Emerson 250-5000, Инструкция по установке и эксплуатации

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Energy Meter Installation and Operation Manual 026-1726 Rev 2
14 Troubleshooting
Problem Cause Solution
The maintenance wrench icon
appears in the Energy Meter
display.
There is a problem with the inputs
to the Energy Meter.
See the Alert sub-menu or the Diagnostic Alert Modbus Register
146
The display is blank after
applying control power to the
meter.
The meter is not receiving
adequate power.
Verify that the meter control power is receiving the required
voltage. Verify that the heart icon is blinking. Check the fuse.
The data displayed is
inaccurate.
Incorrect setup values
Verify the values entered for Energy Meter setup parameters (CT
and PT ratings, system type, etc.). See the
Quick Setup Instructions section.
Incorrect voltage inputs
Check Energy Meter voltage input terminals to verify adequate
voltage.
Energy Meter is wired improperly.
Check all CTs and PTs to verify correct connection to the same
service, PT polarity, and adequate powering. See the Wiring
section for more information.
Cannot communicate with
Energy Meter from a remote
personal computer.
Energy Meter address is incorrect. Verify that the meter is correctly addressed. See the
User Interface for Setup
section.
Energy Meter baud rate is
incorrect.
Verify that the baud rate of the meter matches that of all other
devices on its communications link. See the
Quick Setup Instructions section.
Communications lines are
improperly connected.
Verify the Energy Meter communications connections
(see Network Setup and Commissioning ).
Verify the terminating resistors are properly installed on both ends
of a chain of units. Units in the middle of a chain should not have
a terminator. Verify the shield ground is connected between all
units.
Table 14-1
- Troubleshooting