Haier AD28NAMBEA - Wired Controller Alarm E2: Piping Temperature Sensor Abnormal; Wired Controller Alarm E8: Communication Malfunction

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