Hunter ACC2 User manual

ACC2 Decoder
BUILT TO COMMAND
EVEN THE LARGEST PROJECTS
Quick Start Guide

2hunter.direct/ACC2help
POWERFUL. INTELLIGENT. FLEXIBLE.
THE ACC2 CONTROLLER DELIVERS ADVANCED WATER MANAGEMENT
TO MEET THE DEMANDS OF LARGE-SCALE COMMERCIAL PROJECTS.
TABLE OF CONTENTS
ACC2 Decoders................................................... 4
Important Connections and Tips.................. 4
Facepack............................................................... 4
Reversing the Facepack .................................... 4
Connecting and Disconnecting the Facepack .5
SyncPort™ Connection ......................................5
SD Card Reader ...................................................5
Battery..................................................................5
External Components......................................... 6
Front Door........................................................... 6
Face Frame.......................................................... 6
Facepack.............................................................. 6
Face Frame Latch ............................................... 6
Facepack Cable................................................... 6
Spare Decoder Fuses and Tool ......................... 6
Spare Fuse Holders............................................ 6
Wall Mount Bracket ........................................... 6
Wire Ties for Strain Relief.................................. 6
Internal Components.......................................... 6
PCU Board........................................................... 6
Slide Lock ............................................................ 6
Output Module Slots ......................................... 6
Flow Expansion Slot........................................... 6
Earth Ground Lug............................................... 6
Transformer Assembly...................................... 6
Wiring Compartment Cover ............................. 6
Power Supply Board .......................................... 6
Flow Sensor Inputs............................................. 6
Status Light......................................................... 6
Programming Port............................................. 6
Decoder Output Module Lights ....................... 8
Wire Ties.............................................................. 8
Transformer Fuse............................................... 8
Flow Expansion Module .................................... 8
Field Wiring.......................................................... 9
Operating the Controls...................................10
Attention Messages ........................................10
Start-Up Screen..................................................10
View Messages....................................................11
Clear Messages ...................................................11
View Logs .............................................................11
Home and Activity Screens............................11
Activity Screen.................................................... 12
Basic Programming and Setup.................... 13
Names.................................................................. 13
hunter.direct/acc2 1-800-733-2823
Troubleshooting
Need more helpful information on your product? Find tips on installation,
controller programming, and more.

