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visual indication of the BACnet MS/TP communication status.
When the controller receives power, the LED appears in one
of the following allowable states, as described in Table 7.
Table 7. BACnet status LED states
BACnet LED status
solid ON
Controller has power, loader is not
running.
solid ON, blinking OFF
Controller is in reflash mode, no
once in 2.5 sec
MS/TP communication.
solid ON, blinking OFF
Controller is in reflash mode, MS/TP
twice in 2.5 sec
communication present.
solid ON, blinking OFF
Controller is in reflash mode, MS/TP
three times in 2.5 sec
communication data transfer in
progress.
solid OFF, there is no
No power to CPU, LED damaged, low
power
voltage to board, or loader damaged.
solid OFF, blinking ON
Controller is running, no MS/TP com-
once in 2.5 sec
munication.
solid OFF, blinking ON
Controller is running, MS/TP com-
twice in 2.5 sec
munication present.
solid OFF, blinking ON
Controller is running, MS/TP com-
three times in 2.5 sec
munication data transfer in progress
Step 3. Checkout Completion
At this point the controller is installed and powered. To
complete the checkout, the N
(run on a PC) is used to configure the I/O and functions of the
controller. Refer to the Programming Tool User Guide, form
no. 63-2662, for controller configuration and programming
details.
CONTROLLER REPLACEMENT
There are no serviceable or repairable parts inside the
controller.
WARNING
Fire, Explosion, or Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Do not attempt to modify the physical or electrical
characteristics of this device in any way. If trouble-
shooting indicates a malfunction, replace the
controller.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
To prevent electrical shock or equipment damage,
disconnect power supply before beginning controller
replacement.
LYNX BACnet PROGRAMMABLE, VAV/UNITARY CONTROLLERS – PRODUCT DATA
status or condition
F
® application
IAGARA
RAMEWORK
Terminal Block Removal
To simplify controller replacement, all terminal blocks are
designed to be removed with the wiring connections intact
and then re-installed on the new controller. See Fig. 21 and
refer to the following procedure:
IMPORTANT
To prevent bending or breaking the alignment pins on
longer terminal blocks, insert the screwdriver at
several points to evenly and gradually lift up the
terminal block. To prevent damage to the terminal
block alignment pins on the controller circuit board,
insert the screwdriver blade no more than 3 mm.
SHORT TERMINAL
BLOCK
Fig. 21. Removing terminal blocks
1. Use a thin-bladed screwdriver to evenly raise the terminal
block from its alignment pins:
a. For short terminal blocks (1 to 5 terminals), insert
screwdriver blade in the center of the terminal block
and use a back-and-forth twisting motion to gently
raise the terminal block from its alignment pins.
b. For long terminal blocks (6 or more terminals), insert
screwdriver blade on one side of the terminal block
and gently rotate the blade ¼ turn. Then, move to the
other side of the terminal block and do the same.
Repeat until the terminal block is evenly raised from its
alignment pins.
2. Once the terminal block is raised from its alignment pins,
grasp the terminal block at its center (for long terminal
blocks grasp it at each end) and pull it straight up.
15
LONG TERMINAL
BLOCK
EN0Z-0959GE51 R0615
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