Daktronics VX-2428 User guide

201 Daktronics Drive
Brookings, SD 57006-5128
www.daktronics.com/support
800.325.8766
GENERIC SERVICE
VX-2428 GEN 2
DISPLAY SYSTEM MANUAL
25 September 2018
DD3937164
Rev 00

Copyright © 2018
All rights reserved. While every precaution has been taken in the preparation of this manual, the publisher assumes no
responsibility for errors or omissions. No part of this book covered by the copyrights hereon may be reproduced or copied
in any form or by any means—graphic, electronic, or mechanical, including photocopying, taping, or information
storage and retrieval systems—without written permission of the publisher.
Daktronics trademarks are property of Daktronics, Inc. All other trademarks are property of their respective companies.

– i –
Table of Contents
1 Introduction.........................................1
How to Use This Manual ............................1
Theory of Operation ..................................1
Vanguard®VX-2428 Power and Control
System .....................................................1
Vanguard®Software...............................1
Vanguard®Field Controller....................1
Auxiliary Control Panel ..........................2
Display Peripherals.....................................2
2 Components .......................................3
Display.........................................................3
Modules...................................................3
Vanguard®Control Board......................3
Breaker Rail .............................................3
Surge Suppressor ....................................3
Relays ......................................................3
Intake Fan and Filter...............................3
Door Sensor .............................................3
Trafc Cabinet ...........................................4
Power Supplies........................................4
Isolation Board........................................4
Cabinet Light...........................................4
Door Reporting .......................................4
Pull-Out Drawers and Shelving..............4
Panelboard .............................................4
Outlet Strip and Outlets..........................4
Exhaust Fan Assembly ...........................4
Cabinet Heater .......................................5
UPS ...........................................................5
3 Mechanical Installation .....................6
Lifting the Display.......................................6
Display Mounting.......................................6
Trafc Cabinet Mounting..........................6
Ground Mounting ...................................6
Pole Mounting.........................................6
4 Electrical Installation ..........................7
Getting Started ..........................................7
Power Installation.......................................7
Grounding ...............................................7
Power.......................................................7
Bonding Screw........................................7
Power Connections...................................7
Trafc Cabinet Termination ...................7
Display Termination................................8
Conduit Sealing ......................................8
Module Connection ...............................8
Fans and Power Supplies Connection....
..................................................................8
Trafc Cabinet ...........................................8
Vanguard® Control Board Address
Setting .........................................................9
Vanguard® Field Controller and ..............9
First Time Fire Up .........................................9
5 Maintenance and Troubleshooting 10
Getting Started ........................................10
Service and Diagnostics .........................10
Module Numbering System ....................10
7-Segment Error Codes ...........................11
Modules.................................................11
VCB ........................................................11
Isolation Board......................................12
Vanguard® Field Controller
Replacement ...........................................12
Module Replacement.............................12
VCB Maintenance...................................13
Environmental Sensor..............................13
Fan and Filter Maintenance...................13
Filter Replacement ...............................14
Fan Replacement.................................14
Trafc Cabinet Maintenance.................14
Power Supply Assembly Replacement ..
................................................................14
Trafc Cabinet Fan and Thermostat
Assembly Replacement ......................15
Trafc Cabinet Light Replacement .....15
Display Maintenance..............................15
Structure ................................................15
Earth Ground Resistance .....................15
Display Cabinet ....................................15
Temperature and Light Sensors...........15
Ventilation Fans ....................................16
Filters ......................................................16
Vanguard®Field Controller..................16
Face Panels...........................................16

– ii –
Table of Contents
Wet Outdoor Cleaning Method ..........16
Pressure Wash Cleaning Method........17
LEDs ........................................................17
LED and Electronic Circuitry ................17
Maintenance Checklist ..........................18
Troubleshooting .......................................19
6 Exchange and Repair Programs .....22
Daktronics Part Numbers ........................22
Daktronics Exchange and Repair &
Return Programs ......................................22
Exchange Program ..............................22
Before Contacting Daktronics.............22
Repair & Return Program .....................23
Shipping Address..................................24
Email ......................................................24

