Toyotomi CCT 140IUINV, Service Manual

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Troubleshooting
Electrical Control System 113
2.2 Indoor unit malfunction
For floor standing:
Codes
Contents
P0 Evaporator low temp. protection
Ed Outdoor unit malfunction
E1 Indoor / outdoor units communication error
E2 Open or short circuit of T1 temperature sensor
E3 Open or short circuit of T2 temperature sensor
E4 Open or short circuit of T2B temperature sensor
E7 EEPROM chip malfunction
E8 Indoor fan speed is out of control
For the others tyoes:
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 Refrigerant Leakage Detection ☆ ☆ O X EC
8 Outdoor unit malfunction X
◎
X X Ed
9 Indoor fan speed is out of control
☆ ☆
X X E8
10
Communication malfunction between main
PCB and up-down panel PCB
☆ ☆ ☆ X F0
11 Up-down panel malfunction
☆ ☆
X
☆
F1
12 Up-down panel is not closed ☆ ☆ X O F2
13
Communication malfunction between master
unit and slave unit
X
☆
X
☆
F3
14
Other malfunction of master unit or slave unit X
☆ ☆
X F4
O (on) X(off)
☆
(flash at 5Hz)
◎
(flash at 0.5Hz)
Notes: Digital display is only available for super-slim 4-way cassette & duct type.
F0,F1,F2 are
only available for super-slim 4-way cassette