Normal Operation; Diagnostic Codes; Diagnostic Mode - Johnson Controls EMCOMMS Series Installation Instructions

NORMAL OPERATION

When powered, the EMCOMMS meter will start up in Normal
Operation. In Normal Operation, there are 4 sets of LEDs that
provide status indications:
 CVT Status LEDs
 Line Status LED
 Device Status LED
y RS485 Status LED
Figure 13: EMCOMMS Status Indication LED Diagram
The color of each LED will indicate conditions of the system:
Green = Normal

Yellow = Warning: See Diagnostic Mode

Red = Error: See Diagnostic Mode

If LEDs y are green
no conditions that require diagnostics.
If any of LEDs y are yellow
proceed to Diagnostic Mode below.
If one or more of your LEDs is blinking:
-CVT Status LEDs  will blink when no load is present
-Device Status LED  will blink when a non-factory default
setting has been selected
-RS485 Status LED y will blink to indicate network traffic

DIAGNOSTIC MODE

Diagnostic Mode identifies and displays potential issues causing
one or more of the LEDs y to appear yellow
during Normal Operation. Diagnostic Mode is not available if all
LEDs y display green
 CVT Status LEDs
 Line Status LED
 Device Status LED
 Setup Button
y RS485 Status LED
Figure 14: EMCOMMS Diagnostics LED Diagram
Use Figure 15: Diagnostic Mode Navigation Flowchart shown
below along with Table 1. Diagnostic Codes to determine
underlying conditions.
NORMAL OPERATION
2s
P
DIAGNOSTIC MODE
Code
All LEDs  may display
P
diagnostic codes. Match the LED
Code
location, color and blink pattern to a
(if present) condition in Table 1. Diagnostic Codes.
P
o view if any additional codes are
T
Last Code
present, press
(if present)
advance.
P
Figure 15: Diagnostic Mode Navigation Flowchart
The EMCOMMS Series Meter will return to Normal Operation
after 60 seconds of inactivity, or by manually exiting Diagnostic
Mode using Figure 15: Diagnostic Mode Navigation Flowchart.

Line Status Device
LED Status LED
EMCOMMS
 RS485
Status LED
Setup Bu�on
(blinking or solid), then there are

or red (blinking or solid)
 

.


Line Status Device
LED Status LED
EMCOMMS
RS485

Status LED
Setup Bu�on

Normal Operation:
If any LEDs  display yellow
or red a diagnostic code is present
Enter Diagnostic Mode:
P
Press Setup Button 
Exit Diagnostic Mode:
2s
Hold Setup Button  for 2 seconds
Setup Button  to
P

DIAGNOSTIC CODES

Diagnostic codes are presented one at at time, using LED
location, color, and sequence to indicate an installation concern.
A diagnostic code will repeat every 3 seconds until the user
proceeds to the next diagnostic code or the meter returns to
Normal Operation.

Table 1. Diagnostic Codes
 CVT LEDs
 Line LED
 Device LED
or red

y RS485 LED

Figure 16: Diagnostic Codes Table Key
EMCOMMS Series Meter - Installation Instructions
Indication Corrective Action
Negative power Verify CVT orientation toward
load
Phase Loss Check phase voltage and
current
Low power factor If not low PF, ensure voltage
(<0.5) legs match with CVTs
Frequency out of Frequency is below 38Hz or
range above 150Hz
Over voltage Ensure system voltage does
not exceed 600VAC
Over current Replace with a larger
amperage rated CVT
Indication Corrective Action
Mismatched voltag- Ensure desired voltages are
es on power sensors being monitored
Not a three phase Verify system type
system
Reversed Phase Swap any two CVT meter
Order inputs if not intentional
Indication Corrective Action
Low supply voltage Ensure voltage to meter is
12-30VDC/24VAC
Temperature Relocate meter to suitable
warning environment
Indication Corrective Action
Noise Warning Check line terminations, baud
rate settings
Lost Next Master Allow device to continue
network analysis. Confirm
other devices on network
are communicating properly
(BACnet Only)
No RS485 Traffic Ensure device is on active
network
Dropped I-HAVE Allow more time between
reply WHO-HAS queries (BACnet
Only)
Detecting Baud Rate Wait for enough network traffic
to auto-detect or manually set
using Edit Settings
Detecting Protocol Wait for enough network traffic
to auto-detect or manually set
using Edit Settings
Detecting Address Ensure network has free MS/TP
master addresses
Address Collision One or more devices have
duplicated addresses
Parity Error Check connection settings
(protocol, baud rate, serial
format, address)
Framing Error Check serial formats and baud
rate
Frame Too Large Program controller for smaller
frames
or indicates a fast blink (200 ms)
or indicates a slow blink (1 sec)
4