Routine Maintenance - Unitek ALPHA 500 iC Manual Del Usario

all possible. If used, make sure the extension cord is rated for 12 Amps.
! .Determining the Load :
1. Make a list of all equipment that requires protection.
2. Calculate the sum of all the V x A ratings. (Input voltage/current shown on name plate).
3. Ensure that the total VA rating does not exceed the rated capacity of the UPS. If rated unit capacities are
exceeded, an overload condition may occur and cause the UPS unit to shut down or the circuit breaker to trip / AC
input fuse blown.
! Connect the Load : Plug your primary equipment (e.g. computer, monitor, critical data storage device, etc.) into
the Backup Power outlets. Leave the power switches of the equipment in the "Off " position for the moment.
! Connect to Computer : Use the enclosed RS-232 (DB9) cable. Plug the 9-pin male end into the UPS. Plug the 9-
pin female end into an open COM port of the computer.
Do not plug a laser printer or copy machine into the outlets of this UPS. The power demands of these particular
devices are much higher than typical peripherals.
! Connect the Fax / Modem Lines: To protect a fax or modem, connect the telephone cable from the wall outlet to
the "IN" jack of the UPS. Connect the telephone cable from the "OUT" phone outlet on the UPS to the fax or
modem. The phone jacks on the UPS accept standard sized phone cables (RJ11 communication cables).
2.4 Operation and Functional Test
! AC Mode : The UPS delivers power to the loads from the utility and maintains battery properly charged. It also
regulates the output voltage to within a narrow range and serves to isolate the load from surges and electrical
noise brought by the utility wiring.
! On-Battery Mode : The UPS operates on battery when the line voltage or frequency has fallen outside the limits.
Local users are alerted to this mode of operation by visual and audible indicators. The UPS provides power to the
load from the battery and through its inverter and the output voltage and frequency of the UPS are regulated within
a narrow band.
Function Panel Indicator
Press and hold the main on/off switch on the front panel for 3 seconds or until you hear a beep
Switch On
sound and the "AC normal" green LED will light up.
Press and hold the main on/off switch on the front panel for 3 seconds or until hear a beep sound
Switch Off
and LED will go off.
This UPS can be turned on even without the presence of AC utility. Press and hold the main on/off
Cold Start /
switch on the front panel for 3 seconds or until hear a beep sound and the "AC normal" green LED
Start on Battery
will flash every 4 seconds.
2.5 Manual Simulation of Power Outage for the UPS
To test the backup function, you may unplug the power cord of the UPS. The UPS will beep once every 4 seconds and
the LED will flash on and off.
If the UPS is left to run continuously, it is a good idea to perform a periodic function test (at least once every month) on
the unit. Observe that your equipment operates properly and uninterrupted during this period.
To conduct a simulation-test:
! Switch the UPS on and wait for the "AC normal" indicator light up. Then unplug the UPS from the AC outlet to
simulate a utility failure.
! When utility failure occurs, power is immediately supplied to your equipment from the UPS battery. The alarm will
beep once every 4 seconds, reminding you that your equipment is running on a limited power source.
! During utility failure, manually save and close the files you are currently working on. Then, switch the UPS off to
conserve the battery power for additional testing and usage. If the utility power is not restored, the alarm will
change to rapid beeps alerting the user that the UPS will soon run out of battery power and will shut itself down.
! Restore electrical power to connected equipment by plugging the UPS power cord back into a wall outlet.
Backup all unsaved files before you perform the power outage simulation test. If monitoring software has been
installed in the computer, then verify if the software can save the file and shut down the UPS automatically
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2.6 Audible / Visual Indicators
Audible / Visual Indicators
Buzzer
" "
- - - -
"
- - - - -
" "
- - -
"
- - - - - Beep continuously
#
- - - - - Beep every 4 seconds
#
- - - - - Beep intermittently (see the note)
" #
: LED on - : LED off : LED flashing
Overload status:
AC mode : Battery mode :
! Beep 2 times every 1 second for 105% ! Beep 2 times every 1 second for 105%. After 20 seconds UPS
! Beep 2 times every 0.5 second for 140 %
! Immediately shutdown for 140%
3. Interface With Computer for UPS Status Monitoring
The built-in DB9 communication port on the UPS may be
connected to a host computer. The intelligent monitoring
software installed in the computer can get the operating
parameters and status through this channel and command
the UPS to conduct pre-defined steps to protect the data in
computer and inform the user to do all the necessary
preventive procedures.
This UPS communicates with the computer by sending out
RS-232 data streams to one of the serial ports through a 9-
in to 9-pin standard cable.
4. Service and Maintenance

4.1 Routine Maintenance

! Use dry soft clothes to clean the front panel and plastic parts. Do not use any detergent that contains alcoholic
ingredient.
! The expected lifetime of the battery is around 3 years. Improper operation and harsh environment will reduce the
actual lifetime.
! Unplug the UPS from power inlet if the UPS will not operate for a long period of time.
! Charge the battery every 3 months to recover the self discharge capacity when the UPS is in extended storage.
! When replacing batteries, use the sealed lead-acid maintenance free battery with the same voltage and capacity.
! Proper disposal of batteries if required. Refer to your local codes for disposal requirements.
4.2 Battery Replacement Overview
1.Lay down the UPS. Use the screw driver to open the
battery cover on the bottom of the unit.
Operating status
- Buck mode
- AC Normal
- Boost mode
UPS fault
On battery (AC utility failure)
Overload
will shutdown automatically ,
The pin assignment is shown in the following table:
Pin # Description
Pin 1
Pin 2 This pin is used for RS232 transmit pin (TXD).
Pin 3 This pin is used for RS232 receive pin (RXD).
Pin 4,6 Short-circuited
Pin 5 Common for Pin 8 and 1
Pin 7 DTR +5~12V (RTS).
Pin 8
Pin 9 N.C.
2.Grasp the tab attached to the battery and slide the
battery out.
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