Troubleshooting Guide

Contents
1. Safety Caution .......................................................................................................3
2. General Troubleshooting ......................................................................................4
3. Complain Record Form ..........................................................................................6
4. Information Inquiry ...............................................................................................8
5. Error Diagnosis and Troubleshooting Without Error Code ...............................11
5.1 Remote maintenance ...................................................................................11
5.2 Field maintenance .......................................................................................12
6. Quick Maintenance by Error Code ......................................................................17
7. Troubleshooting by Error Code ...........................................................................18
7.1 EH 00 / EC 51 (EEPROM parameter error diagnosis and solution) ...........18
7.2 EL 01 (Indoor and outdoor unit communication error diag. and solution).. 19
7.3 EH 02 (Zero-crossing detection error diagnosis and solution) . ................... 21
7.4 EH 03 / EC 07 (Fan speed is operating outside of the normal range
diagnosis and solution) .............................................................................. 22
7.5 EH 60/EH 61/EC 53/EC 52/EC 54/EC 56 (Open circuit or short circuit of
temperature sensor diagnosis and solution) ............................................... 25
7.6 EH 0b (Indoor PCB / Display board communication error diagnosis and
solution) ..................................................................................................... 26
7.7 EL 0C (Refrigerant Leakage Detection diagnosis and solution) ................ 27
Troubleshooting