Introduction
1
1 Introduction
How to Use This Manual
This manual explains the installation, maintenance, and troubleshooting of VX-242X
series Dynamic Message Signs (DMS) and systems. For information regarding the safety,
installation, operation, or service of this system, refer to the telephone numbers on the
cover page of this manual.
Daktronics identies manuals by the ED or DD number located on the cover page of
each manual. For example, this manual is referred to as DD3937164.
The serial and model numbers for the display are on the ID label attached to the display.
This label looks similar to Figure 1. When calling Daktronics Customer Service, please have
this information available to ensure timely response.
Daktronics builds displays for long life, and they require little maintenance. However, from
time to time, certain components need replacing. Refer to the Daktronics Exchange and
Repair & Return Programs (p.22) if any component needs replacement or repair.
Theory of Operation
Vanguard®VX-2428 Power and Control System
The Vanguard®VX series displays employ a power on the ground system, meaning all
power and control equipment is contained in the trafc cabinet and routed to the
individual displays. Each display is controlled individually, with one Vanguard®Field
Controller per display.
Vanguard®Software
Daktronics Vanguard®software allows the DMS operator to check display status and to
control messages.
Vanguard®Field Controller
The Vanguard® Field Controller is the communication hub for DMS management; it is
located in the trafc cabinet.
The central controller creates messages and transmits them to the Vanguard®Field
Controller for storage. Upon request from the central controller or the front panel
interface, the Vanguard® Field Controller locates the message to display and sends it
to the display’s modules via the Vanguard®control board. The modules activate the
appropriate pixels to form the message.
The Vanguard® Field Controller also monitors local sensors (display-based sensors) like
temperature, light level, and door detection. The Vanguard® Field Controller interprets
sensor data for display control and diagnostic functions, such as adjusting the display’s
intensity for current lighting conditions.
Figure 1: Display ID Label

Introduction
2
Auxiliary Control Panel
The auxiliary control panel (ACP) complements the Vanguard® Field Controller by
providing a secondary control interface panel at the DMS site. The ACP allows a
maintenance technician to perform diagnostics while working in one location without
having to access the Vanguard® Field Controller in another location. This improves safety
and reduces maintenance time.
Display Peripherals
A peripheral is a display component congured through the Vanguard® Field Controller.
Peripherals include sensors, power supplies, isolation boards, fans, and heater.

Components
3
2 Components
Display
Modules
A module is a replaceable unit consisting of a display
panel with clusters of LEDs, called pixels. The pixels display
messages on the display. Refer to Figure 2.
Each module contains drive electronics that receive data
packets from the Vanguard®control board and lights the
appropriate pixels at the correct dimming level.
The module are also equipped with an on-module sensor
adds to the sensor layout by having a light sensor amid
the LEDs. The on-module sensor measures (in Lux) direct
light in addition to the cabinet sensors.
Vanguard®Control Board
The Vanguard® control board (VCB) receives high-speed serial data from the Vanguard®
Field Controller through a ber-optic or Cat-5 cable. It then distributes the signal to the
appropriate modules and sensors. The VCB receives diagnostic data from the modules,
temperature and light sensors, then transmits the data to the Vanguard® Field Controller.
The VCB uses an I/O interface to control beacons. The VCB also monitors door sensors,
ventilation fans, defog heaters, and power supplies.
The VCB uses a protocol that routes signal to each horizontal line of the display. With
this protocol, signal failure to one module in a horizontal line does not affect other LED
modules in that line.
Breaker Rail
The breaker rail distributes incoming power to the display components that require DC
power.
Surge Suppressor
The parallel surge suppressor protects the display from transient voltage spikes.
Relays
Relays are solid-state switches in which the electrical current applied across one port or
terminal controls electrical currents for another terminal, such as a beacon or fan. Relays
receive signal from the VCB.
Intake Fan and Filter
The intake fan keeps internal components and the interior of the DMS cabinet cool.
Door Sensor
Each LED section is equipped with door sensors. The sensors detect whether any of the
doors are open or closed and report this information to the controller.
Figure 2: Module (Rear View)
Note: Do not block the intake hood’s gaps at the top and bottom of the sign.

