Credo 900 Series User manual

INSTALLATION GUIDE
Electric Drums &
Hydraulic Disc or Drum
Please return to customer once install completed
Read instructions before installation
NZ: 3500KG GVM | AU: 4500KG GVM

2
AU Freephone 1300 538 598
E [e-mail]
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Index
Page 7
Page 5
Page 4
Page 6
Page 12/13
Page 14
Page 15
Page 10/11
Page 9
Page 8
Recoding In Cab Controller
Warranty - T&C - Maintenance
Serial Number Locations
Troubleshooting
Hydraulic Pre-Assembled Wiring Diagram (Serial: 900-4499)
Hydraulic Pre-Assembled Instructions (Serial: 900-4499)
Hydraulic Wiring Diagram (Serial: 900-4499)
Hydraulic Instructions (Serial: 900-4499)
Electric Wiring Diagram (Serial: 900-4499)
Electric Instructions (Serial: 900-4499)
Page 3 Orientation Guide
Note: Check serial number to find correct instructions
Note: This instruction Book is
for Credo units with a serial
number btween 900 - 4500

3
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Orientation Guide
SIDE
Direction of Travel
SIDE
Back can be up to
70 Degrees Up
Back can be up to
20 Degrees Down
20
o
70
o
OR
TOP
TOP
Direction of Travel
Must be mounted straight longitudinally, i.e. parallel to direction of travel
INCORRECT
CORRECT
90
o
FRONT
FRONT
Unit Must Be Level
Laterally
INCORRECT
CORRECT
90
o
Direction
of travel
Must be
mounted
straight
longitudinally,
i.e. parallel to
the direction of
travel
FRONT
FRONT
Unit Must Be Level
Laterally
INCORRECT
CORRECT
90o
Unit must be
level laterally
Direction of travel
Back can be up
to 70 degrees up
Back can be up to
20 degrees down

4
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Credo General Installation Instructions
(Applies to Serial # 900 - 4499)
Credo Electric Installation Instructions
Mount the brake controller according to the mounting orientation instructions on page 3.
Wire the brake controller according to the instructions on page 9.
It is important that trailers fitted with the Credo™ braking system are also fitted with 12/24 volt
LED lights, not voltage specific incandescent or LED lights.
Maximum of 2 tail lights and 4 marker lights to be connected to the unit.
If more are required please phone us for installation support.
Controller must be mounted to a metal surface which is mounted to the main chassis.
The controller is capable of running trailers with up to 4 wheels braked with
electric drum brakes.
The earth from the trailer brakes and the trailer battery must only connect to the brake
controller output earths as shown in the diagram. They cannot be connected to a common
chassis earth.
Cable gauge should be suicient size to avoid voltage drop. For electric drum brakes a
minimum of 15 amp cable should be used and a separate feed should be run per two wheels
that are fitted with brakes.
Magnet wires can be used interchangeably, for brakes positive and earth.

5
NZ Freephone 0800 487 245
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Credo General Installation Instructions
(Applies to Serial # 900 - 4499)
Connect one grey to each side
of the breakaway switch
Green - Right Indicator
Brown - Tail light
White - Earth
Red - Stop light
Yellow - Left Indicator
Connect trailer lights to
5 core output
One 5 Amp/hr battery
must be fitted with the
battery supplied.
Do not use brake system battery
to power any other systems.
There should be no more
than 2.5 metres of cable
between the controller and
the trailer plug to avoid
voltage drop.
Pink not used
May also be
green/yellow
Battery Requirements:
Electric: 1x5Ah or bigger
Hydraulic: 2x5Ah or 1x12Ah
or bigger
30 amp blade fuse
required on orange wire
Must only be used for
credo connection
Elecrtic Drum magnet
wires are interchangeable
Electric Drum
White to Magnet
Blue to Magnet
Orange Not Used
Wiring diagram below applies to CredoTM
Brake Controller with electric drums only.
Credo Electric Drum Wiring Diagram
Applies to units in serial
range 900 - 4499
All unused wires must be isolated.

