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Press OPERATE/STOP (ON/OFF) button of the remote
controller (the set temperature is displayed) with the
remote controller headed towards the indoor unit. 1
Expansion valve operates in full-opening direction.
OK
NOTE: After check of LEV, do the undermentioned operations.
1. Turn OFF the power supply and turn it ON again.
2. Press RESET button on the remote controller.
1. Regardless of normal or abnormal
condition, a short beep is emitted once
the signal is received.
Measure each voltage between connector
pins of CN724 on the inverter P.C. board.
1. Pin
(-) — Pin (+)
2. Pin (-) — Pin (+)
3. Pin (-) — Pin (+)
4. Pin (-) — Pin (+)
Is there about 3 ~ 5 VAC between each?
NOTE: Measure the voltage with an analog
tester.
Properly fi x the LEV coil to the expansion valve.
Replace the inverter P.C.
board.
Replace the LEV coil.
Replace the expansion valve.
Is LEV coil properly fi xed to
the expansion valve?
Does the resistance of LEV
coil have the characteristics?
(Refer to 11-4.)
Do you hear the expansion valve "click,
click·······"?
Do you feel the expansion valve vibrate
on touching it ?
Turn ON the power supply.
<Preparation of the remote controller>
While pressing both OPERATION SELECT button
and TOO COOL button (MSZ-GE25/33/35/42/50)/
TEMP
button (MSZ-GE60/71/80VA) on the remote
controller at the same time, press RESET button.
First, release RESET button.
Hold down the other two buttons for another 3 sec-
onds. Make sure that the indicators on the LCD
screen shown in the right fi gure are all displayed.
Then release the buttons.
Yes
No
No
Yes
No
Yes
No
Yes
K Check of LEV (Expansion valve)
MSZ-GE25/33/35/42/50VA
MSZ-GE35/50VA2
MSZ-GE25/35/42/50VAD
MSZ-GE60/71/80VA
MSZ-GE80VA2
MSZ-GE60/71/80VAD
OBH532E