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Settings, Time/Date ......................................... 13
Pump/Master Valve Setup...............................14
Manual Starts and Test ..................................... 15
Stop Commands ................................................. 15
Programs.............................................................16
Start Times.........................................................16
Intelligent Current Sensing............................ 17
Run Times .......................................................... 17
Water Days ........................................................18
Seasonal Adjust.................................................18
Program Rules................................................... 19
Ignore Calendar Days O ...............................19
No Water Window (Start and End)................19
Station Delay (Delay Between Stations) ......19
Calendar Days O.............................................. 19
Program Summary ...........................................19
P/MV Operation (Pump/Master Valve
Operation) .......................................................... 20
Sensors ............................................................... 20
Clik Sensors....................................................... 20
Sensor Response............................................... 21
Solar Sync........................................................ 22
Flow Sensors..................................................... 22
Stations Menu .................................................. 23
Station Setup ..................................................... 23
Cycle & Soak ....................................................... 24
Blocks.................................................................. 24
Station Limits..................................................... 25
Station Summary .............................................. 25
Devices Menu ................................................... 26
P/MV Operation................................................ 26
Flow Sensors...................................................... 26
Solar Sync......................................................... 26
Clik Sensors........................................................ 26
Sensor Response............................................... 26
Flow Menu ......................................................... 27
Clear Flow Alarms ............................................. 27
Settings Menu ................................................. 27
Time/Date ......................................................... 27
Regional Settings.............................................. 27
User Management ............................................ 28
Networking ....................................................... 28
Diagnostics Menu............................................ 29
View Logs ........................................................... 29
Alarm Logs........................................................ 29
Controller Logs ................................................ 29
Station Logs ...................................................... 30
Filter Logs.......................................................... 30
Export Logs....................................................... 30
Module Info........................................................ 30
Clik Sensor Diagnostics ................................... 30
Station-P/MV Diagnostics............................... 31
Flow Sensor Diagnostics .................................. 31
Solar Sync Diagnostics ..................................... 31
Decoder Diagnostics......................................... 31
Advanced Features ......................................... 32
Export Logs........................................................ 32
Easy Retrieve ..................................................... 32
Reset Memory ................................................... 33
Firmware Update .............................................. 33
Conditional Response....................................... 33
Flow Operations............................................... 34
Flow Manager.................................................... 34
Flow Monitor...................................................... 34
MainSafe™ ........................................................ 34
Set Up Flow Monitor ......................................... 35
Flow Zones ........................................................ 35
Flow Map ......................................................... 35
Flow Limits ...................................................... 36
Flow Allowances ............................................. 36
Station Setup.................................................... 37
Station P/MV Usage ...................................... 37
Flow Zone ........................................................ 37
Flow Priority.................................................... 37
Flow Measurement Settings ........................ 37
Copy and Paste ............................................... 37
Learn Flow......................................................... 38
Schedule Flow Learning ................................ 38
Hydraulic Summary ......................................... 39
Flow Totals ........................................................ 39
View Flow ..........................................................40
Flow Alarm Handling ........................................40
Station-Level Alarms ........................................41
Flow Zone or MainSafe™ Alarms.....................41
Set Up Flow Manager ....................................... 42
Flow Zones ........................................................ 42
Flow Target...................................................... 42
Station Setup.................................................... 43
Flow Zone ........................................................ 43
Flow Priority...................................................... 43
Flow Rate......................................................... 43
Station Limits....................................................44
MainSafe™ .........................................................44
Setup Screen .................................................... 45
Flow Limits Screen........................................... 45
Maximum Flow ............................................... 45
Unscheduled Flow.......................................... 45
Alarm Delay..................................................... 45
Alarm Clear Delay........................................... 45
Allowances Screen...........................................46
Monthly Budget .............................................46
Manual Watering Allowance.........................46
Conditional Response .................................... 47
Set up a Conditional Response .......................48
Conditional Response Types...........................49
SOS (Status Output Station)........................... 50
Set up an SOS station .................................... 50
Start Stations, Programs, and Blocks............ 50
Mode................................................................ 50
Switch P/MVs .................................................... 51
Decoders Menu................................................ 52
Program Decoder.............................................. 52
Serial Number................................................... 52
Decoder Type.................................................... 52
Power Factor..................................................... 52
Inrush................................................................. 52
Output-Station ................................................. 52
Programming Station Decoders ................... 53
Programming Pump/Master Valve (PMV)
Decoders .......................................................... 53
Programming Sensor Decoders .................... 54
Programming Decoders via the Two-Wire
Path.................................................................... 54
View Conguration ........................................... 55
View Status ........................................................ 55
Decoder View.................................................... 55
Station Assignments ........................................ 56
Decoder Diagnostics......................................... 56
Station Finder ................................................... 56
Wire Test ........................................................... 57
Decoder Inventory ............................................ 57
Filter................................................................... 58
Comm %............................................................. 58
Update Available .............................................. 58
Export Inventory .............................................. 58
Refresh Inventory........................................... 58
Clear Inventory ................................................. 58
Update Decoders............................................... 58
Troubleshooting............................................... 59

