Troubleshooting
Page 76
8.15 PC 0F(PFC module protection diagnosis and solution)
Description: When the voltage signal that IPM send to compressor drive chip is abnormal, the LED displays the failure
code and the AC turns off.
Recommended parts to prepare:
• Connection wires
• Inductance
• Outdoor main PCB
• PFC module
Troubleshooting and repair:
At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0,
the IPM is defective. Otherwise, please follow the procedure below:
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Yes
Measure whether the voltage
between P and N is normal
refer to the Index？
Measure whether the voltage
between
P and N is normal
refer to the Index？
No
Check whether the
inductance of PFC module is
good? If the inductance is
good, the resistance of the
two ports is 0
Check whether the
inductance of PFC module is
good? If the inductance is
good, the resistance of the
two ports is 0
Yes
Replace the inductance
Replace the inductanceNo
Connect it tightly, check
normal or not
Connect it tightly
,
check
normal or not
Replace the outdoor main board
Replace the outdoor main board
Yes
Yes
No
No
Replace the PFC module
Replace the PFC module
Trouble is solved
Trouble is solved
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