Midea MOBA30U-12HN1-Q Service Manual page 245

2.2. Self-diagnosis
Indoor unit's LED indication
During malfunction or protection, the indicators and digital LED displays as follow:
For A5 Duct, HSPD, Ceiling &floor type:
No Malfunction or protection
1 T1 temperature sensor open or short circuit
2 T2 temperature sensor open or short circuit
3 T3 temperature sensor open or short circuit
4 Indoor EEPROM malfunction
For Super-slim 4-way Cassette Type:
NO. Malfunction
1 T1 temperature sensor open or short circuit
2 T2 temperature sensor open or short circuit
3 T3 temperature sensor open or short circuit
4 Indoor EEPROM malfunction
5 Water level alarm
Communication error between auto-lifting
6
panel and slim cassette
Auto-lifting panel is faulty (for slim cassettes
7
with an auto-lifting panel)
Auto-lifting panel is not closed (for slim
8
cassettes with an auto-lifting panel)
For Compact cassette Type:
NO.
1 T1 temperature sensor open or short circuit
2 T2 temperature sensor open or short circuit
3 T3 temperature sensor open or short circuit
4 Indoor EEPROM malfunction
5 Water level alarm
For A6 Duct:
Indoor EEPROM malfunction
T1 temperature sensor open or short circuit
T2 temperature sensor open or short circuit
Refrigerant leakage detection
Water level alarm malfunction
T3 temperature sensor open or short circuit
Dual chips communication malfunction
Electrical Control
O (on)
Note: Digital display is available for duct type.
O (on)
Malfunction
O (on)
Malfunction
O (on)
Operation Timer
☆
X
☆
X
X X
☆ ☆
X(off) ☆(flash at 5Hz)
Running Timer
lamp lamp
☆
X
☆
X
X X
☆ ☆
X X
☆
X
☆
X
X O
X(off) ☆(flash at 5Hz)
Running
lamp
X
☆
X
☆
X
X(off) ☆(flash at 5Hz)
Error Code
E0
E4
E5
EC
EE
F2
FA
X(off)
Def/Fan Alarm Digital LED Display
X X
X X
☆
X
X X
Defrosting Alarm
lamp lamp
X X
X X
☆
X
X X
☆
X
☆ ☆
☆ ☆
☆ ☆
Timer Defrosting
lamp lamp
☆
X
X X
☆
X
☆
X
X X
Operation Lamp
Timer Lamp
X
X
X
X
X
O
O
Troubleshooting
E2
E3
E4
E7
Display(digital
tube)
E2
E3
E4
E7
E8
F0
F1
F2
Alarm
lamp
X
X
X
X
☆
(flashes)
1
5
6
7
8
3
11
241