Toyotomi CCT 100HINVi, Service Manual

Page: 42 / 76

Troubleshooting
Electrical Control System 105
2.1.5 Icon explanation on indoor display board (Compact cassette).
2.2 Indoor unit malfunction
NO. Malfunction
Defrosting
lamp
Alarm
lamp
Running lamp
Timer
lamp
Display(digital
tube)
1
Communication malfunction between indoor
and outdoor units.
X X X
ƿ
E1
2
Open or short circuit of T1 temperature
sensor
X X ƿ X E2
3
Open or short circuit of T2 temperature
sensor
X X
ƿ
X E3
4
Open or short circuit of T2B temperature
sensor
X X ƿ X E4
5 Full-water malfunction X
ƿ
X X EE
6 Indoor EEPROM malfunction ƿ X X X E7
7 Outdoor unit malfunction X Ƽ X X Ed
8 Indoor fan speed is out of control ƿ ƿ X X E8
9
Communication malfunction between main
PCB and up-down panel PCB
ƿ ƿ ƿ X F0
10 Up-down panel malfunction
ƿ ƿ
X
ƿ
F1
11 Up-down panel is not closed ƿ ƿ X O F2
12
Communication malfunction between master
unit and slave unit
X
ƿ
X
ƿ
F3
13 Other malfunction of master unit or slave unit X ƿ ƿ X F4
O (on) X(off)
ƿ
(flash at 5Hz)
Ƽ
(flash at 0.5Hz)