Troubleshooting guide

35
Compressor Alarm and Trip
· Low Suction Pressure Setpoints 1&2 – This
is the low suction pressure safety. This safety
is active in both temperature and pressure
control modes. An alarm or trip will be ac-
tive on a drop in suction pressure below the
setpoint value.
· High Discharge Pressure Setpoints 1&2
This is the high discharge pressure safety.
The alarm or trip will be active on a rise in
discharge pressure above the setpoint value.
Low Oil Separator Temperature – This is
the lowest allowable oil separator tempera-
ture. The compressor will not be allowed to
run if the Oil Separator Temperature is be-
low the trip setting. After the compressor
starts, the alarm or trip will be active if the
oil temperature in the separator drops below
the setpoint value.
· High Discharge Temperature – This is the
high discharge temperature safety. The alarm
or trip will be active if the discharge tempera-
ture should rise above the setpoint value.
· Low Oil Separator Start Temperature – This
is the starting low oil separator temperature
safety. The compressor is prevented from
starting or running if the oil in the separator is
below the trip value. After a time delay (Oil
Separator Temperature Safety Changeover),
this safety is deactivated and the Lo Oil Sepa-
rator Run Temperature is the active setpoint.
· Low Oil Separator Run Temperature – This
is the running low oil separator temperature
safety. After a time delay (Oil Separator Tem-
perature Safety Changeover), the Lo Oil Sepa-
rator Start Temperature is bypassed and Lo
Oil Separator Run Temperature is the active