9. Troubleshooting
9.1 Indoor unit error display
For MS9A-09HRN1-QB8, MS9A-09HRN1-QC2(2T0032300908), MS9A-11HRN1-QB8,
MS9A-16HRN1-QB8(A):
Display LED STATUS
E1 EEPROM error
E2 Zero crossing signal detection error
E3 Indoor fan speed has been out of control
E4 Over current protection of the compressor occurs 4 times
E5 Open circuit or short circuit of room temperature sensor
E6 Evaporator temperature sensor open circuit or short circuit
For 21k,24k models:
Display LED STATUS
E1 EEPROM error
E4 Over current protection of the compressor occurs 4 times
E5 Indoor room temperature sensor T1 open circuit or short circuit
E6 Evaporator coil temperature sensor T2 open circuit or short circuit
E7 Condenser coil temperature sensor T3 open circuit or short circuit
E9 Indoor / outdoor units communication error
For other models
Timer lamp Failure
☆ X Indoor fan speed has been out of control
☆ O The T1 or T2 sensor is open circuit or short circuit
X ☆
Over current protection occurs 4 times(for
MS9A-12HRN1-QC2 with BOM code 220032402100,it
doesn’t have this kind of protection)
O ☆ EEPROM error
☆ ☆ Zero crossing signal detection error
O（light） X（off） ☆（flash）
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