65
How to check mis-wiring
H
1. Turn OFF the power supply and disconnect only terminal block
3
of in-out
connecting wire on indoor side.
2. Short-circuit terminal block
N
-
3
by lead wire.
3. Turn ON the power supply and press once EMERGENCY OPERATION switch.
During EMERGENCY OPERATION, is there
10V DC between both ends of R601on the
deicer P.C. board? (Refer to page 70.)
(By tester, the stylus is between 5 ~10V)
Start
No
No
Is there 1V DC between both ends of
PS132 on the indoor electronic control P.C.
board ?
( By tester, the stylus is between 0 ~ 1V. )
• Turn ON the power supply.
• Press once EMERGENCY OPERATION switch.
Is this mis-wiring, poor contact,
or wire disconnection?
Make them sure.
Replace the indoor electronic
control P.C. board.
Is there 220-240V AC between
L
-
N
on the outdoor terminal block?
No
Check the outdoor power supply
and connection of wiring.
Is there 5V DC between J101 + -J401 -
on the deicer P.C. board?(Refer to page 70.)
Yes
No
Replace the deicer P.C. board.
Yes
No
Make the wiring between CN730
on the deicer P.C. board and
outdoor terminal block correct.
(Refer to page 70.)
Replace the deicer P.C. board.
Yes
Yes
Yes
After 3 minutes, mis-wiring is indicated
(0.5-second ON, 0.5-second OFF)
on OPERATION INDICATOR
lamp on indoor unit.
w
w
Short circuit of JPG and JPS on the indoor electronic control
P.C. board enables self -check to be displayed in 3 seconds.
• Turn OFF the power supply.
• Disconnect the lead wire that terminal
block
N
-
3
is short-circuited.
• Connect ON in-out connecting wire.
Turn ON the power supply.
<MSH-30RV>
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.
Outdoor unit doesn’t operate.
OB272-3.qxp 02.1.26 1:24 PM Page 65
