Hisense AMS-07UR4SNVT4 Service Manual page 76

6 . C O N T R O L M
6 . C O N T R O L M
√―――Mode conflict will not happen
×―――Mode conflict will happen
Outdoor four-way Valve Control
Four-way valve of the outdoor machine shuts down when cooling but starts when
heating. The operation of heating defrosting refers to defrosting operation and, when the
heating remote shutdown, the four-way valve disconnects in 50s when the compressor
stops working.
Start-up Protection:
To prevent compressor from restart frequently in the condition that system pressure has
not been completely balanced, it can't be restarted within 3 minutes.
Pressure Protection:
Pressure switch is normally kept open. When the pressure grows too high, the pressure
switch will close and soft will enter pressure protection control. soft will automatically
decrease the frequency. If the pressure is still unable to return to normal condition after
decreasing frequency, compressor will stop and report the fault code of pressure protection.
O D E L
O D E L
71