LT-S-(L) Technical manual
sides of the piston. As a result, the piston can be controlled by discharging the high
pressure lubricant at one side to low pressure, letting it flow to the low pressure side
so that the slide valve will move with the piston to realize the loading and unloading
of the compressor.
The purpose of the piston spring is to push the piston to its initial position (min.
load position), so as to realize the automatic unloading start. It not only reduces the
mechanical impact on the compressor's moving parts, but also reduces the electrical
current during compressor start up.
Stepless capacity control, solenoid valve(SV1:unloading, SV3:50%, SV5:100%)
is controlled by a micro controller or a thermal switch to adjust the piston smoothly to
stably control cold output. If the oil filter capillary or solenoid valve of the capacity
modulation system don't work properly, it will cause the capacity modulation system
to be abnormal and fail.
Figure 3-1.Capacity Modulation System
