CONTROL
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4.8.8 M1M2 dry contact control
M1M2 can be set in the wired controller for heat pump on/o control, TBH control and AHS control.
• For heat pump on/o control.
When the dry contact closes for 1s, the heat pump stops.
When the dry contact opens for 5 seconds, the heat pump switches on/o according to the setting of the
wired controller or ambient thermostat.
• For TBH control, TBH is only controlled by M1M2. If the dry contact closes, T5 <65 °C then TBH opens until
the water tank temperature reaches 70 °C.
• For AHS control In heating mode, AHS switch-on/o is only controlled by M1M2. In DHW mode, M1M2 control
does not aect AHS switch-on/o
4.8.9 Temperature probes
Sensor name Sign Mode Functions
1 Discharge temperature sensor Tp
H
• electronic expansion valve
• discharge temperature
C
• electronic expansion valve
• discharge temperature
• fans
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