Haier AD96NAHAEA - Page 63

Commercial Air Conditioner Model: AU96NATAEA
AD96NAHAEA, AP96NACAEA
63
E2 Indoor coil temp. sensor abnormal
E3 Outdoor ambient temp. sensor abnormal
E4 Outdoor coil temp. sensor abnormal
E5 Over current protection
E6 High/low pressure protection
E8 Communication abnormal between panel and
indoor unit
E9 Communication abnormal between outdoor
and indoor unit
Diagnose and troubleshooting
1) No display on LCD of wired controller, and the unit not running

yes
start
if LED on PCB is
lighted on
if there is voltage output at
primary side of transformer of
indoor PCB
yes
yes
no
if there is 12V voltage
between A and B,C,D
of wired controller
no
no
change or
repair wired
controller
check if the power cable,
communication wire of
indoor/outdoor are
connected correctly
if there is 220VAC
on the power input
side of indoor PCB
change wired
controller
check ther power
terminal block
yes
yes
yes
yes
yes
yes
no
no
no
reconnect
change transformer of
indoor power supply
if there is 15VAC
at secondary side
of transformer of
indoor PCB
if indoor transformer
is connected to the
socket firmly
if the fuse of indoor
PCB is burnt off
if the primary side of
indoor transformer is
short circuit
change the transformer
change PCB