Odu)Pc 0F(Pfc Module Protection Diagnosis And Solution) - MrCool DIY-MULTI2-18HP230C Service Manual

8.9

(ODU)PC 0F(PFC module protection diagnosis and solution)

Description: Outdoor PCB detects PFC signal is low voltage or DC voltage is lower than 340V for 6s when quick check.
Recommended parts to prepare:
• Connection wires
• Outdoor PCB
• Inductance
• PFC circuit or IPM module board
Troubleshooting and repair:
PFC module protection
PFC module protection
Check whether the
Check whether the
connecting line between
connecting line between
main board and the PFC
main board and the PFC
module is connected tightly
module is connected tightly
Measure whether the voltage
Measure whether the voltage
between P and N is normal
between P and N is normal
refer to the Appendix？
refer to the Appendix？
Check whether the
Check whether the
inductance of PFC module is
inductance of PFC module is
good? If the inductance is
good? If the inductance is
good, the resistance of the
good, the resistance of the
two ports is 0
two ports is 0
Replace the PFC module
Replace the PFC module
No
Yes
No
Yes
 Troubleshooting 41
Connect it tightly, check
Connect it tightly, check
normal or not
normal or not
No
Yes Replace the outdoor main board
Replace the outdoor main board
No Replace the inductance
Replace the inductance
Yes
Trouble is solved
Trouble is solved
