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Operating Instructions
30
4.2 Basic Monitor Panel (Units Without Monitoring)
Alarm Present/Silence
Upon occurrence of a transformer overtemperature condition, the “Alarm Present/Silence” switch will
become illuminated and the audible alarm will be activated. Pushing the “Alarm Present/Silence”
switch will silence the audible alarm. The cause of the overtemperature condition should be investi-
gated and corrected. Possible causes include transformer overload, excessive non-linear loading, inade-
quate ventilation, high or low input voltage, or monitoring malfunction. Failure to correct the
overtemperature condition may result in an automatic system shutdown due to the second stage of
overtemperature sensing. After correction of the alarm condition, the alarm will automatically reset.
Figure 17 Basic monitoring panel
4.3 Power Monitor Panel
Monitored Parameters - A 4 x 20 character LCD is provided to indicate the input voltages (line-to-
line), output voltages (line-to-line and line-to-neutral), output currents (each phase, neutral and
ground), output voltage THD, output current THD, crest factor, K-factor, output kVA, kW, kWH,
power factor, percent load and output frequency. Pressing the Scan switch will activate the
“Autoscan” mode where all monitored parameters are sequentially displayed automatically. Momen-
tarily pressing the “Hold/Sequence” switch interrupts the “Autoscan” mode. Pressing the “Hold/
Sequence” switch allows manual selection of the sequentially displayed parameters.
Figure 18 Power monitor panel
Liebert FPC
EMERGENCY
POWER
OFF
FPC16000
ALARM
PRESENT
SILENCE
Liebert FPC
EMERGENCY
POWER
OFF
FPC16001
ALARM
PRESENT
SILENCE
OUTPUT VOLTAGE
X – N = 120
Y – N = 120
Z – N = 120
X – Y = 208
Y – Z = 208
Z – X = 208
SCAN
HOLD
SEQUENCE