Haier AD96NAHAEA - Page 61

Commercial Air Conditioner Model: AU96NATAEA
AD96NAHAEA, AP96NACAEA
61
bad heating
if set tem p. is proper
change the set temp.
refrigerant flow
malfunction
4-way valve failure
change 4-way valve
lack of refrigerant
solenoid valve failure
change the solenoid valve
change compressor
compressor failure
if fan is set as low speed
bad ventilation
set the fan as med speed
if the heating load too large
check the evaluation of
heating load
recharge refrigerant
if air inlet filter is blocked clean the filter
outdoor defrosting temp.
sensor is damaged,which
results in the outdoor untrue
defrosting
change outdoor defrosting
temp. sensor
if refrigerant pipe between I.D
and O.D is insulated
insulate the thick pipe and
the slim pipe respectively
4-way valve failure
change 4-way valve
blow out
cold air
anti cold air invalid
indoor coil temp. sensor
failure
change the sensor
Figure 2
10.1.3 Unit operation
a. Indoor fan not running