134
Check of outdoor unit
D
Compressor and / or outdoor fan does not operate.
No.
No.
No.
No.
Start
No
Check the voltage to terminal block of
outdoor unit. Is there AC220~240V to
terminal block between
L
-
N
?
No
Yes
Check the outdoor power supply,
power supply cord and connection.
Yes
Outdoor unit does not
operate.
Check the DEICER
P.C. board. See page 145.
Is it normal?
Change the switch
(SW2-
2
) on the indoor
electronic control P.C.
board to MUH type.
See page 29.
Compressor
does not operate.
No
Yes
Is the connection of
wiring from terminal block
to compressor correct?
Check the compressor.
See page 131.
Is it normal?
Make the connection of
wiring from terminal
block to compressor
correct.
Outdoor fan motor
does not operate.
Yes
Is the connection of wiring
from terminal block to
outdoor fan motor correct?
Make the connection
of wiring from terminal
block to outdoor fan
motor correct.
Yes
No
Replace the compressor.
Check the outdoor fan
motor. See page 131.
Is it normal?
Replace the outdoor
fan motor.
No
Yes
Check the DEICER
P.C. board.
See page 145.
Check the DEICER
P.C. board.
See page 145.
Is the switch(SW2-
2
) on the
indoor electronic control
P.C. board set to MUH type?
Does outdoor unit operate?
Yes
Ok
Does outdoor unit operate?
Yes
Ok
Does outdoor unit operate?
Yes
Ok
Ok
Yes
Check the compressor
and outdoor fan motor.
See page 131.
No
<MUH-07/09/12RV>
Compressor and outdoor fan do not operate.(Only indoor fan operates.)
Press EMERGENCY ON/OFF button.
3-minute time delay works.
Test mode operates for 30 minutes.
Check the outdoor fan motor , compressor , relay ,
and wiring.
Check the connection of indoor and outdoor
and the power supply.
Check continuity of indoor and outdoor unit connection.
No
No
Yes
Replace the fuse.
Check of outdoor unit
D
Check voltage to terminal block of outdoor unit. Is
there 220-240V AC to terminal block between
L
L
-
N
N
?
Check voltage to terminal block of indoor unit. Is
there DC12V to terminal block between
2
2
-
1
1
?
Check the fuse. Is it cut?
Yes
Yes
No
Start
<MUX-10/18/24RV>