Pwm (Pulse Width Modulation) Valve - York R-410A Technical & Service Manual

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c. This process controls the On/Off time of the valve and the rotating refrigerants in the
circle thus adjusting the capacity.
d. The cooling capacity of the outdoor units is adjusted automatically, according to the
number of operating indoor unit(s).

[3] PWM (Pulse Width Modulation) Valve

PWM valve is the valve to take away the fixed scroll by lifting up through the difference
of pressure after the digital scroll compressor being connected to the outlet and inlet of suction.
Therefore, the capacity of compressor is controlled automatically according to the operation
status such as loading when the valve is closed or unloading when the valve is opened. PWM
means the ON/OFF signal to the valve for loading /unloading.
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General information
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