Whether
there is AC220V
voltage between of
indoor unit group
terminal block
Whether
there is AC14V
voltage between of
indoor unit terminal
block
Whether
there is AC14V voltage
between of remote
controller
terminal
53
*1
A
*2
1
B
A
B
L
N
2
1
2
1
2
No No No
No
Check the powercord betweenindoor unit group
Yes
Whether
the 5 A fuse is
normal
Fuse is improper
PCB in the remotecontroller is improper
Yes Yes
Mismatching line betweenof indoor unit groupremote controllers
Yes
Whether
LED (green, orange)
on the PCB of indoor unit
group
flashes
No
No
Yes
Yes
Indoor transformer is improperPCB of indoor unit is improper
Whether
CN12 is connected
( Main unit )
Connect CN12
Indoor transformer is improperWire around PCB of indoor unitis broken, improper plugging ofsocket
Whether
the remote controller
displays inspe-
ction code
"89"
No No
Whether
the remote
controller displays
inspe-ction code
"E6"
Whether
the HP of
indoor unit conducting
cool/heat
running reaches
0.8 HP
No
Prior to
heat mode,
selecting non-prior
mode (cool) or running
mode is different from
selecting switch
mode
Yes YesYes
Yes
No
The total of connectingindoor unit groupexceeds the capacity
The power phasesequence of outdoorunit is abnormal
Wrong setting of HPof indoor unit group
Indoor unit group is abnormalPCB is improperRemote controller is improper
Normal
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