Service manual
23
10
Troubleshooting
10.1
Indoor Unit Error Display
Defrosting
Timer
Auto
Operation
LED status
X
X
O
☆
Module protection
O
X
X
☆
Compressor top protection against temperature
X
O
X
☆
Open or short circuit of outdoor temperature sensor
X
O
O
☆
Over load or too low voltage protection
O
O
O
☆
Open or short circuit of indoor temperature sensor
O
O
☆
☆
Fan speed out of control
☆
X
O
☆
Zero-crossing examination error
X
X
☆
☆
EEPROM data error
☆
☆
☆
☆
Indoor/outdoor communication protection
O
X
O
☆
Low temperature protection of outdoor ambient
O （bright） X （ extinguished） ☆ （flash）
10.2
Outdoor Unit Error Display
There is a LED(red) on outdoor main control board. The LED is on when the unit is running. The
LED flashes at a frequency of 0.5Hz if the unit is standby. The LED flashes at a frequency of 5Hz if
there is any malfunction.
