Datasheet

Installation and Operation Manual 17
Operation
LED Status Indicators The SPD diagnostic display panel shows the status of each SPD module with
diagnostically controlled green/red LEDs (see Figure 8). If a unit is operating
correctly, all of the phase LEDs will be illuminated green. To test the integrity of
the diagnostics for each phase, push the button below the phase LEDs on the
diagnostic display panel. The green LED will turn red and the alarm will sound,
if the alarm is enabled. Releasing the test button will complete the test; the red
LED will turn green and the alarm will shut off.
If an inoperable condition occurs on any phase, the audible alarm sounds and
the corresponding phase LED on the diagnostic display panel is illuminated red.
This indicates that the device needs service by qualified electrical personnel.
The audible alarm can be silenced, until a qualified person is able to evaluate
and service the SPD, by pressing the alarm enable/disable button. The alarm
will silence and the green alarm LED will not be lit. The red phase LED will
continue to be illuminated until the inoperative condition had been cleared.
On the SurgeArrest
®
module (see Figure 7), if the left green LED is not lit, it
indicates a loss of suppression from line-to-ground for that phase. If the right
green LED is not lit, it indicates a loss of suppression from line-to-neutral for that
phase. If either LED is not lit the module should be replaced.
When power is applied to the SPD and one or more of the diagnostic display
panel LEDs are red, and one or more module LEDs are out, the module should
be replaced. Refer to “Maintenance and Troubleshooting” on page 20 for proper
troubleshooting procedures.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe
electrical work practices. See NFPA 70E.
• This equipment must only be installed and serviced by qualified
electrical personnel.
• Turn off all power supplying this equipment before working on or inside
equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors and covers before turning on power to this
equipment.
• This equipment must be effectively grounded per all applicable codes.
Use an equipment-grounding conductor to connect this equipment to
the power system ground.
Failure to follow these instructions will result in death or serious injury.
Figure 7: SurgeArrest
®
Module LEDs
Left green LED lit:
L-G suppression is operating
Left green LED not lit:
Loss of surge suppression
from L-G
Right green LED lit:
L-N suppression is operating
Right green LED not lit:
Loss of surge suppression
from L-N.
Operation