38
(
1
)
Local Automatic control
①
press down start button for starting: (Y-
△
start)
There is fives of self-test after controller is energized and it can not be started by pressing
start button .The air compressor starts by pressing start button after self-test finished. The
course of compressor’s start as followed: KM3 and KM2 are energized → Y-type status
of start → delay time is reached (Y-
△
change-over time); KM3 is de-energized (KM1
and KM3 are interlocked) and KM1 is energized → motor operates with
△
type to finish
start. During the course of starting, all electromagnetism valves are de-energized to
achieve no load start.
②
Automatic Running Control:
When the motor is started to running in
△
status and load the magnetic valve with power
applied after a certain period of delay. air compressor is loaded and pressure inside gas
tank begins to increase. When increased air pressure is more than higher pressures limit
(value of unload pressure), electromagnetism valve for loading is de-energized and
electromagnetism valve for discharging is energized, meanwhile, the air compressor
operates without load. If air pressure decreases to set lower pressure limits (value of load
pressure), the electromagnetism valve for loading is energized again and
electromagnetism valve for discharging is de-energized. Air compressor operates normally
to increase pressure in air tank. If the unload run time exceeds the set delay time of non-
load, the compressor will automatically stop motor’s operation to achieve automatic
shutdown after works without load for long time. Only when pressure decreases to lower
pressure limits, the motor start operation according to course of starting, then circularly
repeat this step.
③
. Manual loading/unloading under automatic status
When compressor in automatically runs state and runs at unload operation, press down
load or unloading button , the electromagnetism valve for loading joggles a little and
comes back to unloading status; if the pressure is less than relief pressure, the
electromagnetism valve for loading is energized and it returns to unloading status until gas
supply pressure becomes larger than relief pressure and device is at loading status.
Operation
Unloading is performed when press down unloading button “
S
”. If the pressure is higher
than loading pressure, the electromagnetism valve for loading is de-energized and turns to
Summary of Contents for CSST13020
Page 1: ...SCREW AIR COMPRESSOR CSST13020 Instruction Manual Release August 2018 ...
Page 2: ......
Page 47: ...4 5 Servicing ...