Carrier 38MBRC Series - PFC MODULE PROTECTION DIAGNOSIS; PC 0 F Troubleshooting

38MBRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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PC 0F(PFC Module Protection Diagnosis and Solution)
Description: When the voltage signal that the IPM sends to the compressor drive chip is abnormal, the LED displays the failure
code and the air conditioner turns off.
Recommended parts to prepare:
• Connection wires
• Inductance
• Outdoor main PCB
• PFC module
Troubleshooting and repair:
Test the resistance between every two ports of U, V, W of IPM and P, N. If any of the ports result is 0 or close to 0, the IPM is defective.
Otherwise, follow the procedure described on the following flowchart.
Check whether the
connecting line between
main board and the PFC
module is connected tightly
Yes
P
Measure whether the voltage
between P and N is normal
refer to the index
No
goo
d
,
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
No
,
Connect it tightly , check
normal or not
Replace the outdoor main boardYes
Yes
No
No
Replace the PFC module
Trouble is solved