Hisense AUD-18UX4SGKL Service Manual page 68

7.TROUBLE SHOOTING
U phase current
9
fault
V phase current
10
fault
phase
11
failure
voltage absent
12
phase
the compressor
overload
13
protector
operate
the
pressure switch
operate or the
14
unit turn off for
high pressure
protection
the
pressure switch
protection
15
the unit turn off
for low pressure
protection
overload
16 protection
cooling mode
17 the discharge
2.The compressor
connect loose;
3.The AC contactor is fault;
4.The compressor is fault
1.Compressor U phase power cord
is fault or connect wrong;
2.Outdoor control board is fault;
3.The Compressor is fault
1.Compressor V phase power cord
is fault or connect wrong;
2.The outdoor control board is
fault;
3.The compressor is fault
1.Three-phase power is abnormal;
2.The outdoor
wrong
wrong;
3. The outdoor control board is
failure
1.Three-phase power is abnormal;
2.The outdoor
wrong;
3.The outdoor control board is
failure
1. The wiring of the overload
protector connect loose
2. The overload protector is failure
3. The refrigerant is not enough;
4. The installation pipe is too long
than normal, but not add the
enough refrigerant;
5. The expansion valve is failure;
6. The outdoor control board is
failure
1.The wiring of the high pressure
high protector connect loose;
2.The high pressure protector is
failure;
3.The outdoor control board is
abnormal;
4. Overload in cooling;
5. Overload in heating.
1. The low pressure switch is
failure;
low
2.The wiring of the low pressure
switch connect loose;
or
3.The refrigerant is not enough;
4.The expansion valve failure in
heating mode;
5.The outdoor control board is
abnormal.
in System overload
1.The wiring
power cord
wiring connect
wiring connect
of the discharge
wiring diagram;
3.Replace the AC contactor;
4.Replace the compressor.
1.Replace the U phase power cord or
reconnect the U phase power cord
refer to the wiring diagram;
2.Replace the outdoor control board;
3.Replace the compressor.
1.Replace the V phase power cord or
reconnect the V phase power cord
refer to the wiring diagram;
2.Replace the outdoor control board;
3.Replace the compressor.
1.Normally protection, please check
the supply power
2.Check the wiring connection refer
to the wiring diagram;
3.Replace the outdoor control board
1. Normally protection
2. Check the wiring connection refer
to the wiring diagram;
3. Replace the outdoor control board
1. Reconnect the
overload protector;
2. Replace the overload protector;
3. Check the welding point of the unit
to confirm whether it is leakage, and
then recharge the refrigerant;
4. Add the refrigerant;
5. Replace expansion valve;
6. Replace the outdoor control board.
;
1.Reconnect the wiring the high
pressure protector;
2. Replace the
protector;
3. Replace the outdoor control board;
4. Please refer to the Note 3;
5. Please refer to the Note 4.
1. Reconnect the wiring of the low
pressure switch;
2. Replace the low pressure switch;
3.Check the welding point to confirm
whether the unit is leakage, and then
add some refrigerant;
4. Replace the expansion valve;
5. Replace the outdoor control board.
Please refer to the Note 3.
1.Reconnect the
wiring of the
high pressure
wiring of the