Hisense AMS-07UR4SNVT4 Service Manual page 122

6. TROUBLE SHOOTING
Communication trouble
between outdoor unit and
driver
Outdoor EEPROM in trouble
Compressor exhaust
temperature too high
protection
Outdoor ambient temperature
sensor in trouble
Compressor shell temperature
too high protection
Anti-freeze protection with
cooling or overload protection
with heating in indoor unit
Compressor drive in trouble
Outdoor fan motor locked rotor
protection

★ ★
★ ★ ★
 
★

★ ★
 
★
  
  
 
★
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.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.the indoor coil temperature
sensor connect loose;
b.the indoor coil temperature
sensor is failure;
c.the indoor control board is failure
d. the refrigerant system is
abnormal.
a.the outdoor drive board is failure;
b.the compressor is failure
c. the outdoor control board is
failure
a.the connection of the outdoor fan
motor is loose;
b.there are something block the
outdoor fan;
c.the fan motor is failure;
d.the outdoor control board is
failure