American Power Conversion PMH3XLM Status Panel with Surge Counter Option, Phase A Phase B

The audible alarm can be silenced by pressing the "Mute Alarm" button on the touchpad, until a qualified electrician or service person is available to service the unit. The red "Service" LED will continue to be illuminated even though the audible alarm has been silenced. This will continue until the fault condition has been cleared.

Have the electrician use the Service Manual to locate and repair the fault.

Status Panel Controls, Indicators, and Alarms

All indicators and controls are located on the front diagnostic panel (Figure 3) of the PMH3XLM unit. Each phase features a tri-color LED indicator. Green indicates correct operation. Amber indicates reduced protection. Red indicates loss of protection. If an inoperative condition were to occur, the built-in audible alarm will sound and the red Service LED will illuminate. This indicates that the unit needs evaluation by a qualified electrician or technician. Until a qualified person evaluates the unit, press the Mute Alarm touchpad to silence the alarm. (The LED indicator above the Mute Alarm touchpad illuminates when the alarm is deactivated. Normal operation occurs with the Mute Alarm LED extinguished.) The red Service LED will remain illuminated even though the Audible Alarm has been silenced. The Test touchpad tests the red Service LED and the Audible Alarm.

If LEDs are illuminated in a manner that suggests contradictory information, there may be an internal logic problem and the unit needs replacement. If none of the LEDs are illuminated, the unit may not be installed correctly. Please note that the internal storage capacitor for surge counter backup must be energized for about 15 minutes before the “count” push button will function. If a green LED is not illuminated and is suspect of being faulty, a qualified electrician or technician may attempt to diagnose the problem by de-energizing the unit, removing the front cover and exchanging ribbon cable leads with another phase (if available). Upon reenergizing the PMH3XLM, the appropriate LED will illuminate if the suspect LED has failed. If troubleshooting indicates a failed LED, please contact APC Technical Support at: 800-800-4APC.

R

SurgeArrest® PM

Test: Tests the red Service LED and audible alarm

Phase A Phase B

Reset: Resets the optional surge counter.

Mute Alarm: Turns the Alarm off. (Note that the alarm is de-activated when the LED is lit).

Phase C

Service

Test Reset Mute

Alarm

Phase A, B, and C: Tri-color LED status indicators: Green = Full protection

Amber = Partial protection Red = No protection

Service: LED illuminates for any amber or red indication.

Figure 3. Status Panel with Surge Counter Option

Audible Alarm and Control

The PMH3XLM device is equipped with an audile alarm which will sound in the event of an alarm condition. In addition, the red Service LED will illuminate, indicating the device needs service. Press the Mute Alarm touchpad to silence the alarm. The red Service LED will remain on even though the alarm is silenced. The Audible Alarm can be tested by pressing the Test touchpad. This tests the alarm regardless of the Mute Alarm status. The Test touchpad tests the red Service LED and the Audible Alarm.

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