Chigo CS-25V1A-H1; CS-35V1A-E2; CS-50V9A-S; CS-70V9A-T - 10, The malfunction code: P7 (The outdoor unit DC generatrix voltage is abnormal)

10，The malfunction code:
P7 （The outdoor unit DC generatrix voltage is abnormal）
Y
1、check whether module temp sensor’resistance is
normal (the normal value range:1～40KΩ)；
2、 check whether the module and radiator are firm；
3、 check whether the disperse heat silica gel is short
or dry；
4、 check whether the module has been damaged.
N
1、Change the temp sensor；
2 、 Firm the module and
radiator；
3、Append anew the disperse
heat silica gel；
4、Change the module。
Y
Please change the outdoor PCB
Turn off the supply
Check whether the power voltage is in the
normal voltage range “150V～270V”。
N
Ensure the power voltage is in the
normal voltage range“150V～270V”
Y
The IPM basic board hardware has been damaged，
please change the IPM basic board。
The faulty cause：
1, The power voltage is
abnormal
2, The IPM basic board
hardware has been damaged