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10.3.1.2 Indoor / outdoor units communication error
Start: Power off , then Power on the
A/C by the Breaker. (reconnect the
power wire). Is it still displaying the
error code?
Yes
Check wiring on the outdoor and indoor
terminal follow the wiring diagram. Is all
No
connecting correctly?
Yes
No
Reconnect
Turn on all indoor unit by remote
No
controller. Is all indoor unit display
Measure Vs,
alternately betw
and negative value? (Vs is the
No
voltage between S and N). Refer
PIC 1
terminal and Indoor PCB
connect ok?
Yes
Yes
Yes
Yes
Turn off the all indoor units. Is IPM
power LED or operating LED lamp
No
On? Refer PIC2
Yes
Power on by remote
controller, IIs it still
displaying the error code
after 3 minutes?
Is main board
“
”
lamp on? Refer PIC 3.
Is the reactor connecting
No
well
？
No
Yes
No
Yes
Is indoor units number correct? Check
on the outdoor check point . (2 for dual
zone, 3 for tri zone, 4 for qua zone,5 for
qui zone). Refer PIC 4.
Trouble is solved
No first time
No second time
Replacee outdoor unit PCB assembly(include
wiring) totally
Replace the outdoor main PCB
Reconnect the wiring
Indoor / outdoor units communication error
A
Reconnect the wiring
Replace IPM board or
the outdoor main PCB
Replace the Indoor PCB
the wiring
is it moving
een positive value
No
A
:
Is all the wiring between
