Hisense AMS-07UR4SNVT4 Service Manual page 162

6. TROUBLE SHOOTING
Outdoor coil anti-overload
protection with cooling
IPM module protection
PFC protection
Compressor pre heating
process
Chip in outdoor board in
trouble
AC voltage higher or lower
protection
DC compressor start failure
 
★
  
  
 
★
 
★

★ ★
  
a.the refrigerant is too much;
b.the outdoor fan motor is failure;
c.the outdoor fan is broken;
d.the condensor is dirty;
e.the air inlet and air outlet of the
indoor unit and the outdoor unit is
not normally
a.The IPM board is failure;
b.The outdoor fan is broken;
c.The outdoor fan motor is failure;
d.The outdoor fan has been
blocked ;
e.The condenser is dirty;
f.The outdoor unit has been
installed without standard.
a.the PFC is failure;
b.the outdoor drive board is failure
it is normal mode in cold weather
a. Using the wrong drive board;
b. Using the wrong compressor.
a.the supply voltage is higher or
lower than normal;
b.the inner supply voltage of the
unit is higher or lower than normal
a.the outdoor drive board is failure;
b.the compressor is failure