Components
4
Trafc Cabinet
Power Supplies
The power supplies provide voltage to power the modules.
Multiple power supplies provide power redundancy. If one
power supply in the group fails, the other supports the full power
load, preventing power failure to the modules.
Isolation Board
One isolation board mounts to each power supply. The isolation
board provides input and output voltage to the power supply.
Figure 3 shows an isolation board. The isolation board receives
120 VAC input voltage from the distribution panel. Output from
the power supply routes through the isolation board. From there,
the 24 VDC output routes to the DC breaker rail.
Isolation board diagnostics include power supply data sent to
the Vanguard® Field Controller about output voltage.
Cabinet Light
The trafc cabinet is equipped with a uorescent light and
sensor. The light is located on the top rack of the trafc cabinet.
The door sensor, located at the bottom of the trafc cabinet
door opening, activates the light when the cabinet door opens.
Door Reporting
The door sensor, located at the bottom of the trafc cabinet door opening, can report
whether the door(s) are open or shut. This information routes to the mini CAN I/O board,
which monitors the status of the door sensor(s) and reports the status to the Vanguard®
Field Controller.
Pull-Out Drawers and Shelving
Trafc cabinets contain a pull-out drawer and several support shelves. The shelves hold
components such as the Vanguard® Field Controller, the communication device, or a
laptop computer.
The pull-out drawer is often used for storage of extra supplies such as screws,
screwdrivers, or other hardware, and for the display and controller manuals. The pull-out
drawer also can be used as a temporary location for a laptop computer.
Panelboard
The panelboard is equipped with breakers that control power to lights, heater, and other
power circuits.
Outlet Strip and Outlets
The GFCI and utility outlet are located next to the panelboard. The outlet strip offers
several outlets for plugging in or charging electrical devices.
The outlet strip offers several outlets for plugging in control equipment.
Exhaust Fan Assembly
The exhaust fan assembly is located at the top of the trafc cabinet and includes the
exhaust fan and a thermostat. The fan and thermostat keep internal components and
the interior of the trafc cabinet cool.
Figure 3: Isolation Board

Components
5
Cabinet Heater
The heater fan is located at the bottom of the trafc cabinet. The fan, thermostat, and
heater regulate the temperature within the trafc cabinet, ensuring internal components
operate at ideal temperatures.
UPS
A UPS contains batteries and an inverter. If the utility AC power fails, the UPS powers the
Vanguard® Field Controller and communication equipment for a limited amount of time.

Mechanical Installation
6
3 Mechanical Installation
Lifting the Display
The top of each display is equipped with lift
plates at the top corners. Use all lift plates when
lifting the display. Ensure the angle between the
LED panel and the cable or chain is more than
45° before lifting; refer to Figure 4.
The lift plates are designed to carry only the
weight of the display. Do not lift the mounting
structure or other additional weight. Do not
permanently support the display with the lift
plates.
Contact Daktronics with additional questions
about lifting the display.
Display Mounting
Securely mount each display to a suitable
mounting structure provided by others.
Daktronics attached aluminum angles to the top
and bottom corners of the display for mounting.
Use all angles when mounting the display.
Use appropriate hardware to support the weight of the display. Have a qualied
engineer inspect the mounting structure.
After installing the display, inspect the top and sides of the display for any openings
that may allow moisture to enter the display. Seal openings with silicone or another
waterproof sealant. Not sealing openings will void the warranty.
Trafc Cabinet Mounting
Ground Mounting
Secure the trafc cabinet to a concrete pad using anchor bolts. Daktronics recommends
using 3/4" stainless steel anchor bolts. When anchoring the trafc cabinet to the concrete
pad, make sure the bottom of the cabinet allows for water drainage. Do not seal the
cabinet to the concrete pad as this prevents water from draining properly.
The conduit for power and signal enter through the open area in the bottom of the
cabinet.
Pole Mounting
Mount the cabinet using the pole-mount brackets. Make sure the brackets are secured
at all locations.
>45° >45°
Figure 4: Correctly Lifting the Display
Note: Lift plates are not removable.
Note: Daktronics is not responsible for mounting methods or the structural integrity of
support structures provided by others.

