13. Troubleshooting
52 SS-SVM001A-EM
13.2 Fault codes
The following is the fault code table of outdoor units.
Table 1 Outdoor fault code
Fault
code
Fault description Possible reasons for abnormality How to deal with Remarks
1
Outdoor ambient
temperature
sensor
fault
1. The outdoor ambient temperature
sensor is connected loosely;
2. The outdoor ambient temperature
sensor fails to work;
3. The sampling circuit fails.
1. Reconnect the outdoor
ambient temperature sensor;
2. Replace the outdoor ambient
temperature sensor
components;
3. Replace the outdoor control
board components.
2
Outdoor coil
temperature
sensor
fault
1. The outdoor coil temperature
sensor is connected loosely;
2. The outdoor coil temperature
sensor fails to work;
3. The sampling circuit fails.
1. Reconnect the outdoor coil
temperature sensor;
2. Replace the outdoor coil
temperature sensor
components;
3. Replace the outdoor control
board components.
3
The unit over-cur-
rent
turn off fault
1. Control board current sampling
circuit fails;
2. The current is over high because
the supply voltage is too low;
3. The compressor is blocked;
4. Overload in cooling mode.
1. Replace the electrical control
board components;
2. Normal protection;
3. Replace the compressor;
4. Please see Table 2.
4 EEprom Data error
1. EE components fails;
2. EE components control circuit
fails;
3. EE components are inserted
incorrectly.
1. Replace the EE components;
2. Replace the outdoor control
board components;
3.Reassemble the EE
components.
5
Cooling freezing
protection (the
indoor coil
temperature is too
low)
1. The indoor unit can not blow air
normally;
2. The room temperature is too low
in cooling mode or the room
temperature is too high in heating;
3. The filter is dirty;
4. The duct resistance is too high to
resulting in low air flow;
5. The setting fan speed is too low;
6. The indoor unit is not installed in
accordance with the installation
standards, and the air inlet is too
close to the air outlet .
1. Check whether the indoor fan,
indoor fan motor and evaporator
work normally;
2. Normal protection;
3. Clean the filter;
4. Check the volume control valve,
duct length etc.;
5. Set the speed with high speed;
6. Reinstall the indoor unit
referring to the user manual to
change the distance between the
indoor unit and the wall or ceiling.
7
The communica-
tion fault between
the
indoor unit and
outdoor unit
1. The connection cable is connected
improperly between the indoor unit
and outdoor unit;
2. The communication cable is
connected loosely;
3. The communication cable fails;
4. The indoor control board fails;
5. The outdoor control board fails;
6. Communication circuit fuse open;
7. The specification of communication
cable is incorrect.
1. Reconnect the connection cable
referring to the wiring diagram;
2. Reconnect the communication cable;
3. Replace the communication cable;
4. Replace the indoor control board;
5. Replace the outdoor control board;
6. Check the communication circuit,
adjust the DIP switch and the short-
circuit fuse;
7. Choose suitable communication
cable referring to the user manual.
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