60
Does compressor or
outdoor fan motor stop?
Replace the outdoor
control P.C. board.
Yes
OK
No
Replace the indoor
electoronic control
P.C. board.
Start
Turn OFF the power supply.
After 1 minute, turn ON
power supply again.
Is there 12V DC between
1–2 on the outdoor
terminal block (TB2 or TB3)?
No
Yes
BB
Check of outdoor unit
Compressor and / or outdoor fan doesn’t stop.
CC
Check of MU & MUX TYPE / MUH & MXZ TYPE SWITCH OVER
Start
Turn OFF the power supply (indoor / outdoor unit).
Set switch (SW2-2) on the indoor electronic
control P.C. board to MUX type. w1
Does the unit operate?
OK
Yes
No
Refer to the
"Instruction of
troubleshooting."
w 1 Set the switch (SW2-2) on indoor electronic control P.C. board to
MUX type, when the outdoor unit is MUX type.
If the setting is MUH or MXZ type, the unit does not work.
Refer to MU & MUX TYPE / MUH& MXZ TYPE SWITCH OVER
on service manual OB393 or OB385.
When OPERATION INDICATOR lamp flashes 0.5-second intervals.
Outdoor unit doesn’t operate.
OB384--2.qxp 05.1.17 13:09 Page 60
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