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The malfunction code：P8 （lack the refrigerant or reverse valve fault）
Check whether the high and low pressure
valve are open
Check whether the system pressure is normal
（the normal value：high pressure3.06Mpa low
pressure1.6Mpa）
Pls change it if the sensor wire is short circuit
or open circuit.
Check whether the indoor and outdoor pipe
temp sensor are loose or hang in the air.
Turn off the power
Y
正常
Y
N
The faulty cause
1、 the high and low pressure valve are closed
2、 the refrigerant leaks from the A/C system
3、 the indoor and outdoor pipe temp sensor are
loose or hang in the air.
4、 the indoor and outdoor pipe temp sensor has
been damaged.
N
Open
pressure valve
Due to refrigerant leakage ，
N
kook for the leak to weld it， then
charge anew the refrigerant to
the system.Fig.9～17
Y
55
the
high
and
low
Pls arrange the indoor and
outdoor sensor correctly and
change it if the probe spring
piece is damaged.
Refer to Fig.18～25
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