MrCool Universal MDUI180 E Series, Owner'S Manual

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Error Code
If the display panel or wired control displays an error code, please refer to the following table:
Number Error Code Error
1 E1 Compressor high pressure protection
2
E4 Compressor air discharge high-temperature protection
4 F2 Condenser temperature sensor error
5 F3 Outdoor ambient temperature sensor error
6 F4 Discharge temperature sensor error
7 F6 Outdoor unit tube temperature sensor error
8
9
EE Outdoor unit memory chip error
10
11
12
H4 Overload
13
H5 IPM protection
14
H6 DC fan error
15
H7 Driver out-of-step protection
16
HC Pfc protection
17
Lc Startup failure
18
19
20
21
P0 Drive reset protection
3
E3
Compressor low pressure protection
P6 Master control and driver communication error
Driver module sensor error
P8 Driver module high temperature protection
P7
P5 Over-current protection
PA AC current protection
Pc Driver current error
22
23
25
26
27
PL Bus low-voltage protection
PH Bus high-voltage protection
PU Charge loop error
ee
Driver memory chip error
e1 High pressure sensor error
C4 ODU jumper cap error
24
Page 27 mrcool.com
Troubleshooting
NOTICE
When the unit is connected with the wired controller, the error code will show simultaneously on it.