Pc 0F(Pfc Module Protection Diagnosis And Solution) - Mars Comfort-Aire Century VCD-SA Series Service Manual

7.15 PC 0F PFC module protection diagnosis and solution)
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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
Yes
Measure whether the voltage
between P and N is normal
refer to the Index？
No
Check whether
inductance of PFC module
is good? If the inductance is
good, the resistance of the
two ports is 0
Yes
Replace the PFC module
Connect it tightly, check
No
No
Yes Replace the outdoor main board
the
No Replace the inductance
Troubleshooting 39

normal or not
Trouble is solved

Service Manual - VCDxxSA
Yes