Honeywell CVL4022ASVAV1 Engineering Manual page 23

Table 11. Status LED States
LED State Blink Rate
OFF not applicable
ON ON steady;
not blinking
Very slow blink 1 second ON,
(continuous) 1 second OFF
Slow blink 0.5 second ON,
(continuous) 0.5 second OFF
Medium blink 0.25 second ON,
(continuous) 0.25 second OFF
Fast blink 0.10 second ON,
(continuous) 0.10 second OFF
Step 3. Checkout Completion
At this point the controller is installed and powered. To
complete the checkout, the NIAGARA FRAMEWORK®
application (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.
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. Replace the
controller if troubleshooting indicates a malfunction.
WARNING
Electrical Shock Hazard. Can cause severe injury, death
or property damage.
Disconnect power supply before beginning controller
replacement to prevent electrical shock or equipment
damage.
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. 22 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. Insert the
screwdriver blade no more than 1/8 in. (3 mm) to prevent
damage to the terminal block alignment pins on the controller
circuit board.
Status or Condition
No power to processor,
LED damaged, low
voltage to board, or
controller damaged.
Processor and/or
controller is not operating.
Controller is operating
normally.
Controller alarm is active,
controller in process of
download, or controller
lost its configuration.
Controller firmware is
loading.
Controller is in manual
mode under control of the
PC-based software tool.
SHORT TERMINAL BLOCK
Fig. 22. 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 1/4 in.(6.35 mm).
b. For long terminal blocks (6 or more terminals), insert
screwdriver blade on one side of the terminal block and gently
rotate the blade 1/4 turn. Then, move to the other side of the
terminal block and do the same. Repeat until the terminal
block is evenly raised 1/4 in. (6.35 mm) from its alignment
pins.
2. Once the terminal block is raised 1/4 in. (6.35 mm) 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.
Controller Replacement
Perform the following to replace the controller:
1. Remove all power from the controller.
2. Remove the terminal blocks (See "Terminal Block Removal"
on page 23.).
3. Remove the old controller from its mounting.
IMPORTANT
(FOR CONTROLLERS MOUNTED TO A DIN RAIL):
1. Push straight up from the bottom to release the top pins.
2. Rotate the top of the controller outwards to release the
bottom flex connectors (see Fig. 8 on page 12).
4. Mount the new controller (See "Installation" on page 8.).
5. Replace the terminal blocks:
• Insert each terminal block onto its alignment pins.
• Press straight down to firmly seat it.
• Repeat for each terminal block.
6. Restore power to the controller.
7. Perform "Checkout."
23
LONG TERMINAL BLOCK
M23563A
31-00083—02