Mitsubishi SUZ-A09VR - Page 55

55
Check of power supply
J
Inverter does not operate.
Check of outdoor fan motor
I
Outdoor fan motor does not operate.
Replace the indoor
controller board.
Is there voltage 230V
AC between indoor
terminal block 2 and
N?
Replace the
outdoor fan motor.
There voltage 230V AC
between outdoor terminal
block 2 and N?
Is the resistance of fan
motor normal?
3 minutes after power
ON, is there voltage
230V AC between
CN771 2 and 3 on the
power P.C. board?
Disconnect the connector CN771 on the power P.C. board.
Disconnect the connector (CN61) between compressor and power transistor module.
[SLZ]
Turn ON the power supply and press the EMERGENCY OPERATION switch.
[SEZ]
Turn ON the power supply and press the TEST button twice.
Yes
Yes
Yes
No
No
CN771
Power P.C. board
1
2
3
Fan
motor
Outdoor terminal block
3
N
2
Check the resistance of fan motor. (Refer to page 50.)
Replace the
power P.C. board.
Rectify indoor/ outdoor
connecting wire.
No
Replace the outdoor
fan motor.
No
Yes
Indoor/ outdoor
connecting
wire
Replace the indoor
controller board.
Disconnect the connector (CN61) between compressor
and power transistor module.
[SLZ]
Turn ON the power supply and press the EMERGENCY
OPERATION switch.
[SEZ]
Turn ON the power supply and press the TEST button twice.
Check the electric
parts in main circuit.
OK.
If flash, refer to
page 47.
There voltage of 230V
AC between outdoor
terminal block 2 and N?
3 minutes after power
ON, is there voltage
280V ~ 370V DC
between LD61A (+)
and LD66A (–) on the
inverter P.C. board?
(Refer to page 66.)
Dose LED on the inverter
P.C. board light up or
flash? (Refer to page 66.)
Outdoor terminal block
3
N
2
Yes
Yes
Yes
No
No
No
Yes
No
Indoor/ outdoor
connecting
wire
Replace the inverter
P.C. board.
LD66A
LD61A
(–)
(+)
280V~370V DC
Inverter P.C. board
(Patern side)
Is there voltage 230V AC
between indoor terminal
block 2 and N?
Rectify indoor/ outdoor
connecting wire.
[SUZ-A09VR.TH SUZ-A12VR.TH]
OC304A --2qxp 04.6.29 8:34 AM Page 55