Troubleshooting Guide

ManualsBrandsMRCOOL ManualsDIY Mini SplitsDIY 39,000 BTU 3 Ton 4-Zone Ductless Mini-Split A/C & Heat Pump 230-Volt/60Hz/1-16 ft., 25 ft., 50 ft., 66 ft. Line Sets

Troubleshooting 47

8.14 (IDU) PC 03 / (ODU) PC 30 (High pressure protection diagnosis and solution)

Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa

Recommended parts to prepare:

• Connection wires

• Pressure switch

• Outdoor fan

• Outdoor main PCB

Troubleshooting and repair: