MCAC-CTSM-2018-1
Flooded type water cooled screw chiller (MIC)
103
7
High-pressure
Protection
High pressure switch OFF
The compressor for protection
stops running. Other
compressors continue running
Press the red reset button, and
reset manually on the touch
screen
1,The cooling water quality is poor and the heat
exchange of condenser is abnormal
2,There is too much non-condensable gas in the
system
3,The cooling water flow is too small or the
temperature is too high
4,Too much refrigerant
5,Wrong refrigerant type
6,The discharge shutoff valve does not fully open
8
Low-pressure
Protection
The low pressure switch
disconnects for more than 3s
(can be set)
1.The compressor for protection
stops running immediately.
Other compressors continue
running.
2.If protection occurs before the
unit starts to work, all
compressors in the unit cannot
run.
Reset it manually on the touch
screen
1,The refrigerant is not enough
2,EXV fails and cannot work normally
3,The delay time of low pressure switch alarm is
too short
4,There is plugging in the filter
5,Some water enters the refrigerant system in
evaporator
6,Poor system matching(the evaporator is too
small or the compressor is too large)
7,There is too much oil in the system
8,Chilled water flow is too small or the
temperature is too low
9
Low Oil Level
Protection
The oil level switch
disconnects for more than
60s (can be set)
The compressor for protection
stops running immediately.
Other compressors continue
running
Reset it manually on the touch
screen
1, The oil temperature is too low when starting so
the pressure difference is too low and return oil is
abnormal
2,Return oil solenoid valve fails or the filter is
blocked
3,Different oil types have been mixed so the
return oil system is abnormal
4,Oil level switch failure or wrong wiring
connection
5. The oil volume is not enough