4hunter.direct/ACC2help
Important Connections and Tips
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ACC2 Decoders
ACC2 Decoder is designed to operate
Hunter ICD decoders. The ICD decoders
must be programmed with station numbers
before they will operate. See the Decoder
menu for detailed instructions on decoder
programming.
ACC2 Decoder is very similar to the
conventionally wired ACC2 controller, with
an additional Decoder menu for all unique
decoder functions and diagnostics. Some
devices (Pump/Master Valves and sensors) may be assigned
to decoder locations, and those individual setup screens now
include this option.
Important Connections and Tips
FACEPACK
“Facepack” is a Hunter term for the enclosed, removable
control panel and display assembly. It contains the brain and
memory of the controller.
REVERSING THE FACEPACK
The ACC2 facepack and controls can be reversed in the door
frame, so they can be operated with the door open while
looking at the modules and wiring.
1. Pull the facepack away from the face frame. The facepack
is held in place by a magnet.
2. Pass the facepack through face frame.
3. Slide the facepack into the back side of the face frame
as shown.
4. Tilt the facepack into position; it will click into place and be
held securely by the magnet. Tuck the ribbon cable slack
into the provided pocket.
When the facepack detects that it is reversed, it will
automatically go to the Diagnostics, Module Info display. It
is possible to navigate to any other screen from this display,
including programming and manual operations.
The controller will water automatically with the
facepack in either position.

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Important Connections and Tips
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CONNECTING AND DISCONNECTING THE FACEPACK
The facepack cable connection is located just below the light
on the Power Supply Board. Turn power to controller o
before connecting or disconnecting the facepack.
SYNCPORT™ CONNECTION
The SyncPort connection is a proprietary Hunter connection
for external interface devices. It is located near the top of the
Power Supply Module.
SyncPort
Facepack Cable Connection
Do not attempt to connect the facepack cable to
this port. The connector has a protective cover
that should be le in place until the connection
is needed.
If power to the controller is le o for extended
periods, the battery will be consumed more quickly.
Consult the connecting device’s manual for additional
instructions regarding SyncPort.
SD CARD READER
The bottom edge of the facepack includes a built-in SD card
reader. The controller is supplied with an SD card.
The SD card can:
• Upload updated rmware (saved from email or the
hunterindustries.com website) to the controller and all
its modules.
• Store logs, Easy Retrieve backups, and other information
for use later or on another device. See the Advanced
Features menu on page 32.
BATTERY
The facepack has a replaceable internal lithium battery in the
side of the facepack to back up date and time settings during
power outages (Program settings and other data are non-
volatile and do not require battery backup). The battery may
last the life of the controller, but is easily replaced if necessary.
Use a standard CR2032 replacement if necessary. Be sure to
place the + side of the battery correctly.

6hunter.direct/ACC2help
Components
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EXTERNAL COMPONENTS
FRONT DOOR
FACE FRAME
FACEPACK
FACE FRAME LATCH
FACEPACK CABLE
SPARE DECODER FUSES AND TOOL
SPARE FUSE HOLDERS
WALL MOUNT BRACKET
WIRE TIES FOR STRAIN RELIEF
FACEPACK CABLE
The facepack cable connection is located beneath the
Status Light. It is a standard connector with a locking
lever on one side, which must be pressed in to remove the
cable.
SPARE DECODER FUSES AND TOOL
ACC2 Decoder is shipped with spare 20A automotive
fuses and a fuse pulling tool. These are only for use as
replacements in the decoder output modules, to enhance
surge protection on the eld wiring. Replacements can be
purchased at most automotive parts stores.
PCU BOARD
The replaceable PCU (Power Conditioning Unit) board
has only a single screw and can be replaced if necessary.
The board plugs directly into the back plane. This board
contains components that are used by all decoder output
modules, and the status LED indicates whether the board
has power and is operational.
SLIDE LOCK
The slide lock secures the decoder output modules in
place. When it is open, power is o to the facepack, and an
orange indicator is shown. The controller will not operate
if the slide lock is open, and the Status LED will ash
orange to indicate this condition.
EARTH GROUND LUG
A heavy-duty earth ground lug is provided for lightning
and surge protection. This connection is for equipment
safety only. It should always be connected with heavy
copper wire to approved grounding hardware buried in the
earth at least 8' (2.5 m) away from the controller, and as
far as possible away from the two-wire paths.
Generally, earth ground hardware consists of an 8'
(2.5 m) copper-clad steel rod driven all the way into earth,
or a 8' (2.5 m) x 4" (100 mm) wide copper plate, or both,
or comparable earth grounding hardware as approved by
local code.
Do not connect the primary AC power earth ground wire
to this lug. ACC2 provides safety ground connection inside
the transformer wiring compartment.
Decoder wire paths also require additional earth
grounding every 1,000' (300 m), or every 12 decoders, at
minimum. ICD decoders include built-in surge protection,
with a bare copper wire for connection to earth. In high-
lightning areas, ground more frequently.
Decoder earth ground should meet the same specication
as the controller ground: 8' (2.5 m) copper-clad steel rod
driven all the way into earth, or a 8' (2.5 m) x 4" (100 mm)
wide copper plate, located at right angles to the two-wire
path, at least 8' (2.5 m) away from the two-wire path.
INTERNAL COMPONENTS
PCU BOARD
SLIDE LOCK
OUTPUT MODULE SLOTS
FLOW EXPANSION SLOT
EARTH GROUND LUG
TRANSFORMER ASSEMBLY
WIRING COMPARTMENT COVER
POWER SUPPLY BOARD
FLOW SENSOR INPUTS
STATUS LIGHT
PROGRAMMING PORT

