Midea RSJ-420/PZN1-H - Page 17

Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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11
T3: Evaporator Temp. sensor connector
T4: Outdoor ambient Temp. sensor connector
12
Detection port for compressor current
13
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)
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Address dial code
0~3 separately stands for address 0~3, means 0~3 set units. When
dial the dial switch to 4 or more, then it will invalid.
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.
15
Left side: CHECK, spot check button, for checking the operating state of unit.
Right side: FORCE, constraint button, special function for constraint exit.
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Digital screen.
17
3-phase, 4-wire system power input. Lack of phase or wrong phase only is detected
on the initial stage of power on without detection during operation.
18
High and low fan speed.
19
Tranformer input, 220V AC current.
20
Control port for compressor.
21
Refrigerant E-heater control port.
22
Electric ball valve on.
23
Electric ball valve off.
24
Control port for crankcase E-heating belt.