M thermal Mono
36 200204
Midea M thermal Mono Service Manual
Table 4-2.1: Main PCB for hydronic system
Port for temp. sensors (T2,T2B,TW_out,TW_in, T1,)
Port for temp. sensor(Tbt1, The balanced water tank of up temp. sensor)
Port for temp. sensor(Tbt2, The balanced water tank of up temp. sensor)
Port for temp. sensor(T5, domestic hot water tank temp. sensor)
Port for temp. sensor(Tw2, The outlet water for zone 2 temp. sensor)
Port for temp. sensor(Tsolar, Solar panel temp. sensor)
Control port for room thermostat (heating mode)(HT)/Control port for room thermostat (cooling
mode)(CL)/Power port for room thermostat(COM)
Port for smart grid (grid signal, photovoltaic signal)
Port for remote switch, temperature board
Communicate port between indoor unit and outdoor unit
Port for communication with the wired controller
Communicate port between indoor unit and outdoor unit, port for communication with the wired
controller, internal machine parallel
Port for antifreeze E-heating tape(external), additional heat source, compressor run/defrost run
Control port for tank booster heater, internal backup heater 1, input port for solar energy, Port for room
thermostat, SV1(3-way valve), SV2(3-way valve), SV3(3-way valve), zone 2 pump, outside circulation
pump, solar energy pump, DHW pipe pump,
Feedback port for external temp. switch(shorted in default)
Feedback port for temperature switch
Control port for backup heater/booster heater
Port for anti-freeze electric heating tape
Port for anti-freeze electric heating tape
Port for anti-freeze electric heating tape
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