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Components
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POWER SUPPLY BOARD
The Power Supply Board, in the upper le corner of the
cabinet, is a vital component, and includes connections
for external sensors, Pump/Master Valve outputs,
Common wire connections, and more. The Power Supply
Board is also designed for convenient replacement, if
necessary. Three captive screws (#2 Phillips) secure the
board. Two modular wiring plugs connect the board to the
controller.
FLOW SENSOR INPUTS
Flow Sensor connections have DC voltage and polarity.
When connecting a DC ow meter, verify that the positive
lead from the sensor is connected to the red terminal, and
the negative sensor is connected to the black terminal.
There are three ow sensor inputs on the Power Supply
Board. The optional A2C-F3 ow expansion module
can add up to three more for a maximum of six ow
sensor inputs.
STATUS LIGHT
The Status Light is green to indicate power and correct
operation. If the light is orange, there is a problem.
Solid orange detects an issue within the Power Supply
Board itself.
Flashing orange indicates that one of the two slide locks
is open. The controller will not function unless both slide
locks are in the closed position.
PROGRAMMING PORT
The programming port is used to program station
numbers into the decoders. ICD decoders must be
programmed before they will operate. Reverse the
facepack for easiest operation, go to the Decoder menu,
and select Program a Decoder. Insert the red and blue
wires from the decoder (doesn’t matter which goes
where), and use the menu to select the station numbers
and program the decoder.

8hunter.direct/ACC2help
Decoder Wiring and Tips
DECODER OUTPUT MODULE LIGHTS
Each decoder output module is equipped with diagnostic LED
lights. Each light is labeled on the deck lid.
Symbol Activity Type Color and Meaning
Decoder fault
Blinking red:
Decoder has an over-current
or overload
Module or line
activity
Blinking green:
Station active
Blinking red:
Line overload (wire path short)
Also blinks during decoder
update
Communicating
Blinking green:
Two-wire communications
Blinking amber:
Programming port
communications
Solid amber:
Wire test mode
Line status
Blinking green:
Module damaged (replace)
Solid green:
Line is OK
O:
No power to module
WIRE TIES
Wire tie holders are molded into the lower back of the
wiring compartment to secure eld wiring with plastic zip
ties. This provides a strain relief to keep eld wires from
pulling downward on the modules, and keeps the inside
neat and organized.
Additional wire tie holders are provided near the Power
Supply Board for sensor and other connections.
TRANSFORMER FUSE
The transformer uses a replaceable 5 x 20 mm electrical fuse,
located next to the convenient on/o switch. Two spare fuses
are stored in the bottom rear of the facepack frame, under the
sticker labeled “Spare Fuse.”
Replacement fuses are a standard glass body 5 x 20 mm
250V, 2A fast blow, available online or from electronic
appliance retailers and hardware stores.
FLOW EXPANSION MODULE
A2C-F3 ow expansion modules add three additional
hardwired ow inputs to the controller. These modules
may only be added to the lower right module slot, one per
controller, and it is the only module that will t in this slot.
The ow expansion module has DC voltage and polarity,
and the + (or red) connection from the ow sensor must
be connected correctly to the + (positive) terminals on the
module. Finish ow expansion in the Devices, Flow Sensors
menu aer installing the module.
ACC2 Decoder controllers may also read up to six ow sensors
via the two-wire paths using ICD-SEN sensor decoders. The
controller may use any combination of hardwired inputs to
ow terminals, or connection by sensor decoders.

