Pc0F Pfc Module Protection - Carrier 38MBRC Series Service Manual

38MBRC: Service Manual
PC 0F PFC Module Protection Diagnosis and Solution)
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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
Measure whether the voltage
between P and N is normal
P
refer to the index
Check whether the
inductance of PFC module is
good. If the inductance is
good
good, the resistance of the
,
two ports is 0
two ports is 0
Replace the PFC module
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
No
No
Yes
No
No
Yes
Connect it tightly , check
,
normal or not
Replace the outdoor main board
Replace the inductance
30
Yes
Trouble is solved