MrCool DIY E Star Series Owners & Installation Manual page 39

Indoor Unit Error Display
Operation LED Timer LED
1 time
2 times
3 times
4 times
5 times
6 times
7 times
2 times
3 times
4 times
5 times
6 times
1 time
2 times
3 times
5 times
** Note that the wire colors of this series / model may differ from previous models, other series and
general conventions. All wiring must be performed in accordance with the wiring diagrams shown in
Section 7 Fig. 7.1 and associated images. Wires and terminals are numbered to match accordingly.
Troubleshooting
Display
X E0
Indoor unit EEPROM parameter error
Indoor / outdoor units communication error **
X E1
Zero-crossing signal detection error
X E2
X E3/E88 Indoor fan speed has been out of control
Indoor room temperature sensor T1 open circuit or
X E4
short circuit
Evaporator coil temperature sensor T2 open circuit or
X E5
short circuit
X EC
Refrigerant leakage detection
Outdoor ambient temperature sensor T4 open circuit
O F1
or short circuit
Condenser coil temperature sensor T3 open circuit or
O F2
short circuit
Compressor discharge temperature sensor T5 open
O F3
circuit or short circuit
Outdoor unit EEPROM parameter error
O F4
Outdoor fan speed has been out of control
O F5
P0 IPM malfunction or IGBT over-strong current protection
P1 Over voltage or over low voltage protection
High temperature protection of compressor top diag-
P2
nosis and solution (only for 9k,12k models)
P4 Inverter compressor drive error
P6 Discharge temp sensor
P7
USB Smart Controller module not installed
O（light）
X（off）
mrcool.com
LED STATUS
（flash）
Page 38