Flooded type water cooled screw chiller (PCB Control)
MCAC-CTSM-2012-11
50
If the high/low voltage deviates much from the saturation pressure corresponding to the current
temperature (more than 2bar), leakage or insufficient refrigerant is likely in the system.
(2) Inspect the unit for normal heating
Before start-up, it is necessary to inspect whether the oil heating in the unit is available, and
whether the oil heater does not work when there is oil for heating but no power supply. It is
particularly important in winter when the temperature is low and the failure of oil heating might
lead to poor lubrication of the unit. The optimum working temperature for current types of
lubricating oil is generally around 40
℃
.
(3) Inspect whether there is alarm for trouble of the display screen. if there is, the trouble must be
corrected.
(4) Inspect the electronic expansion valve control module for alarm trouble.
(5) Inspect whether various temperature points displayed on the display screen are within the
normal range.
Before the operation of the unit, the showed temperatures of discharge and fin and the ambient
temperature are close to the current actual ambient temperature, and whether the entering and
leaving water temperatures are close to the water temperature at the user side. If there is any
obvious deviation of the above temperatures, inspect whether the temperature sensor is in
normal condition and whether the connection is firm and reliable.
15 0.39
20 0.47
25 0.57
30 0.67
35 0.79
40 0.92
Values of various
temperature and
pressure points
showed in the main
page of the unit.
Compressor oil
heater begins to
work when the
unit is electrified.