Midea MUBU-12HRFN1-M Service Manual page 64

For 36K-48K Outdoor Unit
No
1 Communication malfunction between indoor and outdoor units.
2 Protection of over-current
3 Open circuit or short circuit of outdoor ambient temperature sensor T4
4 Open circuit or short circuit of condenser coil temperature sensor T3
Open circuit or short circuit of Compressor discharge temperature
5
sensor T5
6 Outdoor unit EEPROM error
7 Outdoor fan speed has been out of control
8
IPM malfunction
9 Over voltage or over low voltage protection
10 High temperature protection of compressor top
11 Outdoor low temperature protection
12 Inverter compressor drive error
13 High temperature protection of indoor coil in heating
14 Outdoor temperature protection of outdoor coil in cooling
15 Discharge temperature protection
16 Protection of active PFC module
17 Communication error between control board and IPM board
18 Hi-pressure switch protection
19 Low-pressure switch protection
20
Outdoor IGBT temperature sensor error
21 AC voltage protection
Outdoor check function
N
00 Normal display
01 Indoor unit capacity demand code
02 Amendatory capacity demand code
The frequency after the capacity requirement
03
transfer
04 The frequency after the frequency limit
05 The frequency of sending to 341 chip
Indoor unit evaporator outlet temperature(heating
06
T2，cooling T2B)
Problems
Display
Display running frequency, running state or malfunction
code
Actual data*HP*10
If capacity demand code is higher than 99, the digital display
tube will show single digit and tens digit. (For example, the
digital display tube show "5.0",it means the capacity demand
is 15. the digital display tube show "60",it means the
capacity demand is 6.0)
If the temperature is lower than 0 degree, the digital display
tube will show "0".If the temperature is higher than 70
degree, the digital display tube will show "70".
61
Error Code
E1
F0
F1
F2
F3
F4
F5
P0
P1
P2
P3
P4
J0
J1
J2
J3
J4
J5
J6
P7
J8
Remark