Chicago Pneumatic QRS 10, Инструкция, Страница: 27 / 86

3 Controller
3.1 Controller
Control panel
Introduction
In general, the controller has following functions:
• Controlling the compressor;
• Protecting the compressor;
• Monitoring service intervals;
• Automatic restart after voltage failure (made inactive);
Automatic control of the compressor
The controller maintains the net pressure between programmable limits by automatically loading
and unloading the compressor. A number of programmable settings, e.g. the unloading and
loading pressures, the minimum stop time and the maximum number of motor starts are taken
into account.
The controller stops the compressor whenever possible to reduce the power consumption and
restarts it automatically when the net pressure decreases. If the expected unloading period is to
short, the compressor is kept running to prevent too short standstill periods.
Protecting the compressor
Shutdown temperature warning
The shutdown temperature warning is a programmable warning that advises the operator that the
shutdown temperature is nearly reached. If the measured temperature exceeds the programmed
Instruction book
2920 7114 70 25