Electrical Installation
7
4 Electrical Installation
Getting Started
Daktronics recommends that a separate circuit be run to the electronic display(s) to
isolate it and prevent any issues that could be caused by line voltage uctuations or
high frequency noise on the power line caused by other types of equipment. A separate
circuit also makes display maintenance and troubleshooting easier. Daktronics assumes
no liability for any issues caused by line voltage uctuations or other improper power
conditions if these recommendations are not followed.
Power Installation
Qualied personnel must perform electrical installations to prevent injury to personnel
and damage to the equipment.
Grounding
All components of a display system—including but not limited to displays, control
equipment, and connected peripheral equipment—must be electrically grounded.
Only qualied individuals may perform electrical work, including verication of ground
resistance. Daktronics is not responsible for improper grounding or damage incurred as a
result of improper grounding.
Grounding methods must meet the provisions of all applicable local and national codes.
Inspect and verify all grounding methods meet the provisions of all applicable local and
national codes.
Proper grounding is necessary for reliable equipment operation and general electrical
safety. Failure to properly ground the display system may void the warranty, disrupt
operation, damage equipment, and cause bodily harm or death.
Power
For installation with ground and neutral conductors provided, the power cable must
contain an isolated earth-ground conductor. Do not connect neutral to ground at the
disconnect or at the display; this violates electrical codes and voids the warranty. Use a
disconnect so all hot lines and neutral can be disconnected.
Bonding Screw
A bonding screw is included (not installed) with the panelboard. If the bonding screw is
required, install it to avoid violation of local and national codes.
Power Connections
Power enters the trafc cabinet and terminates at the trafc cabinet panelboard.
Route power and signal cables from the trafc cabinet to the display in conduit
approved by local and national codes. Terminate all wires as labeled in the termination
panels.
Trafc Cabinet Termination
The trafc cabinet operates on 120/240 VAC 3-wire plus ground, single-phase power.
Utility power routes through the open area in the bottom of the cabinet. Terminate
the AC power at the panelboard. The power cable must contain an earth-ground
conductor.

Electrical Installation
8
To make AC power connections at a trafc cabinet:
1. Remove the panelboard cover to reveal the lugs.
2. Route the power cables through the bushing and into the panelboard.
3. Terminate each hot wire at L1 and L2, neutral wire at neutral ground bar lug, and
ground wire to the ground bus bar in the panelboard.
Display Termination
Each display operates on 24 VDC power. Power and signal wires enter through the
conduit hub in rear of the display. Power wires terminate at the terminal blocks. The signal
wires terminate at the VCB. Terminate all wires as labeled on the termination panels.
Conduit Sealing
Fill the ends of conduits entering the display with duct seal.
Module Connection
4-pin connectors make the low voltage power connections within the display. Power for
each module is provided with the use of one red and one black wire. Power connections
are completed at the factory.
Fans and Power Supplies Connection
The fans and power supplies use 120 VAC from the panelboard. The surge suppressor in
the panelboard protects the power supplies and modules from damaging power surges.
Trafc Cabinet
Individually wire the following items directly to the earth-ground rod with an 8 AWG or
larger wire according to local and national codes.
• Earth-ground lug mounted on the rear of the panelboard
• Conduit grounding collars
• Earth-ground connection inside the panelboard
Earth-ground rods must be installed and connected per local and national codes.
1. Connect the auxiliary power connection to the panelboard.
2. Connect the neutral power wire to the neutral bus.
3. Connect the hot wires from the terminals to the panelboard lugs.
Note: The terminal blocks on the DC breaker rail are wired differently, depending on
wire gauge.

