Machine Protection
and Adaptive
Control
Momentary Power Loss (MPL) Protection.
Improved power measurement and protection algorithms allow the unit to accommodate more power anomalies than ever. If the chiller must shut down, faster restarts get the machine up and running as soon as possible.
Momentary power loss (MPL) detects the existence of a power loss to the compressor motor and responds by initiating the disconnection of the compressor motor from the power source. Power interruptions of less than 30
interruptions can be damaging to the motor and compressor if the chiller is reconnected to the line while the motor and line phases do not match. The chiller will be shut down when a MPL is detected and will display a
MPL’s greater than 2 or 3 cycles are detected resulting in unit shut down. Disconnection from the line is initiated within 6 line cycles of the power loss. MPL protection is active anytime the compressor is in the running mode. (The transition complete input has been satisfied).
MPL is enabled however can be disabled, if required via the service tool.
Figure 29. Sequence of operation: momentary power loss, (DynaView™ and starter module remain powered)
Enforce Stop to Start Timer
(5 to 200 Seconds 7 Sec is Default)
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