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Troubleshooting Guide

ManualsBrandsMRCOOL ManualsDIY Mini SplitsDIY 36000BTU 3-Ton 4-Zone Ductless MiniSplit A/C&Heat Pump 230V/60 Hz W/1 ft./16 ft., 25 ft., 35 ft., 75 ft. Line Set
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Contents
1. Safety Caution .......................................................................................................3
2. General Troubleshooting ......................................................................................4
2.1 Error Display (Indoor Unit) ..............................................................................4
2.2 Error Display (Outdoor Unit) ...........................................................................6
3. Complain Record Form ..........................................................................................7
4. Information Inquiry ...............................................................................................9
5. Outdoor Unit Point Check Function ...................................................................12
6. Error Diagnosis and Troubleshooting Without Error Code ...............................18
6.1 Remote maintenance ...................................................................................18
6.2 Field maintenance .......................................................................................19
7. Quick Maintenance by Error Code ......................................................................24
8. Troubleshooting by Error Code ...........................................................................27
8.1 EH 00 /EC 51(EEPROM parameter error diagnosis and solution) ................27
8.2 EL 01 (Indoor and outdoor units communication error diag. and solution).... 28
8.3 EH 03 / EC 07 (Fan speed is operating outside of the normal range)/
EC 71 (Overcurrent Failure of Outdoor DC Fan Motor) Diag. and Solution ...31
8.4 EH 60/EH 61/EC 53/EC 52/EC 54/EC 56 /(ODU)E4/EC 50 (Open circuit or
short circuit of temperature sensor diagnosis and solution) ............................33
8.5 PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection)/
PC 46(Compressor speed has been out of control)/PC 49(Compressor
overcurrent failure) diagnosis and solution .....................................................34
8.6 PC 00 (IPM malfunction) & (IDU) PC 04 (Inverter compressor drive error
diagnosis and solution)
...................................................................................
36
Troubleshooting