Hisense AMS-07UR4SNVT4 Service Manual page 125

6. TROUBLE SHOOTING
Current overload
8
protection
communication in trouble
between two chips
10
(control and driver) on
outdoor PCB.
Outdoor EEPROM in
11
trouble
Protection for the lower
12 outdoor ambient
temperature.
Compressor exhaust
13 temperature too high
protection
Outdoor ambient
14 temperature sensor in
trouble
Compressor shell
15 temperature too high
protection
Anti-freeze protection
with cooling or overload
16
protection with heating in
indoor unit
17 PFC protection
DC compressor start
18
failure
g.the power board is failure;
h.the outdoor control board is failure.
a.the fan motor run abnormally;
b.the condensor and evaporator is dirty;
c.the air inlet and outlet is abnormally;
d.Out control board is failure;
e.Compressor is failure
a. the connection wires connect loose
b.the outdoor board or drive board is failure;
a.the EEPROM chip is loose;
b.the EEPROM chip inserted with opposite direction;
c.the EEPROM chip is failure
a.It is normally protection for the unit when the outdoor
ambient temperature is lower than minus 15 degrees;
b.The outdoor ambient
temperature sensor is failure;
c.The outdoor control board is
failure.
a.the compressor exhaust temperature sensor is failure;
b.the refrigerant of the unit is not enough
a.the outdoor ambient
temperature sensor connect loose;
b.the outdoor ambient temperature sensor is failure;
c.the outdoor control board is failure
a.the compressor exhaust temperature sensor connect
loose
b.the refrigerant of the unit is not enough
a.it is normal protection;
b.the indoor coil temperature sensor connect loose;
c.the indoor coil temperature sensor is failure;
d.the indoor control board is failure；
e. the refrigerant system is abnormal
a.the PFC is failure;
b.the outdoor drive board is failure
a.the compressor power cord connect loose or incorrect;
b.the outdoor drive board(IPM) is failure;
c. the outdoor control board is failure
d.the compressor is failure