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30 | alemite Carbon Shield Service Sheet
Alarm List
Air and Mist related alarms
1. blockage – Issued when a mist pressure
increase from the set point value, equivalent
to approximately 0.5 CFM, is detected by the
pressure sensor. There is a time delay of
5 seconds before the alarm is issued.
2. Leakage – Issued when a mist pressure drop
from the set point value, equivalent to
approximately 0.5 CFM, is detected by the
pressure sensor. There is a time delay of
5 seconds before the alarm is issued.
3. Low mist pressure – Issued when the pressure
sensor detects a mist pressure below Set Point.
There is a time delay of 5 seconds before the
alarm is issued.
4. High mist pressure – Issued when the pressure
sensor detects a mist pressure above Set Point.
There is a time delay of 5 seconds before the
alarm is issued.
5. Mist Pressure sensor fault – Issued when the
PLC detects the mist pressure input to be out
of 4-20mA range. There is no time delay.
6. Vacuum sensor fault – Issued when the PLC
detects the vacuum sensor input to be out
of 4-20mA range. There is no time delay.
7. High air temperature – Issued when the air
thermocouple detects an air temperature above
170°F (76.7 degrees C). There is no time delay.
8. Low air temperature – Issued when the air
thermocouple detects an air temperature
below 85°F (29.4 degrees C). There is no
time delay.
9. Air temp sensor fault – Issued when the PLC
detects the air thermocouple input to be out
of range. There is no time delay.
10. wrong cfM Hi – Issued when the mist
pressure is at 20”H2O (or other chosen set
point) but the mist flow is greater than
the default value by 30%. This may be an
indication of having selected a nozzle size
in the HMI Set Up screen that is smaller than
the one actually installed. Another possible
cause is a large leakage in the distribution line.
There is a time delay of 5 seconds before the
alarm is issued.
11. wrong cfM Lo – Issued when the mist
pressure is at 20”H2O (or other chosen set
point) but the mist flow is less than the
default value by 30%. This may be an indication
of having selected a nozzle size in the HMI Set
Up screen that is bigger than the one actually
installed. Another possible cause is a large leak-
age in the distribution line. There is a time delay
of 5 seconds before the alarm is issued.
12. Mist pressure set point change – Only issued
when the mist pressure is changed using the
Change Parameters screen in the HMI. This
alarm is meant to inform you that you are
changing a key parameter in the system from
the original/last set up values. This alarm
also warns the user that a change in oil
consumption will follow. No time delay.
13. check Air supply or transducer fault –
Issued when the transducer regulator is out
of range of 4-20mA. Large leakage or blockage
and/or the loss of enough air supply pressure
are generally the causes for this alarm.
Troubleshooting this problem is outside
the scope of this manual. Please contact your
Alemite representative. There is no time delay
for this alarm.
Summary of Contents for Carbon Shield
Page 1: ...INSTALLATION OPERATION AND MAINTENANCE MANUAL ...
Page 2: ......
Page 4: ...2 www alemitecarbonshield com Fig 01 ...
Page 5: ...Alemite Carbon Shield Service Guide 3 www alemitecarbonshield com Fig 02 ...
Page 39: ...Alemite Carbon Shield Service Guide 37 www alemitecarbonshield com ...
Page 57: ...References Installed Arrangement Fig 95 Fig 95 www alemitecarbonshield com ...