Operation check of the solenoid valve.
P
48
Do you hear the operation sound
(click sound) of the solenoid valve
every 5 seconds?
Disconnect CN923 and measure the voltage
between CN923
1
and
2
using tester.
Replace the solenoid
valve coil.
Are the cords between CN726, CN727 on the
outdoor power P.C. board and CN725 on the
outdoor inverter P.C. board firmly connected
without disconnection or loose connection?
Yes
No
Yes
No
Yes
Yes
No
No
Yes
No
No
Yes
Set the failure mode recall function.(Refer to 11-2.)
The solenoid valve is normal.
Check the ambient temperature
thermistor (RT65) in the outdoor unit.
(Refer to 11-6.
G
)
Correct the connection.
Replace the solenoid
valve.
Trouble of the solenoid valve or
solenoid valve coil.
Are the connectors for solenoid valve coil
firmly connected without disconnection or
loose connection?
Does it repeat to go 0V and 230VAC at 5
second interval?
Correct the connection.
Measure the voltage between CN725
8
(+)
and
2
(GND) on the inverter P.C.
board.
Does it repeat to go 0V and 12VDC at 5
second interval?
Measure the resistance of solenoid
valve coil.
Is the resistance normal ?
(Refer to 11-5)
Replace the inverter P.C. board.
Replace the power P.C. board.
When the cool air does not blow out from the indoor unit in Low Outside Temperature Operation, or the condensed
water drops from the indoor unit.
MUZ-GA25VA-
/
/
(Serial No. ~6021350T)
MUZ-GA25VAH-
/
/
(Serial No. ~7000000T)
E3
E2
E1
E3
E2
E1
OB379C--2qxp 07.2.1 2:28 PM Page 48
