MrCool DIY E Star Series Installation & Owner's Manual page 46

Remarks:
• Use a multimeter to test the DC voltage between 2 port(or S or L2 port) and 3 port(or N or S port) of the
outdoor unit. The red pin of the multimeter connects with 2 ports (or S or L2 port) while the black pin is for
3 port (or N or S port).
• When AC is normal running, the voltage is moving alternately as positive values and negative values
• If the outdoor unit has malfunction, the voltage has always been the positive value.
• While if the indoor unit has malfunction, the voltage has always been a certain value.
• Use a multimeter to test the resistance of the reactor which does not connect with capacitor.
• The normal value should be around zero ohm. Otherwise, the reactor must have malfunction.
Note: The picture and the value are only for reference, actual condition and specific value may vary.
The error codes and descriptions are for reference only. If your system displays any of
these codes contact a qualified technician to investigate the matter further.
Page 45
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S and N
or
L2 and S
or
2 and 3