Hisense AMS-07UR4SNVT4 Service Manual page 160

6. TROUBLE SHOOTING
1.Indication on the outdoor unit:
When the unit has the following trouble and the compressor stops running, The LED of outdoor
control board will show the error sequence automatically:
NOTE:
★：LIGHT
Error Outdoor Failure
code Description
Normal
Outdoor coil temperature
sensor in trouble
Compressor exhaust
temperature sensor in trouble
Communication failure
between the indoor unit and
outdoor unit
Current overload protection
Maximum current protection
：FLASH ：OFF
LED1 LED2 LED3
  

★ ★
 
★
  
 
★

★ ★
the root cause my be one of the
following
a.the outdoor coil sensor connect
loose;
b.the outdoor coil temperature
sensor is failure;
c.the outdoor control board is
failure
a.the compressor exhaust
temperature sensor connect loose;
b.the compressor exhaust
temperature sensor is failure;
c.the outdoor control board is
failure
a.the communication cable connect
loose;
b.the communication cable is
failure;
c.the connection between the filter
board and the outdoor control
board is incorrect or loose;
d.the connection between the filter
board and the terminal is incorrect
or loose;
e.the indoor control board is
failure;
f.the PFC board is 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
a.the outdoor control board is short
circuit;
b.the drive board is short circuit;
c.the other components is short
circuit