63
1 blink
2 blinks
LED1
(Green)
LED2
(Red)
1 blink
2 blinks
1 blink
2 blinks
3 blinks
4 blinks
•Negative Phase detection
•The wires of power supply and connecting
wires of indoor / outdoor units are crossed
with one another.
•51CM connector open
•Start-up time is up
•Indoor / outdoor unit connector mis-wiring
•Excessive numbers of indoor units per an
outdoor unit (five or more)
•Mis-wiring of indoor / outdoor unit connection
wires (crossed wiring or disconnection)
•Indoor / outdoor unit transmission error
(Transmitting error: Outdoor controller side)
•Indoor / outdoor unit transmission error
(Signal receiving error: Indoor controller side)
•Indoor / outdoor unit transmission error
(Transmitting error: Indoor controller side)
•Indoor / outdoor unit transmission error
(Signal receiving error :Outdoor controller side)
•Remote controller transmission error
(Transmitting error: Indoor controller side)
•Undefined error code
•Remote controller transmission error
(Signal receiving error: Remote controller side)
•Remote controller transmission error
(Transmitting error: Remote controller side)
•Remote controller transmission error
(Signal receiving error: Indoor controller side)
1
Check if the wires of power supply are connected to their
corresponding terminals on TB1.
2
Check if the wirings are correct on power supply (TB1) and
outdoor power supply board (TB2).
1
Check if the wirings are correct on the connecting wires of
indoor / outdoor units.
2
Check if a single outdoor unit connects five or more indoor
units.
1
Check if the connectors of 51CM (51C) on
outdoor controller board are disconnected.
2
Check the continuity of connector 51CM (51C) by using a
tester.
•63L connector open
1
Check connection of 63L(63L) connector on outdoor
controller board.
2
Check the 63L side of connecting wire.
3
Check refrigerant pressure.
Charge additional refrigerant.
Check continuity by tester.
Replace outdoor controller board.
4
Replace outdoor controller board.
1
Check if the wirings are correct on indoor units or remote
controllers.
2
Check if there is noise on the transmission lines of remote
controllers.
3
Turn the power off and let the units operate again to confirm.
1
Check if there is noise on the transmission lines of remote
controllers.
2
Check if there is noise on the connecting wires of
indoor/outdoor units.
3
Turn the power off and let the units operate again to confirm.
To be continued on the next page.
1
Check if the wirings are correct on the connecting wires of
indoor / outdoor units.
2
Check if there is noise on the wires of power supply and
connecting wires of indoor / outdoor units.
3
Check if there is noise on both indoor and outdoor
controller board.
4
Turn the power off and let the units operate again to confirm.
Indication (O.B)
Error Name
Inspection method
LED1 (Green)
LED2 (Red)
<Display function of inspection for outdoor unit>
• The blinking patterns of two LEDs—LED1(Green) and LED2(Red)—show the diagnoses of troubles in case of malfunction.
• By 7SEG indicator board indicates the operation mode and inspection types.
OC336--3.qxp 05.8.29 7:21 PM Page 63
