Schneider Electric PM850 Manual De Usuario

© 2011 Schneider Electric. All Rights Reserved.

The information in Table 10–1 on page 72 describes potential problems and their possible 
causes. It also describes checks you can perform or possible solutions for each. If you still 
cannot resolve the problem after referring to this table, contact the your local Schneider 
Electric sales representative for assistance.

The heartbeat LED helps to troubleshoot the power meter. The LED works as follows:

•

Normal operation — the LED flashes at a steady rate during normal operation.

•

Communications — the LED flash rate changes as the communications port transmits 
and receives data. If the LED flash rate does not change when data is sent from the 
host computer, the power meter is not receiving requests from the host computer.

•

Hardware — if the heartbeat LED remains lit and does not flash ON and OFF, there is 
a hardware problem. Do a hard reset of the power meter (turn OFF power to the power 
meter, then restore power to the power meter). If the heartbeat LED remains lit, contact 
your local sales representative.

•

Control power and display — if the heartbeat LED flashes, but the display is blank, 
the display is not functioning properly. If the display is blank and the LED is not lit, verify 
that control power is connected to the power meter.

• Apply appropriate personal protective equipment (PPE) and follow safe 

electrical practices. For example, in the United States, see NFPA 70E.

• This equipment must be installed and serviced only by qualified personnel.
• Turn off all power supplying this equipment before working on or inside.
• Always use a properly rated voltage sensing device to confirm that all power is 

off.

• Carefully inspect the work area for tools and objects that may have been left 

inside the equipment. 

• Use caution while removing or installing panels so that they do not extend into 

the energized bus; avoid handling the panels which could cause personal injury.