Alpha Technologies Micro, Micro XL, Micro XL3 UPS - Manual (Page 34)

017-237-B0 Rev A 32
6.3 Switching the Alpha Micro On and Off
Under normal operation, the Alpha Micro is always powered ON to supply uninterruptible power to the load.
Switching off the Alpha Micro will disconnect the power supply to the load. If for any reason you need to switch
off the Alpha Micro while maintaining power to your critical load, make sure that you have a plan that provides an
alternate source of power.
6.3.1 Switch Off Procedure
1. Switch off the AC input circuit breaker.
2. Switch off the battery circuit breaker. The status LED turns off and the LCD panel goes blank. The
Alpha Micro is now switched off and no backup power is supplied to the load.
6.3.2 Switch On Procedure (LINE mode)
Before you put the Alpha Micro back into commission, make sure that the line is qualified and the batteries are
fully charged.
1. Switch on the battery circuit breaker. The LCD displays STANDBY and the fan turns on for about a minute. If
the temperature is below –15ºC, the LCD display may not function. See "Troubleshooting".
2. Switch on the AC input circuit breaker. The Alpha Micro qualifies the line power. The LCD displays RETRAN,
then shows LINE, BUCK or BOOST. The status LED illuminates.
3. If there is no line power, the Alpha Micro will remain in the STANDBY mode until it the line power is qualified.
If you need to provide backup battery power to the load, perform a manual start by using the Inverter
command See “Operating the Alpha Micro Inverter”.
4. The Alpha Micro uses auto-frequency detection. When it is first switched on, it senses the line frequency and
adjusts its output frequency to match that of the input. The load should be receiving power, If not, perform
troubleshooting.
6.3.3 Switching the Alpha Micro from Line mode to Inverter mode
You can force the Alpha Micro to operate in the Inverter mode by manually switching off the input circuit breaker.
Doing so will effectively disconnect any line power to the Alpha Micro simulating a power outage which triggers
the Alpha Micro to switch to the inverter mode of operation.
Procedure
1. Switch off the input circuit breaker. The LCD shows INVERTER, the status LED starts flashing to show that
the Alpha Micro is running on backup battery power. Confirm that the load is receiving power.
6.3.4 Switching the Alpha FXM from Inverter mode to Line mode
The Alpha Micro remains in the Inverter mode for as long as the input circuit breaker is switched off. Backup pow-
er is provided to the load until the batteries are drained to a preset level which triggers the Alpha Micro to shut-
down automatically. If it is not necessary to operate the Alpha Micro in the Inverter mode, switch the Alpha Micro
back to the Line mode as soon as possible.
Procedure
1. Switch on the input circuit breaker. The Alpha Micro qualifies the line power. The LCD displays RETRAN,
then shows LINE, BUCK or BOOST. The status LED illuminates.
If the Alpha Micro constantly switches between Inverter and Line modes because of a noisy line, the
Alpha Micro’s input parameters should be broadened from Normal to Generator. See “Operating the Alpha Micro
Sense Type”. Also see the specifications, “Boost/Buck/Line Transfer Thresholds”.
In the Generator mode, the range of acceptable input frequency and voltage are expanded to accept the fluctua-
tions created by a generator.