Haier AU96NFTAHA Service Manual page 77

[97] Communication circuit of centralize control
Whether the
X, Y communication line are
normal
Yes
Whether the
connection of the connectors
of indoor PCB CN15 is
normal
Yes
Whether
there is improper connection
of power wiring
No
Whether the
central controller and indoor unit power
supply system have the
same system
Yes
Whether
only the central controller
displays [97]
Yes
Whether the
operation of changing central control address
is conducted from the remote
controller
No change
Whether there is noise
No
Check indoor PCB, ifimproper, replace it
No
No
Yes
No
No
Whether there is power failure
Change
Yes
Whether the
running condition of indoor unit
is reflected on the central
controller
No
Check central controller, if improper,replace it
74
Modify communication line
Modify socket wiring
Check and modify power wiring
Whether there is power
switching on portion
No
Yes
Yes
Whether there is
source of noise
No
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Yes
Switch on the
power
Yes
Eliminate
inspection code
Yes
Check and
eliminate noise
Yes