37
9.1 Indoor Unit Error Display
Operation
lamp
Timer lamp Display LED STATUS
☆
1 time
X
E0
Indoor unit EEPROM parameter error
☆
2 times
X
E1
Indoor / outdoor units communication error
☆
3 times
X
E2
Zero-crossing signal detection error
☆
4 times
X
E3
Indoor fan speed has been out of control
☆
5 times
X
E4
Indoor room temperature sensor T1 open circuit or short
circuit
☆
6 times
X
E5
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆
7 times
X
EC
Refrigerant leakage detection
☆
2 times
O
F1
Outdoor ambient temperature sensor T4 open circuit or
short circuit
☆
3 times
O
F2
Condenser coil temperature sensor T3 open circuit or
short circuit
☆
4 times
O
F3
Compressor discharge temperature sensor T5 open
circuit or short circuit
☆
5 times
O
F4
Outdoor unit EEPROM parameter error
☆
6 times
O
F5
Outdoor fan speed has been out of control
☆
1 times
☆
P0
IPM malfunction or IGBT over-strong current protection
☆
2 times
☆
P1
Over voltage or over low voltage protection
☆
3 times
☆
P2
High temperature protection of compressor top
diagnosis and solution(only for 9k,12k models)
☆
5 times
☆
P4
Inverter compressor drive error
O
（
light
）
X
（
off
）
☆（
flash
）
Summary of Contents for MROHC09AS
Page 14: ...12 5 Wiring Diagram 5 1 Indoor Unit MWOHC09S MWOHC12S MWOHC18S ...
Page 15: ...13 MWOHC24S ...
Page 16: ...14 5 2 Outdoor Unit MROHC09AS MROHC12AS ...
Page 17: ...15 MROHC18AS ...
Page 18: ...16 MROHC24AS MROHC09AS MROHC12AS ...
Page 19: ...17 MROHC18AS ...
Page 29: ...27 T2 7 C 44 6 F the compressor frequency will not be limited ...
Page 53: ...51 Take the 9k model as example P V P U ...
Page 54: ...52 N U P W ...
Page 55: ...53 N W N V ...
