Mitsubishi MUY-A15NA, Руководство по обслуживанию

Страница: 48 / 79

48
J J
Check of power supply
Outdoor unit does not operate. (LED display: display OFF)
Turn on power supply.
No
Yes
Yes
No
Yes
No
Yes
No
Replace the power board.
Check the connecting of parts of main power supply circuit.
Is there voltage of 208/230V AC in the
power supply terminal block?
Is the output voltage from the noise
filter P.C. board 208/230V AC?
Is the input voltage to the outdoor
electronic control P.C. board 294/325V
DC?
Check the power supply cable.
Replace the outdoor electronic control
P.C. board.
Replace the noise
filter P.C. board.
Is the input voltage to the power board
208/230V AC?
Replace the reactor.
MUZ-A24 MUY-A24
MUZ-A09/12/15/17 MUY-A15/17
Check of power supply
J
Inverter does not operate.
Disconnect the connector
(CN61) between compressor and
intelligent power module.
Turn ON power supply and press
EMERGENCY OPERATION
switch.
Check the electric
parts in main circuit.
If light up, ok.
If flash, refer to
10-3.
Is there voltage
280V ~ 370V DC
between DB61 (+) and
DB61 (–) on the
inverter P.C. board?
(Refer to 10-6.1.)
Dose LED on the inverter
P.C. board light up or
flash? (Refer to 10-6.1.)
Yes
Yes
Yes
No
No
Replace the indoor
electronic control
P.C. board.
Yes
No
No
Replace the inverter
P.C. board.
DB61
280V~370V DC
Inverter P.C. board
(Solder side)
Is there voltage 230V AC
between the indoor
terminal block S1 and
S2?
Rectify indoor/ outdoor
connecting wire.
Does the left lamp of
OPERATION INDICATOR
lamp on the indoor unit
light up?
OB451--2.qxp 06.3.29 9:49 AM Page 48