83
How to check mis-wiring and serial signal error
Q
When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once.
Outdoor unit doesn’t operate.
1. Turn OFF the power supply.
2. Turn ON the power supply.
3. Press the EMERGENCY OPERATION switch.
Is the self-check function of indoor unit indicated when 52C turns ON
three minutes later?
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1
Short circuit of JPG and JPS on the indoor electronic control P.C. board
enables self-check to be displayed in three seconds.
Is there indoor-outdoor mis-wiring,
poor contact, or wire disconnection?
Is there approx. 325V DC between TAB 63(+) and
TAB 64(-) on outdoor electronic control 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 or
serial signal error
indicated when
52C turns ON
three minutes
later?
Is there 325V DC between both ends of
smoothing capacitor (C63) in the main circuit?
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3 Replace the outdoor
electronic control P.C.
board.
Does the OPERATION INDICATOR lamp flash
on and off when OPERATE/STOP(ON/OFF)
button on the remote controller is pressed?
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1 If there are any error in
serial signal system, the
mis-wiring indication will
appear by turning the
power OFF and then
turning it back.
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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.
Mis-wiring indication
No
No
Yes
Repair wiring.
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3 Rectify indoor/ outdoor connecting wire.
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3 · Reactor
· Diode stack
· Power-factor
capacitor
· Smoothing
capacitor
· Fuse
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
.
While pressing OPERATE-STOP(ON/ OFF) 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 10V 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.
2.5 seconds OFF
ON
ON
Serial signal error indication
defective
Yes
No
Yes
Yes
No
Yes
No
Yes
No
(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.
•The following indication
applies regardless of shape
of the indicator.
flashing
Operation Indicator
OB245--3qxp 02.10.22 4:15 PM Page 83