MrCool DIY-MULTI4-36HP230C User Manual

 Troubleshooting 41 
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
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 Appendix？
Measure whether the voltage
between P and N is normal
refer to the Appendix？
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

MrCool DIY-MULTI4-36HP230C Specifications

General

Brand	MrCool
Model	DIY-MULTI4-36HP230C
Category	Air Conditioner
Language	English

Summary

Safety Precautions

Precautions

General safety guidelines and measures to prevent personal injury or unit damage.

Information servicing(For flammable materials)

Safety checks and procedures for working with flammable refrigerants.

Specifications

Indoor units combination

Electrical Wiring Diagrams

Wiring diagrams and component abbreviations for outdoor units.

Outdoor Unit Disassembly

Outdoor Unit Disassembly

Step-by-step guides for disassembling specific parts of the outdoor unit.

Troubleshooting

Safety Caution

Crucial safety warnings before performing any troubleshooting or maintenance.

General Troubleshooting

Common error codes for indoor and outdoor units and their basic solutions.

Error Diagnosis and Troubleshooting Without Error Code

Quick Maintenance by Error Code

A table mapping error codes to likely faulty components for rapid replacement.

Troubleshooting by Error Code

Detailed troubleshooting steps and solutions for specific error codes (EH, EC, PC, etc.).

Check Procedures

Temperature Sensor Check

Compressor Check