Carrier 38QUA009DS, Service Manual, Page: 91 / 116

88
16.2 Outdoor unit error display
For 18K-24K outdoor unit:
No. Problems
LED2
(Green)
LED1
(Red)
IU display
1 standby for normal O X
2 Operation normally X O
3 Compressor drive board EEPROM error O
☆
E5
4 IPM malfunction or IGBT over-strong current protection
☆
X P0
5 Over voltage or too low voltage protection O O P1
6 Inverter compressor drive error X
☆
P4
7 Inverter compressor drive error
☆
O P4
8
Communication malfunction between main control board
and driver board
☆ ☆
P4
For 36K-60K Outdoor Unit
No Problems Error Code
1 Communication malfunction between indoor and outdoor units E1
2 Current overload protection F0
3 Outdoor ambient temperature sensor (T4 ) malfunction F1
4 Condenser coil temperature sensor (T3) malfunction F2
5 Compressor discharge temperature sensor (T5) malfunction F3
6 Outdoor unit EEPROM parameter error F4
7 Outdoor fan speed malfunction F5
8 Inverter module (IPM) malfunction P0
9 Over-voltage or under-voltage protection P1
10
Compressor top high temperature protection (OLP) P2
11 Low ambient temperature cut off in heating P3
12 Compressor drive malfunction P4
13 High temperature protection of indoor coil in heating J0
14 Outdoor temperature protection of outdoor coil in cooling J1
15 Temperature protection of compressor discharge J2
16 PFC module protection J3
17 Communication malfunction between control board and IPM board J4
18 High pressure protection J5
19 Low pressure protection J6
20
Outdoor IPM module temperature sensor malfunction
P7
21 AC voltage protection J8