York Pyrenees YM9FXC030BAA FX Series - 8 Troubleshooting; Indoor Unit Error Display

8. Troubleshooting
8.1 Indoor Unit Error Display
Operation lamp
Timer lamp
Display
LED STATUS
☆ 1 time
X
E1
EEPROM parameter error
☆ 2 times
X
E2
Zero-crossing signal detection error
☆ 3 times
X
E3
Indoor fan speed has been out of control
☆ 5 times
X
E5
Indoor room temperature sensor T1 open circuit or
short circuit
☆ 6 times
X
E6
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆ 7 times
X
E7
Condenser coil temperature sensor T3 open circuit or
short circuit
☆ 2 times
O
EC
Refrigerant Leakage Detection
☆ 9 times
X
E9
Indoor / outdoor units communication error
O（light） X（off） ☆（flash）