROUBLE CRITERION OF MAIN PARTS)
No
Replace the inverter P.C. board.
Replace the LEV coil.
No
Normal
Start
Is "click - click" sound heard?
Or, do you feel vibration of the LEV coil with a hand?
Yes
