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Annotation 1：The normal value of the phase current：
The malfunction code:P4 （compressor discharge temp is overhigh、outdoor ambient temp go beyond the limited、compressor
crustal temp switch is disconnected、module temp go beyond the limited）
Check whether the compressor crustal temp
switch is disconnected.
Check whether the outdoor ambient temp is
overhigh or overlow.
Check whether the A/C units' pressure is normal（the
normal value ： high pressure 3.06Mpa
1.6Mpa）when the A/C unit operate
2、
check whether module temp sensor'resistance is
normal (the normal value range:1～40KΩ)；
3、
check whether the module and radiator are firm；
4、
check whether the disperse heat silica gel is
short or dry；
5、
check whether the module has been damaged.
The malfunction code: P7 （The outdoor unit DC generatrix voltage is abnormal）
Check whether the power voltage is in the
normal voltage range "150V～270V"。
The IPM basic board hardware has been
damaged，pls change the IPM basic board。
Turn off the power
N
N
low pressure
Y
Y
Please change the outdoor PCB
Turn off the supply
Y
18K＜11A;24K＜13A;28K＜15A
The faulty cause ：
2 、
the compressor crustal temp switch has been
damaged
3 、
、outdoor ambient temp go beyond the limited
4 、
compressor discharge temp is overhigh
5 、
module temp go beyond the limited
Y
Y
N
1、Change the temp sensor；
N
2、Firm the module and radiator；
3 、 Append anew the disperse heat
4、Change the module。
The faulty cause ：
1 、 The power voltage is abnormal
2、 The IPM basic board hardware
has been damaged
N
54
Compressor crustal temp switch has
been damaged，then change it。
The fault will disappear when the outdoor
ambient temp is beyond minus 20℃ and
under plus 55℃.
Pls Charge the refrigerant.
silica gel；
Ensure the power voltage is in the
normal voltage range"150V～270V"
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