Roland FAVORITE ON-OFF Series Service Manual page 60

Troubleshoo�ng
1. Safety Cau�on .......................................................................................... 58
2. General Troubleshoo�ng ................................................................................. 59
3. Error Diagnosis and Troubleshoo�ng Without Error Code ......................... 60
3.1 Remote maintenance ....................................................................................... 60
3.2 Field maintenance ............................................................................................ 61
4. Quick Maintenance by Error Code ................................................................... 66
5. Troubleshoo�ng by Error Code ................................................................. 67
5.1 Common Check Procedures ............................................................................. 67
5.2 E0(EEPROM parameter error) .......................................................................... 68
5.3 E1(Indoor and outdoor unit communica�on error) (only for 22k models) ... 69
5.4 E2 (Zero crossing detec�on error diagnosis and solu�on).............................. 70
5.5 E3 (Fan speed has been out of control diagnosis and solu�on) ..................... 71
5.6 E4/E5/F2 (Open circuit or short circuit of temperature sensor diagnosis and
solu�on) (F2 is only for
5.7 E7 (Indoor PCB /Display board communica�on error) .................................... 74
5.8 EC (Refrigerant Leakage Detec�on diagnosis and solu�on) ........................... 75
Contents
22k models) .................................................................. 73
Page 57