7
Texting method
1
）
Check input voltage of fan with testing tools (depending on the model: please refer to the manual
technical parameters). If there is voltage input, it can judge is fan failure; if no voltage input, it can
judge is circuit poor contact or fan short circuit.
2
）
The thermostat under refrigeration status
2.1
）
Check the working voltage output of output terminals of the compressor at the back of
thermostat with testing tools .If there is no voltage output, it can be judged as thermostat failure, if
there is voltage output, then continue next testing.
2.2
）
Check the working voltage output of output terminals of the solenoid valve at the back of
thermostat with testing tools .If there is voltage output, it can be judged as thermostat failure, if no
voltage output, then continue next testing.
3
）
Under refrigeration status, the compressor cannot start
3.1
）
Check the capacity of boost capacitor of compressor with testing tools, the standard capacity is
10%, if the figure below 10% can be judged the compressor’s capacitor lower standard requirements.
3.2) Check input voltage of compressor with testing tools (depending on the model: please refer to
the manual technical parameters), if voltage lower than compressor boost voltage, the compressor do
not work.
3.3
）
Check output voltage of output terminal of compressor overload protector with testing tools. If
there is no voltage output at output terminal, it can be judged as overload protector failure or circuit
damage.
