Programming Guide

VAV-SVP01A-EN 23
VAV Start Up/Check Out Procedure
Yellow Comm LED
The yellow Comm5 LED blinks whenever another controller is transmitting. However, the yellow
Comm5 LED does not blink when the controller is transmitting data. The yellow Comm5 LED cannot
distinguish between messages meant for the controller and messages that the controller ignores.
Ta ble 6, p . 2 3 shows and describes the yellow Comm LED activity.
Service Push Button
Important: If the Service button is held down for more than 15 seconds, the controller will
uninstall itself from the Comm5 network. The red service LED flashing
approximately once two every seconds indicates this mode (see Red service LED
above). Use the Rover service tool to restore the unit to normal operation. Refer the
Rover product literature for more information.
The Service push button can be used, as one of several methods, to install the controller in a
communication network. Refer to the Rover service tool product literature EMTX-SVX01*-EN for
more information.
Space temperature controller Analog Inputs
Zone Sensor Hardwired Option. Depending on the zone sensor options used, a maximum of
five wires may be required to run from the VAV VV550 Controller to the zone sensor. The zone
sensor options are:
• Zone sensor only (2 wires) - Part Number X13511528010.
• Sensor with night set back- Part Number X13511530010.
• Zone sensor with external adjustable - Part Number X13511529010.
• Zone sensor with external adjustable night set back, timed override (TOV) on/cancel button -
Part Number X13511527010.
• Digital zone sensor - Part Number X13511530010
• Communications jack - Part Number X13651467020 (for one box of 12)
Note: All wiring from the zone sensor to the Com link must be twisted shielded pair wiring.
Table 6. Yellow comm LED activity
Yellow Comm LED activity Description
LED Off continuously The controller is not detecting communication. (Normal for stand-alone applications.)
LED blinks or flickers The controller detects communication. (Normal for communicating applications, including data sharing.)
LED On continuously Abnormal condition or extremely high traffic on the link.
Table 7. Red service LED activity
Red service LED activity Description
LED is Off continuously after power is applied to the controller. Normal operation
LED is On continuously, even when power is first applied to the
controller.
Someone is pressing the Service push button or the controller failed.
LED flashes about once every two seconds. Uninstalled (normal controller mode). Use the Rover service tool to restore
the unit to normal operation. Refer to the Rover product literature for more
information.