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Troubleshooting
2. Troubleshooting
2.1 Display board
Display board of Ceiling-floor indoor unit
2.2 Indoor unit malfunction
NO.
Malfunction
Communication malfunction between indoor
1
and outdoor units.
Open or short circuit of T1 temperature
2
sensor
Open or short circuit of T2 temperature
3
sensor
Open or short circuit of T2B temperature
4
sensor
5
Indoor EEPROM malfunction
6
Indoor fan speed is out of control
7
Refrigerant Leakage Detection
8
Outdoor unit malfunction
9
Full-water malfunction
Communication malfunction between main
10
PCB and up-down panel PCB
11
Up-down panel malfunction
12
Up-down panel is not closed
Communication malfunction between master
13
unit and slave unit
14
Other malfunction of master unit or slave unit
46
Defrosting
lamp
X
X
X
X
☆
☆
☆
X
X
☆
☆
☆
X
X
X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
O (on)
F0,F1,F2 is only available for super-slim cassette
Alarm
Running lamp
lamp
X
X
☆
X
☆
X
☆
X
X
X
☆
X
☆
O
◎
X
☆
X
☆
☆
☆
X
☆
X
☆
X
☆
☆
Timer
Display(digital
lamp
tube)
☆
E1
X
E2
X
E3
X
E4
X
E7
X
E8
X
EC
X
Ed
X
EE
X
F0
☆
F1
O
F2
☆
F3
X
F4
Electrical Control System
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