204 Alarms: What They Mean And What To Do About Them - Unity I UT3K Manuel D'utilisation

The Keyswitch
Using the keyswitch, you can put the UPS in auto mode, shut the unit off, or put the unit in internal bypass mode.
• Auto:
• Off:
• Bypass:
The EPO Reset Button
If the UPS shuts down because of an Emergency Power Off (EPO) signal sent to its communication port, use this
button to restart the unit. After an EPO shutdown, the UPS' four-digit display scrolls EPO. The EPO reset button
does not serve as a reset button for any other purpose. See Appendix A for more information on EPO.

204 Alarms: What They Mean and What to Do About Them

The UNITY/I alerts you to some UPS
conditions. If the UPS detects an alarm
condition, it:
• lights the red ALARM light.
• sounds an audible alarm.
• shows an alarm code on the four-digit
display (see Figure 10).
Codes A-08 (Low Battery) and A-16 (Auto
Bypass) are not alarm conditions. When
either of these codes are displayed, the red
ALARM light will not be on and the UPS
will not sound an audible alarm.
Here's how to react:
1. If you want to silence the audible alarm, press and release the [
does not correct the condition that caused it; the ALARM light stays lit to remind you that the alarm condition still
exists. If the UPS detects a new alarm condition, it will sound a new audible alarm.
2. Read the alarm code(s) on the four-digit display. If more than one alarm condition exists, the four-digit display will
show each alarm code, one at a time. If the display shows a dot moving from right to left, press any of the front
panel keys to display the alarm code(s).
3. Find the alarm(s) in Table 2. The table tells what the alarm means and gives a possible solution. If the table tells you
to phone Best Power's Worldwide Service, phone the nearest Best Power office (in the U.S.A. and Canada, call
1-800-356-5737). Please have the UPS serial number available when you call; you will find this number inside your
unit's front door. Call from a telephone that is as near the UPS as possible.
When the keyswitch is turned to "Auto," the UPS provides computer-grade power to your
equipment. Usually, the UPS operates on AC line power, filtering and regulating utility power.
When necessary, the UPS switches to battery power.
When the keyswitch is turned to "Off," the UPS is off and does not provide power to the
connected equipment. See Section 206 for information on completely shutting down the UPS.
When the keyswitch is turned to "Bypass," the unit provides power to your connected equipment,
but the UPS does not regulate this power, and the UPS cannot provide battery backup power.
However, the UPS does provide lightning protection, noise protection, and isolated output.
Figure 10
L I N E B A T T E R Y
A -00
Alarm Code
] key. Note that silencing the audible alarm
CANCEL
9
Alarm Light "On"
BYPASS
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