Manualshelf

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
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Troubleshooting 26
Part requiring
replacement
Error Code
PC 40 EC 72 PC 43 PC 45 (O)PC 06 (O)PC 0A (O)PC 30
PC 03/
(O)PC 31
Outdoor PCB
x
Outdoor fan motor x x x x
T3 Sensor x x x x x x x
T4 Sensor x x x x x x x x
TP Sensor x x x x x x x
T2B Sensor x x x x x x x x
Reactor or inductance x x x x x x x x
Compressor x x x x x x x
IPM module board x x x x x x x
Bridge rectifier x x x x x x x x
PFC module x x x x x x x x
Additional refrigerant x x x x x
Electric control box x x x x x x x
High pressure switch x x x x x x x
Low pressure switch x x x x x x x
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.