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Troubleshooting Guide

ManualsBrandsMRCOOL ManualsDIY Mini SplitsDIY 42000 3.5 Ton 3-Zone Ductless Mini-Split AC and Heat Pump Condenser - 230-Volt/60Hz
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Troubleshooting 38
8.7 PC 01 / E5 (Over voltage or too low voltage protection) / PC 10 (Outdoor unit low AC
voltage protection) / PC 11 (Outdoor unit main control board DC bus high voltage
protection) / PC 12 (Outdoor unit main control board DC bus high voltage protection
/341 MCE error) Diagnosis and Solution
Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.
Recommended parts to prepare:
• Power supply wires
• IPM module board
• Outdoor PCB
• Bridge rectifier
• PFC circuit or reactor
Troubleshooting and repair: