koppel KV 24CC-ARF21 - Page 114

Troubleshooting
2.2 Indoor unit malfunction
NO. Malfunction
Running
lamp
Timer
lamp
Defrosting
lamp
Alarm
lamp
Display(nixie
tube)
1
Communication malfunction between indoor
and outdoor units.
X ☆ X X E1
2
Open or short circuit of T1 temperature
sensor
☆ X X X E2
3
Open or short circuit of T2 temperature
sensor
☆ X X X E3
4
Open or short circuit of T2B temperature
sensor
☆ X X X E4
5 Full-water malfunction X X X ☆ EE
6 EEPROM malfunction X X ☆ X E7
7 Outdoor unit malfunction X X X ◎ Ed
☆X(off) (flash at 5Hz) ◎(flash at 0.5Hz)
Note: Digital display is only available for 4-way cassette
。
For Cassette and Ceiling Floor models
NO. Malfunction
Defrosting
lamp

Alarm
lamp

Running lamp
Timer
lamp

Display(digital
tube)

1
Communication malfunction between indoor
and outdoor units.

X X X
☆
E1
2
Open or short circuit of T1 temperature
sensor

X X ☆ X E2
3
Open or short circuit of T2 temperature
sensor

X X ☆ X E3
4
Open or short circuit of T2B temperature
sensor

X X ☆ X E4
5 Full-water malfunction X ☆ X X EE
6 Indoor EEPROM malfunction ☆ X X X E7
7 Outdoor unit malfunction X ◎ X X Ed
8 Indoor fan speed is out of control ☆ ☆ X X E8
9
Communication malfunction between main
PCB and up-down panel PCB

☆ ☆ ☆ X F0
10 Up-down panel malfunction ☆ ☆ X ☆ F1
11 Up-down panel is not closed
☆ ☆
X O F2
12
Communication malfunction between master
unit and slave unit

X ☆ X ☆ F3
13 Other malfunction of master unit or slave unit X ☆ ☆ X F4
O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
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