Service manual
DM16-01.01.11-01en
34
Multi DC inverter R410A. Outdoor unit
11. Troubleshooting
11.1
Indoor unit error code explanation:
For MTBI-18HWDN1-Q
MALFUNCTION
RUN
Timer
DEF
Alarm
DISPLAY
DIGITAL
TUBE
Open or short circuit of T1 temperature sensor
☆
X X X E0
Open or short circuit of T2 temperature sensor
X
X
☆
X
E1
Indoor / outdoor units communication error
X
☆
X X E2
Full-water malfunction
X
X
X
☆
E3
Indoor EEPROM malfunction
☆
☆
X X E4
IPM module protection
☆
X
X
O
E5
Open or short circuit of T3 or T4 temperature sensor or
Outdoor EEPROM malfunction
☆
O
X X E6
Outdoor fan speed has been out of control
☆
O
☆
X
E7
Indoor fan speed has been out of control
☆
O
O X F5
Voltage protection
☆
O
X
O
P0
Outdoor unit over-current protection
☆
☆
☆
X P2
Inverter compressor drive protection
☆
◎
X
X
P4
Mode conflict
☆
X O
O
P5
O (on) X(off)
☆
(flash at 2Hz)
◎
(flash at 0.5Hz)
For other type
Malfunction
Error Code
Timer Lamp
Operation Lamp
(flashes)
Indoor EEPROM malfunction
E0
X
1
Communication malfunction between indoor and outdoor units
E1
X
2
Indoor fan speed has been out of control
E3
X
4
Open or short circuit of T1 temperature sensor
E4
X
5
Open or short circuit of T2 temperature sensor
E5
X
6
Water level alarm
EE X
8
Overcurrent protection (For some units)
F0
O
1
Open or short circuit of T4 temperature sensor
F1
O
2
Open or short circuit of T3 temperature sensor
F2
O
3
Open or short circuit of T5 temperature sensor
F3
O
4
Outdoor EEPROM malfunction (For some units)
F4
O
5
Outdoor fan speed is out of control
F5
O
6
Open or short circuit of T2B temperature sensor (For free-match indoor
units)
F6
O
7
Communication error between auto-lifting panel and slim cassette (For
slim cassette with auto-lifting panel)
F7 O
8
Auto-lifting panel is faulty (For slim cassette with auto-lifting panel)
F8
O
9
Auto-lifting panel is not closed (For slim cassette with auto-lifting panel)
F9
O
10
IPM module malfunction
P0
☆
1