innovair ICS0736C21 Service Manual page 76

Troubleshooting
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 Water-level alarm malfunction
6 EEPROM malfunction
7 Outdoor unit malfunction
72
Running
lamp
X(off) at 5Hz) ◎ (flash at 0.5Hz)
☆(flash
Note: Digital display is only available for 4-way cassette。
Timer Defrosting
lamp
X
☆
X
☆
X
☆
X
☆
X X
X X
X X
Alarm Display(nixie
lamp lamp
X X
X X
X X
X X
X
☆
X
☆
X
◎
Electrical Control System
tube)
E1
E2
E3
E4
EE
E7
Ed