Electrical Installation
9
Vanguard® Control Board Address Setting
The rotary switches set the sign address, which the software uses to identify the particular
display. When replacing a VCB (refer to Figure 5), set the rotary switches on the new VCB
to the same address conguration as the defective VCB. Each VCB in a network needs a
unique address.
Set the switch by rotating it clockwise or counter-clockwise until the arrow points to the
desired number; refer to Figure 6. Only 0 through 7 are viable addresses.
Vanguard® Field Controller and
First Time Fire Up
After installing the display and DMS site equipment, test the site according to the eld
test procedure. This ensures all equipment is installed properly and is operational. If a eld
test procedure is not available, call Daktronics Transportation Customer Service to obtain
a copy.
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 5: Vanguard®Control Board
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 6: VCB Rotary Switch

Maintenance and Troubleshooting
10
5 Maintenance and Troubleshooting
Getting Started
1. Disconnect power before performing any repair or maintenance to the
displays.
2. Only qualied service personnel should access internal display electronics. Contact
Daktronics Customer Service for training needs.
3. Daktronics engineering staff must approve changes made to the displays. If making
modications, submit detailed drawings to the Daktronics engineering staff for
evaluation and approval or the warranty will be void.
Service and Diagnostics
The VX-2428 series DMS are front accessible—all internal components are accessible from
within the display.
The following tools are required to service the display:
• Hex-head wrench (5/16")
• Stubby Phillips screwdriver
• Small Phillips screwdriver
• Small at-head screwdriver
• Small pliers
• Medium Phillips screwdriver
• Medium at-head screwdriver
• Nut driver (3/8")
• Cable ties
• Multimeter
• Clamp-on ground meter
Module Numbering System
Daktronics uses a module numbering
system to help with troubleshooting; refer to
Figure 7.
Figure 7: Module Numbering

Maintenance and Troubleshooting
11
7-Segment Error Codes
A 7-segment indicator appears on the following components; refer
to Figure 8. The 7-segment indicator provides codes to indicate any
present errors and their cause. When an error occurs, the 7-segment
will ash the error code. If multiple errors are present, the 7-segment
will ash the errors individually in succession. If no errors are present, the
7-segment will show a continuously looping gure-8.
Modules
7-Segment Error Code Error Cause
1Communications Lost No CAN packets received for
a default of 10 seconds
2 Failed Pixel
Refer to the table in the
Troubleshooting (p.19)
section.
3 Power Failure
Input Voltage has dropped
below the recommended
voltage
4 Invalid address error No valid address read from
the address/signal harness
5 MDF error Missing or corrupt module
denition le in rmware
6 ORDF error
Missing or corrupt output
routine denition le in
rmware
7 LPF error Missing or corrupt LED prole
le in rmware
8 (solid) White point error Missing or corrupt LED currents
or white point settings
8 (looping) No Error
VCB
7- Segment Error Code Error Cause
1Communications Lost No ber packets for 15
seconds.
3 Power Failure
Board voltages below limit:
V-ln, 1 and 2 < 20 VDC
9 V < 8.52 VDC
3.3 V < 3 VDC
2.5 V < 2.37 VDC
1.2 V < 1.1 VDC
8 (looping) No Error
Figure 8: 7-Segment

