Haier AB242ACBEA Service Manual page 95

4) The wire control organ displays the alarm signal with "E2"
    "E2" means indoor piping temperature sensor is abnormal   
Notation: The resistance of piping temperature sensor is 10K
8) The wire control organ displays the alarm signal with "E8"
    "E8" means malfunction of communication between control panel and indoor units
if the four ports on wire control
connected corresponding
with the port on PCB of indoor unit
 
begining
the alarm signal of wire
control organ is E2
if the position of piping
Temp.sensor is right
Y
if the resistance of
the sensor is right
N
replacing the sensor
begining
if the wire control organ can
matches the PCB of indoor units
Y
Y
if the ports:A,B,C and
D are connected well
Y
if the potrs A and B,or
C and D are short
N
amend the position
of sensor
Figure 7-6
N
replacing the wire
control organ
N
connect the
wire correctly
connect the
N
wire correctly
connect the
N
wire correctly
Figure 7-7
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