MCAC-HTSM-201906 Midea R410A Direct Heating Type HPWH 50Hz Technical Manual
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as imaginary lines, when it it exeeds 20m, the power adapter is necessery.
Pay attention to the power phase sequence, if wrong connection of the phase sequence, the compressor will
not operate, and digital screen of the water heater electrical control board will display error code. Change the
phase sequence, and powering again until the digital screen does not display error and compressor starts
normally.
The water flow switch, water pump, ON/OFF singal and E-heater are only connected with the host unit, which
are not 220V control signal. So do not directly drive loading.
When the host unit has any one error of E1, E2 or E8, all the water heaters stop operation. When the main
unit has E4 error, the host unit and wired controller alarm the error, the slave units do not display error, then
all the unit can not normally heat water, and go into backup mode.
When the host unit has other errors (except E1, E2, E8), then only stop the host unit, other units will not be
affected. When the slave unit has error, only stop the operation of the error unit, other units will not be
affected.
When the main or slave unit has protecton, only stop that unit, other units will not be affected.
Dial code specification
S3-1: Remote ON/OFF functional status (OFF: inactive (default); ON: active).
S3-2: Defrost periodical choice (OFF: default time by program; ON: 28 minutes).
S3-3,4: Auxiliary heater choice (OFF: indicates 0, ON indicates 1, the factory default is 00).
Address dial code
0~9 separately stands for address 0~9 means 0~9 set units.
Each module of water heat pump has the electric control function. Set the host unit through the address dial
code on electric control board. Stipulate the unit with address dial code 0# as the host unit. Only after setting
the host unit , the function of direct communication with wired controller and other function can be
activated.
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