Maintenance and Troubleshooting
12
Isolation Board
7-Segment Error Code Error Cause
1Communications Lost No CAN packets for 10
seconds
2 Input power failure V-In < 21 VDC
5 Output power failure V-In < 21 VDC (with V-ln OK)
8 (looping) No Error
Vanguard® Field Controller Replacement
1. Turn off the power switch on the Vanguard® Field Controller face.
2. Label and remove all of the connections from the front and rear of the Vanguard®
Field Controller.
3. Remove the screws securing the Vanguard® Field Controller to the inside of the
display or the trafc cabinet and remove the controller.
4. Perform the needed maintenance.
5. When the Vanguard® Field Controller is ready for installation, slide it back into place.
6. Hold the controller in place and install the mounting screws.
7. Reconnect all connectors removed from the Vanguard® Field Controller.
8. Secure any retaining screws and prepare the Vanguard® Field Controller for
operation.
Module Replacement
1. Turn off power to the failed module by turning off the breakers for all power supplies.
2. Remove the wire connections:
a. Press the locking tabs of the 4-pin power connector and remove the connector.
b. Press the tabs of the 20-pin signal connector and remove the connector.
3. Carefully unlatch the nine plastic wingnuts holding the module in place.
4. Remove the module from the display face.
5. Align the new module with the nine studs and slide it into place.
6. Attach the nine plastic wingnuts removed in Step 3.
Caution: Modules are not hot swap components. Always turn off power to the
modules prior to servicing.
Note: If a wingnut is lost or damaged, replace it with only plastic wingnuts. Do not
use metal wingnuts.

Maintenance and Troubleshooting
13
7. Plug the 4-pin power connector and 20-pin signal connector into the new module.
8. Reapply power to the power supplies turned off in Step 1.
9. Test the modules:
a. Display the moving row, moving column, and all on/all off test messages. Run
the test messages at both 10% and 100% brightness settings. Watch for proper
operation of the LED module during each test message.
b. Perform a pixel test and check that all pixels operate correctly.
VCB Maintenance
To replace VCB (PC1):
1. Turn off the circuit breakers in the trafc cabinet powering the display.
2. Remove all connections to the VCB, including incoming signal from the Vanguard®
Field Controller and outgoing signal to the modules and sensors.
3. Remove the screws holding the board in place, and carefully remove the failed VCB.
4. Position the new board in the enclosure and secure with the screws removed in
Step 3. Securely fasten the screws to ensure proper grounding.
5. Reconnect all connections removed in Step 2.
6. Restore power.
7. Verify the address on the new isolation board matches the address on the existing
isolation board.
Environmental Sensor
To remove the environmental (light / temperature ) sensor:
1. Locate the failed sensor reported by the controller.
2. Disconnect the terminal block from the sensor.
3. Remove the two Phillips screws fastening the sensor to the mounting plate.
4. Verify the address on the new isolation board matches the address on the existing
isolation board.
To replace the sensor, repeat the above steps in reverse order.
Fan and Filter Maintenance
Each time an intake fan assembly is opened, perform the following:
• Check the fan blades for dirt and debris. Clean the fan blades to maintain the fan’s
efciency and to ensure proper cooling. If the fan blades have a large accumulation
of dirt and debris, change the lters more often.
• Spin the fan blades with a pen or pencil to ensure the bearings are free and the fan is
balanced.
• Test the fan by pressing the override button on the thermostat.
Note: The connectors only t together one way; do not force the connection.

Maintenance and Troubleshooting
14
• Check the lters every year. Clean the lters with water and a mild detergent, such as
dish soap.
• Compressed air can be used to clean the lter provided the nozzle is held at least
6" away from the lter, the pressure is no greater than 60 psi, and the air is blown
through the lter opposite the air ow direction as indicated by the arrow stamped
on the lter frame. Do not use compressed air inside the sign to avoid additional
debris in the display cabinet.
Filter Replacement
1. Turn off the intake fan breaker.
2. Loosen the 1/4-turn fasteners in the upper corners of the intake fan assembly panel.
3. Rotate the intake assembly forward and slide the lter out.
4. Slide a new lter into the panel.
5. Rotate the fan assembly back into its original position and tighten the 1/4-turn
fasteners.
Fan Replacement
1. Unplug the fan cord and cut the cable ties.
2. Remove the hardware holding the fan and nger guard in place.
3. Remove the failed ventilation fan.
4. To replace the ventilation intake fan, follow the previous steps in reverse order. Ensure
the fan is properly oriented. Verify air ow direction.
Trafc Cabinet Maintenance
Power Supply Assembly Replacement
Power supply assemblies are mounted in the trafc cabinet.
1. Turn off power to the power supplies by turning off the breaker in the distribution
panel.
2. Locate the failed power supply reported by the Vanguard® Field Controller.
3. Note the location and orientation of the plugs connected to the isolation board on
the failed power supply. Disconnect the plugs going into the isolation board.
4. Verify the address on the new isolation board matches the address on the existing
isolation board.
5. Loosen the screws securing the power supply, and gently lift the power supply and
mounting plate out of the trafc cabinet.
6. Loosen the screws securing the power supply to the plate, and gently lift the faulty
power supply off the plate.
To replace the new power supply, repeat the above steps in reverse order.
Note: Filters are directional. The replacement lter must be aligned in the same
direction as the existing one.

