Clary SP170-PDA - Manual (Page 23)

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3.4 Start-up
Once the system has been properly installed, it is ready to operate. The following procedures will
explain how to start-up the system while wired into rated electrical power and also how to start-up with
no AC power available.
Normal Operation on AC Start-Up:
• Verify that the unit is wired into properly rated electrical power.
• The DC IN cable must be fully connected to the unit. Position the DC breaker to the ON position.
• Position the Bypass Switch to the UPS position on the front of the SP170-PDA.
• Position the System Power Switch to the ON position.
After switching ON, the UPS performs a self-test and the display will show:
After completion of the self-test, the display will show the default screen (values are examples).
• Battery Operation after AC Start-Up:
When Utility power is lost, the Alarm LED will blink and the display will show: (values are examples)
In stand-by mode, inverter power will be supplied to the cabinet in two timing steps to control the traffic
equipment wired to the PD system, now powering the cabinet in flash mode. In continuous mode, the
cabinet operation will continue without interruption.
If the unit is allowed to operate until batteries are exhausted, it will time out and shut off completely. If
power were to return, the unit will automatically restart and return to the condition it was in at the
moment it went into Battery Mode.
Once power is returned, if in standby mode, inverter power to the traffic equipment will be
discontinued through the UPS in a sequenced timing operation. The UPS will keep the the intersection
in flash for 30 seconds to ensure Utility power is stable. In continuous mode, the cabinet operation
will continue to operate without interruption.
DC Start Operation (Cold Start)
If no utility power is available at the time backup power is required, the unit may be started to
accomplish abbreviated tasks. The limitations of the battery prevent extended operations at full load.
• Position the DC Input Breaker to the ON position.
• Position the System Power Switch to the ON position.
• Push and hold in the COLD START switch until the audible alarm beeps.
The unit will start up similarly to normal AC start-up except the Alarm LED will continue to blink. It will
now operate as described above in battery operation.
CLARY CORPORATION
mm/dd/yy hh:mm:ss
LOAD 50% BATT 100%
AC LINE OK, INV ON
LOAD 50% BATT 90%
AC LINE BAD, INV ON