Service Manual

Table Of Contents

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 E0 / F4 (EEPROM parameter error diagnosis and solution) ............................18

7.2 E1 (Indoor and outdoor unit communication error diagnosis and solution) ...19

7.3 E2 (Zero-crossing detection error diagnosis and solution) .............................21

7.4 E3 / F5 (Fan speed is operating outside of the normal range diagnosis and

solution) ......................................................................................................22

7.5 E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis

and solution) ...............................................................................................25

7.6 E7 (Indoor PCB / Display board communication error diagnosis and solution) 26

7.7 EC (Refrigerant Leakage Detection diagnosis and solution) ..........................27

Troubleshooting