Emerson Liebert iCOM Training And Service Manual page 38

iCOM
Control Training and Service Manual
High Head Pressure upon Startup continued:
If the above "situation" happens 3 times in a rolling twelve-hour period (that means
the internal counter reaches 3) the compressor will be locked out and will not
come back on until main power is reset or the S302 or S303 counters are reset to
0 (zero). "Situation" is defined exactly as above. That is if within the first 10
minutes of a compressor startup if the compressor has been off for at least 10
minutes 1, 2, or 3 high head situations have been masked out "inhibited". If this
situation has occurred 3 times with 1 to 3 high head situations being masked out in
three startup situations that have occurred within a 12 hour period, turn off that
compressor, alarm high head pressure, and lock out the compressor. The
compressor will not come back on until main power is reset or the S302 or S303
counters are reset to 0 (zero).
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