Vertiv
|
Liebert
®
PPC
™
User Manual | Rev. 6 | 03/18 |
38
4.2
Basic Monitor Panel
Basic Monitoring provides transformer overtemperature alarm, transformer overtemperature shutdown and
Emergency Power Off controls only.
4.2.1
Display Controls and Indicators
•
Power Indicator (Green LED)—Illuminates when power has been applied to the Liebert AC Power product.
•
Alarm Status Indicator (Red LED)—Illuminates when an alarm is present. The LED will remain illuminated until the alarm
condition is cleared.
•
Audible Alarm speaker (represented by the speaker symbol)—A speaker behind the bezel will sound when there is an
alarm condition.
•
Silence/Reset Push Button—Press and release the Silence/Reset button to silence the audible alarm. Press and hold the
button to clear the alarm and turn Off the red alarm indicator LED. If the alarm condition still exists the alarm will be
annunciated again.
•
Emergency Power Off (EPO) Push Button—Pressing the EPO button shunt trips the input circuit breaker to turn the unit
Off.
•
LCD—Note used.
•
Navigation keys (soft function keys F1 through F4 and Help)—Not used.
If an overtemperature condition occurs—when the transformer temperature exceeds
356°F (180°C)—it should be investigated and corrected. Possible causes include transformer overload, excessive
non-linear loading, inadequate ventilation, high or low input voltage and monitoring malfunction.
Failure to correct the overtemperature condition may result in an automatic system shutdown due to the second
stage of overtemperature sensing, when the transformer temperature exceeds 392°F (200°C). After the alarm
condition is corrected, the alarm will automatically reset.
See
Figure 17
for remote summary alarm and Remote Emergency Power Off switch connections.
Figure 20
Liebert PPC controls and indicators
Navigation keys
Alarm Silence/Reset
push button
Audible
Alarm
speaker
Alarm Status Indicator
Red
Power Indicator
Green
LCD viewing
area
Emergency Power Off
(EPO) Push Button
Содержание Liebert PPC
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