Carrier 17/19EX - Manual (Page 95)

Surge Protection
Surging of the compressor can be determined by the PIC through operator configured
settings. Surge will cause amperage fluctuations of the compressor motor. The PIC monitors
these amperage swings, and if the swing is greater than the configurable setting in one second,
then one surge count has occurred. The SURGE DELTA PERCENT AMPS setting is displayed
and configured on the Service1 screen. It has a default setting of 25% amps, SURGE
PROTECTION COUNTS can be monitored on the Maint03 table.
A surge protection shutdown of the machine will occur whenever the surge protection
counter reaches 12 counts within an operator specified time, known as the SURGE TIME
PERIOD . The SURGE TIME PERIOD is displayed and configured on the Service1 screen. It
has a default of 2 minutes.
Click here for Figure 21 — 17/19EX Hot Gas Bypass/Surge Prevention
Click here for Figure 22 — 17/19EX With Default Metric Settings