MCAC-HTSM-201906                            Midea R410A Direct Heating Type HPWH 50Hz Technical Manual 
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 Press the ▲ or ▼ key to adjust the main unit serial number and check 16 unit’s status information from 
#0~#9. Press    or    to adjust the check sequence number of one unit and check all the status 
information of this unit. 
 Check content: 
Water outlet temperature T1→2, Outdoor pipe temperature T3→3, Outdoor ambient 
temperature T4→4, Air exhausting temperature→ 
Compressor A current→6, Compressor B current→7, EXV opening→8, EXV opening 
Last one error or protection→10, last second error or protection→ 
Last third error or protection→12, Outdoor unit model→13, Wired controller setting 
value→1, Water outlet temperature T1…… 
3.5 Error handling 
 When the unit has error or protection, the icon will flash. Press and hold SET key for 3 seconds to enter 
check status and then press the ▲ or ▼ key to check the unit of #0~#9. If the ‘ERROR’ icon is on, it means 
the corresponding unit has error or protection at that time. The last 3 error or protection codes of the unit 
can be checked. The error icon will disappear if the error or protection is cleared. 
 For the error code, refers to trouble shooting part. 
4  Installation 
4.1 Caution 
 Stated below are important safety issues that must be obeyed. 
 Confirm there is no abnormal phenomena during test operation after complete, then hand the manual to 
the user. 
 Reinstallation must be performed by professional. 
 Do not install the unit in a place vulnerable to leakage of flammable gases. Once flammable gases are 
leaked and left around the wired controller, fire any occur.