Pioneer LISAS-B-1403, Service Manual

Page: 122 / 151

Troubleshooting
120 Electrical Control System
For 36K~48K Units
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 Indoor EEPROM malfunction
☆
X X X E7
6 Indoor fan speed is out of control
☆ ☆
X X E8
7 Refrigerant Leakage Detection
☆ ☆
O X EC
8 Outdoor unit malfunction X
◎
X X Ed
9 Full-water malfunction X
☆
X X EE
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
O (on) X(off)
☆
(flash at 5Hz)
◎
(flash at 0.5Hz)
F0,F1,F2 is only available for super-slim cassette
2.3 Outdoor unit malfunction
For YN012GMFI16RUD and YN018GMFI18RUD:
No. Problems Green Red IU display
1 standby for normal O X
2 Operation normally X O
3 IPM malfunction or IGBT over-strong current protection
☆
X P0
4 Over voltage or too low voltage protection O O P1
5 Inverter compressor drive error X
☆
P4
6 Inverter compressor drive error
☆
O P4
7
Communication malfunction between compressor driver board and
outdoor main board
☆ ☆
P4
8
Compressor driver board EEPROM malfunction
O
☆
E5
O （ light ） X （ off ） ☆（ 2.5Hz flash ）