HP PowerTrust A3589A, Manual

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4-6 Chapter 4
Power-On/Power-Off Procedures
Service Bypass
• Battery LED: off
• Attention LED: on
• Audible Alarm: solid tone (The alarm may be silenced by pressing the Silence
Alarm/Test switch.)
CAUTION
If the Caution LED is flashing, STOP! You may interrupt AC input to the
connected equipment if you attempt to place the UPS in Service Bypass mode.
Perform an orderly shutdown of the system before proceeding.
6. Press and hold the red Bypass button while turning the Bypass switch to
BYPASS
, then
release the red Bypass button.
The UPS is now in Service Bypass mode.
Taking the UPS Out of Service Bypass Mode
The UPS should be taken out off Service Bypass mode only by qualified service personnel
or under their direction.
1. Check that the UPS is ready to be returned to Normal mode. If the UPS was serviced,
ensure that all components are installed and properly connected.
2. Set the Output On/Output Off switch to
Output ON
.
3. Set the MAIN INPUT breaker to ON.
4. Set the UPS/BATTERY switch to
ENABLE
.
5. Confirm that the UPS has powered on properly and is ready to be returned to Normal
mode by checking the following indicators:
• AC Output LED: on
• Battery LED: off
• Attention LED: on
• Enable LED: on
• Caution LED: off
• Audible Alarm: solid (The alarm may be silenced by pressing the Silence Alarm/Test
switch.)
6. If the indicators are as specified above, continue. If any of the indicators differ from
these STOP! The UPS should not be taken out of Service Bypass mode. You may
interrupt AC output to the connected equipment if you attempt to do so. Refer to
Chapter 6, “Troubleshooting,”to identify the problem.
7. Turn the Bypass switch to
NORMAL
. This places the UPS in Automatic Bypass mode.
8. Turn the Output On/Output Off switch to
Output Off
for about one second, then switch it
back to
Output On
. This step returns the UPS to Normal mode and clears the audible
alarm.