MCAC-CTSM-2018-1
Flooded type water cooled screw chiller (MIC)
101
red reset button when a fault happens. Faults on screen must be confirmed and cleared manually;
when both temperature and time conditions are satisfied, the chiller can restart.
When suction pressure is lower than the protective low pressure set point (effective for a time delay),
the system will stop according to the abnormal shutdown program. After the switch reset, faults on
screen must be confirmed and cleared manually. When both temperature and time conditions are
satisfied, the chiller can restart.
Anti-freezing protection
When the leaving chilled water temperature becomes lower than 4°C, perform low water
temperature protection and stop the unit according to abnormal protective shutdown program.
Cooling water pump/chilled water pump/cooling tower fan will keep on running. When leaving chilled
water temperature exceeds 10°C, the unit will reset. When both the temperature and time conditions
are satisfied, the chiller can restart.
Mechanical antifreeze switch
The switch will trip when leaving chilled water temperature is
≤
3°C and chiller will stop according
to abnormal protective shutdown program. Reset at 10°C and fault on screen must be cleared
manually; when both temperature and time conditions are satisfied, the chiller can restart.
Compressor motor protection
Alarm when compressor protection module trips. Execute the abnormal protective shutdown
program immediately. Faults on screen must be confirmed and cleared manually; when both
temperature and time conditions are satisfied, the chiller can restart.
Compressor overload protection
Thermal overload relay trips when heat storage reaches the tripping point. Faulted compressor will
stop immediately to abnormal protective shutdown program and other normal system will keep on
running. After the switch reset, fault on screen must be confirmed and cleared manually; when both
temperature and time conditions are satisfied, the chiller can restart.
Oil level protection
When the unit is running, if the oil level stays lower than the set point for 30s, the unit will stop
immediately via the protective shutdown program. After resetting the switch, faults on screen must
be confirmed and cleared manually; when both the temperature and time conditions are satisfied,
the chiller can restart
High cooling leaving water temperature protection
When the leaving cooling water temp. is higher than 45°C when the unit is operating, the chiller will
stop immediately via the protective shutdown program. Resetting at 38°C needs to be confirmed
and cleared manually; when both temperature and time conditions are satisfied, the chiller can
restart.