Orion System VCM-X Modular E-BUS - Manual (Page 68)

Zone
Zone
TROUBLESHOOTING
VCM-X Modular E-BUS Controller Technical Guide 68
Using LEDs To Verify Operation
The VCM-X E-BUS Controller is equipped with 4 LEDs that can be
used as very powerful troubleshooting tools. See Figure 43 below for
the LED locations. The LEDs and their uses are as follows:
REC
- This LED will light up to indicate system communications.
POWER
- This LED will light up to indicate that 24 VAC power has
been applied to the controller.
STATUS 1 - This is the diagnostic blink code LED. It will light up
and blink out diagnostic codes. STATUS 1 LED also represents the tens
column in the address blink code.
STATUS 2
- This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. STATUS 2 LED also represents the ones
column in the address blink code.
POWER LED Operations
When the VCM-X E-BUS Controller is powered up, the POWER LED
should light up and stay on continuously. If it does not light up, check to
be sure that you have 24 VAC connected to the controller, that the wiring
connections are tight, and that they are wired for the correct polarity. The
24 VAC power must be connected so that all ground wires remain com-
mon. If after making all these checks, the POWER LED does not light
up, please contact WattMaster Controls Technical Support for assistance.
REC LED Operations
When power is applied to the controller, the REC LED will also light
up. If this is a Stand Alone System (one controller only on the loop)
or an Interconnected System (several VCM-X E-BUS Controllers tied
together without a CommLink), the REC LED will glow continuously.
The REC LED will fl icker when you are connected to the VCM-X E-BUS
Controller and you are entering setpoints with the Modular Service Tool
or one of the System Managers. It will also fl icker if this is a Networked
System. If this is a Networked System (the system has a CommLink
installed), the REC LED should fl icker rapidly, indicating that the system
is communicating. A “fl icker” is defi ned as a brief moment when the
LED turns off and then back on. It may be easier to see this “fl icker” if
you cup your hand around the LED.
If the REC LED does not operate as indicated above, fi rst check the
address switch setting. Verify the address switch as outlined in the Di-
agnostic LEDs Operations section on page 69. See Figure 41 on page
48 for complete address switch setting instructions.
NOTE: STATUS 1 LED represents the tens position and STATUS
2 LED represents the ones position of the controller address. If the
address of the controller is set to 59 with the address switch, fi rst
STATUS 1 LED will blink 5 times, and then STATUS 2 LED will
blink 9 times.
If the address switch setting is correct and the REC LED still does not
behave as indicated above, check to be sure the operator’s interface is
connected correctly. If you are using the Modular Service Tool, verify
that it is plugged in securely to the DIN connection on the VCM-X
E-BUS Controller. If you are using one of the System Manager Opera-
tor’s Interfaces, see the VCM-X / RNE Controller Operator Interfaces
SD Technical Guide or the System Manager TS Operator Interfaces
Technical Guide for a connection diagram.
If the REC LED still does not behave correctly, check the voltages at
the communications terminal block. Be sure the Controller is powered
up for this test. Unplug the communications terminal block from the
controller and check the DC voltage between T and SHLD and between
R and SHLD. Check the voltage with a digital multimeter set to DC
volts. The voltage should be between 3.0 to 3.2 VDC between SHLD
and either T or R. If the voltage is not in this range, you probably have
a damaged driver chip that must be replaced.
For driver chip replacement instructions, please see the Orion Controls
VCM-X Component & System Wiring Technical Guide for more informa-
tion or contact the factory for further assistance.
LED Diagnostics
RS-485
Communications
Driver Chip
Communications
LED
POWER LED
Diagnostic
Blink Code
LEDs
STATUS 1
STATUS 2
Relay Output
LEDS - Typ. of 5
10A250VAC ~
5A30VDC
SA
VDE
G5Q-1A4
OMRON
DC24V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
G5Q-1A4
OMRON
DC24V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
G5Q-1A4
OMRON
DC24V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
G5Q-1A4
OMRON
DC24V
CHINA
10A250VAC ~
5A30VDC
SA
VDE
G5Q-1A4
OMRON
DC24V
CHINA
Figure 43: VCM-X E-BUS Controller Diagnostic LED Locations