16
How to check mis-wiring
D
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn’t operate.
Is there voltage approx. 280V DC between LD61A
(+) and LD66A (–) on the inverter P.C. board?
Is there approx. 230V AC between outdoor
terminal block
2
and
N
when EMERGENCY
OPERATION switch is pressed three minutes
after turn OFF the power supply and then turn
ON again?
Is mis-wiring
indicated when
52C turns ON
three minutes
later?
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3 Replace the outdoor
electronic control P.C.
board.
Does the OPERATION INDICATOR lamp flash
quickly when OPERATE/STOP(ON/OFF) button
on the remote controller is pressed?
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2 Mis-wiring may damage indoor electronic
control P.C. board during the operation in
the left. Be sure to confirm the wiring is
correct before the operation starts.
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3 Replace the
indoor electronic
control P.C.
board.
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3 Be sure to release the failure-mode
recall function after checking.
No
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3 Rectify indoor/ outdoor connecting wire.
Yes
A
B
Turn OFF the power supply and confirm that indoor/
outdoor connecting wire is correct.
Short-circuit indoor terminal block
N
and
3
.
During pressing the OPERATION SELECT button and
TOO COOL button on the remote controller, press the
RESET button.
(The above procedure allows OPERATION INDICATOR
lamp to indicate the failure-mode.)
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2
Open-circuit indoor terminal block
N
and
3
,
Check if there is amplitude of 5 to 20V DC between
outdoor terminal block
N
and
3
(for confirmation of serial
signal) and if there is 230V AC between
2
and
N
.
1. Turn OFF the power supply.
2. Disconnect the connector between the compressor and
the transistor module.
3.Turn ON the power supply.
4. Press the EMERGENCY OPERATION switch.
Yes
No
Yes
No
Yes
No
Yes
(light up or OFF)
· Turn OFF inverter-controlled lighting
equipment.
· Turn OFF the power supply and then
turn ON again.
· Press the EMERGENCY
OPERATION switch.
A
B
· Reinstall the
unit away
from light.
· Attach a filter
on receiving
part.
Procedure of release of failure-mode
1
Press the EMERGENCY
OPERATION switch.
2
Turn OFF the power supply and
then turn ON again.
3
Press the RESET button on the
remote controller.
Start
No
• Turn ON the power supply.
• Press once EMERGENCY OPERATION switch.
Is this mis-wiring, poor contact,
or wire disconnection?
Make them sure.
Yes
After three minutes, mis-wiring is indicated
(0.5-second ON, 0.5-second OFF)
on OPERATION INDICATOR
lamp on indoor unit.
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w
Short circuit of JPG and JPS on the indoor
electronic control P.C. board enables
self -check to be displayed in 3 seconds.
•The following indication
applies regardless of shape
of the indicator.
Flashing
Operation Indicator
As for outdoor unit, refer to service manual OB328 or OB319.
OB327 --1qxp 04.1.8 1:42 PM Page 16