Maintenance and Troubleshooting
15
Trafc Cabinet Fan and Thermostat Assembly Replacement
1. Open the panelboard and turn off the circuit breaker supplying power to the fan and
thermostat assembly.
2. Disconnect the fan’s power cord.
3. Remove the hardware securing the nger guard and fan to the assembly bracket
and remove the fan.
4. Attach the new fan to the bracket and secure it using the hardware removed in
Step 3. Note the air ow orientation when attaching the new fan.
5. Reconnect power to the fan.
Trafc Cabinet Light Replacement
1. Turn off the circuit breaker that powers the light.
2. Unclip the lamp assembly.
3. Insert a new lamp into the assembly and replace the cover.
4. Restore power and test the light.
Display Maintenance
The following service intervals are recommendations. Contact Daktronics for
recommendations based upon location-specic conditions.
Structure
At least once per year:
• Inspect the mounting structure for corrosion, loose bolts, and overall stability.
• Check the connections of the earth ground wires, if accessible.
Earth Ground Resistance
At least once per year ensure earth ground readings meet local and national codes.
Display Cabinet
At least once per year:
• Check for water stains and other signs of water intrusion in the display cabinet.
• Seal any leaks that have developed with a silicone sealant or another suitable sealer.
• Repair any door gaskets that have tears or missing pieces.
• Check the drainage holes in the bottom of the cabinet for obstructions.
• Remove any debris that has collected in the display cabinet.
Temperature and Light Sensors
At least once per year:
• Clear away any obstructions to air ow around the temperature and light sensors.
• Clean the windows if they are dirty.

Maintenance and Troubleshooting
16
Ventilation Fans
At least once per year:
• Verify all fans work by pushing the test button until the fans turn on.
• Open the intake fan assembly and clean any dirt and debris off the fan blades. Spin
the fan blades with a pen or pencil to ensure the bearings are free and the fan is
balanced.
Filters
Check and clean the lters at least once per year. If the lter has an excess of dirt and
dust, check the lters more frequently.
Vanguard®Field Controller
At least once per year:
• Ensure all connectors are secure and the cables are not damaged in any way.
• Check the Vanguard® Field Controller operation.
Face Panels
Clean the face panels as needed, using one of the following methods.
Wet Outdoor Cleaning Method
Cleaning supplies:
• Water
• 5-gal bucket
• Automotive detergent
• 4' to 8' telescoping, soft automotive brush with bristles that are light to medium in
rigidity
• Several soft terry cloth towels
Cleaning process:
1. Mix the automotive detergent and cold water in the 5-gal bucket at 1 oz detergent
to 1 gal of cold water. Distilled water is preferred, but not required.
2. Dip the brush in the bucket of soapy water.
3. Using brush strokes, wash the display from top to bottom.
4. Thoroughly rinse the display face with cold water under low pressure.
5. Use a soft, dry terry cloth to dry and remove any excess water.
Note: Using a soap-dispensing brush with a low soap-to-water ratio eliminates
excess soap residue.