Built on Innovation®9
Decoder Wiring and Tips
FIELD WIRING
Proper installation and connection of the decoder two-wire
paths is very important.
• Use only Hunter IDWIRE or an approved substitute.
• Use only Hunter DBRY-6 waterproof connectors in the red
and blue two-wire path connections.
• Leave adequate slack (about 5' or 1.5 m) at each splice, to
prevent disconnection.
Each A2C-D75 output module supports up to 75 decoder
stations.
• Each module allows up to three two-wire path connections.
• Each path may be up to 10,000' (3 km) with 14 AWG
(2 mm2) wire, or up to 15,000' (4.5 km) with 12 AWG
(approximately 3.31 mm2) wire.
• Two-wire paths may be tee-spliced (in a valve box with
approved connectors), as long as the maximum distance to
each end of the paths from the controller does not exceed
the maximum for the wire used.
You can have more than 75 stations on a single two-wire path.
If more than one A2C-D75 is installed, it is possible to assign
the additional station numbers to another decoder output
module. This must be done with the Station Assignments
function on the Decoder menu, so the controller will know
which module has the additional stations.

10 hunter.direct/ACC2help
Operating the Controls
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Operating the Controls
ACC2 has a simple control panel with unique operating
features. The dial is used to rotate through selections, and
then pushed to select, or to enter information.
1. The dial is used to rotate through selections and then
pushed to select, or to enter information.
2. To the right of the LCD display are four so keys. Their
functions will change with each menu selection, as shown
in the ACC2 display.
3. Back always goes back up a level from the current menu
selection.
4. Home will always return you to the Home screen view.
Home screen shows the status of the controller, including
anything currently running in the eld. When in the Home
screen, the bottom so key is called Main Menu, and this
takes you to all programming and setup functions.
From the Main Menu button, you may enter the setup menus
for all ACC2 functions. Turn the dial to view the main menus,
and press the dial to select one of them. Then, the dial is used
to select the items within that menu. Press to select one.
Once you’ve entered a programming screen, the dial is used to
navigate through all the elds of information. Press to select
one, rotate to see the choices or enter numbers or letters, and
press to select.
Press Home at any time to return to the top level, or to
navigate to other functions.
Attention Messages
A new controller installation will begin with at least one or two
Attention messages, because the controller has experienced
a power outage during shipping, and may be discovering new
modules. This is normal.
STARTUP SCREEN
When power is rst turned on (either with the power switch,
or closing one of the slide locks), the Hunter logo screen
appears, and the controller begins searching for any irrigation
events it may have missed during a power outage.
This search can be canceled if you are installing or servicing
the controller by pressing the Home button on the facepack.
If the controller nishes searching for missed events (about
1 minute), it will resume irrigating where it should be at the
current time of day.
In automatic operations, the controller will always perform
the search aer any power outage. Watering that was missed
during the outage will be recorded in the logs, and the
watering will resume where it should be at the time of the
power restoration.