Midea mcd-24hrdn1 - Page 209

Troubleshooting
Electrical Control System 199
For Normal 4-way cassette(24K-30K)
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 Indoor EEPROM malfunction ◎ X X X E7
7 Outdoor unit malfunction X X X ◎ Ed
X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
For Duct type(18-30K)
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 Indoor EEPROM malfunction X X ☆ X E7
7 Outdoor unit malfunction X X X ◎ Ed
X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)
For Normal 4-way cassette(36K-60K), ceiling & floor(36K-60K), Duct type(36K-60K), High pressure
static duct
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 Indoor 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 normal 4-way cassette & duct type.