Chigo CS-25V1A-H1; CS-35V1A-E2; CS-50V9A-S; CS-70V9A-T - 9, The malfunction code:P4 (compressor discharge temp is overhigh...)

The faulty cause：
1, the compressor crustal temp switch has been damaged
2, outdoor ambient temp go beyond the limited
3, compressor discharge temp is overhigh
4, module tem
p
g
o be
y
ond the limited
Annotation 1：The normal value of the phase current：18K＜11A;24K＜13A;28K＜15A
9, 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）
N
Check the connection position between motor and
outdoor PCB whether is loose ，
(Please insert and pull out the terminal over and
over, check whether the motor is normal)
N
The refrigerant is more than
usual. Please let it out.
The outdoor PCB is bad.
Please change it
Y
Whether the pressure
is normal? (the normal
value : the high is
2.4~3.06MPa. the low
is 1.2~1.6MPa
N
Check the
compressor phase
current whether it
is large. Please
change it if the
value is large.
Y
Turn off the power
Check whether the compressor crustal temp
switch is disconnected.
Y
Compressor crustal temp switch
has been damaged，then change
it。
N
Check whether the outdoor ambient temp is
overhigh or overlow.
Y
The fault will disappear when
the outdoor ambient temp is
beyond minus 20℃ and under
plus 55℃.
N
Please Charge the refrigerant.
N
Check whether the A/C units’ pressure is normal
（the normal value：high pressure 3.06Mpa low
pressure 1.6Mpa）when the A/C unit operate
Check whether the current is normal?
the normal current:18K＜ 13A. 24K,
＜15A. 28K＜17A
Change motherboard of outdoor
PCB if still can’t run after using that
method.
Y
N