6
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Credo Hydraulic Installation Instructions
The earth from the BrakeRite actuator and the trailer battery must only connect to the brake
controller output earths as shown in the diagram. They cannot be connected to a common
chassis earth.
Cable gauge should be of suicient size to avoid voltage drop. The main power feeds to the
actuator from the brake controller should be minimum 20amp.
Mount the actuator in a protected position. Orientation is not important for this, but filler caps
should be level and upright.
Do not run the actuator without fluid as this will damage the pump.
Use new DOT 3 or DOT 4 brake fluid.
Bleed the brakes by activating the breakaway switch. However, do not run the actuator
continuously for more than 1 minute every 5 minutes. All air must be removed from the system
for the brakes to work correctly. Ensure that the fluid level does not drop below 20mm from the
filler cap opening to avoid more air being pumped into the system.
Credo General Installation Instructions
Credo Hydraulic Instructions
(Applies to Serial # 900-4499)
Mount the brake controller according to the mounting orientation instructions on page 11.
Wire the brake controller according to the instructions on page 11.
It is important that trailers fitted with the Credo™ braking system are also fitted with 12/24 volt
LED lights, not voltage specific incandescent or LED lights.
Maximum of 2 tail lights and 4 marker lights to be connected to the unit. If more are required
please phone us for installation support.
Controller must be mounted to a metal surface which is mounted to the main chassis.

7
NZ Freephone 0800 487 245
E [e-mail]
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All unused wires must be isolated.
Credo Hydraulic Disc / Drum Wiring Diagram
Wiring diagram below applies to CredoTM
Brake Controller with hydraulic brakes only.
Actuator must have Trailparts™ isolator fitted.
Connect one grey to each side
of the breakaway switch
Green - Right Indicator
Brown - Tail light
White - Earth
Red - Stop light
Yellow - Left Indicator
Connect trailer lights to
5 core output
One 5 Amp/hr battery
must be fitted with the
battery supplied.
Do not use brake system battery
to power any other systems.
There should be no more
than 2.5 metres of cable
between the controller and
the trailer plug to avoid
voltage drop.
Battery Requirements:
Electric: 1x5Ah or bigger
Hydraulic: 2x5Ah or 1x12Ah
or bigger
30 amp blade fuse
required on orange wire
Must only be used for
credo connection
White to Pump
Blue to Pump
Orange Not Used
Pink to Brown
Hydraulic Pump
Credo Hydraulic Instructions
(Applies to Serial # 900-4499)
Applies to units in serial
range 900 - 4499

8
AU Freephone 1300 538 598
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Credo Pre-assembled Hydraulic Installation
Instructions
Do not run the actuator without fluid as this will damage the pump.
Use new DOT 3 or DOT 4 brake fluid.
Bleed the brakes by activating the breakaway switch. However, do not run the actuator
continuously for more than 1 minute every 5 minutes. All air must be removed from the system
for the brakes to work correctly. Ensure that the fluid level does not drop below 20mm from the
filler cap opening to avoid more air being pumped into the system.
The multi core cable marked "7 pin plug" must be wired directly to the trailer plug, and it is
important that the earth wire from that cable must only be earthed using the trailer plug earth
pin, i.e. it cannot be connected to a common chassis earth.
The twin core cable joins to the breakaway switch cables.
Connect the cable marked "trailer lights" from the on-trailer module to the trailer tail camp
circuit. DO NOT bypass this directly to the trailer plug.
The on-trailer module assembly can be mounted o centre side to side, but MUST BE, A)
parallel with the front-rear centre line of the trailer, and B) mounted level on the trailer in its
loaded state.
Credo Hydraulic Pre-assembled Instructions
(Applies to Serial # 900-4499)
Mount the on-trailer module according to the mounting orientation instructions on page 3.
Wire the on-trailer module according to the instructions on page 7.
It is important that trailers fitted with the Credo™ braking system are also fitted with 12/24 volt
LED lights, not voltage specific incandescent or LED lights.
Maximum of 2 tail lights and 4 marker lights to be connected to the unit. If more are required
please phone us for installation support.

9
NZ Freephone 0800 487 245
E [e-mail]
www.trailparts.co.nz
Credo Hydraulic Pre-assembled Instructions
(Applies to Serial # 900-4499)
FRONT
REAR
Wiring diagram above applies to Credo™ pre-assembled
Brake Controller with hydraulic brakes only.
Credo Hydraulic Pre-assembled Wiring Diagram
Connect front wire tails to trailer
7 pin plug
Connect wire tails from rear to
trailer tail-lamps
Connect brake line to brake
actuator port
Connect 2-core cable to
breakaway switch
Green - Right Indicator
Brown - Tail Light
White - Earth
Red - Stop Light
Yellow - Left Indicator
Applies to units in serial
range 900 - 4499
All unused wires must be isolated.
Actuator must have Trailparts™ isolator fitted.

10
AU Freephone 1300 538 598
E [e-mail]
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Troubleshooting
Fault Possible Causes Repairs/Checks
In-cab controller shows
‘Low Trailer Battery’
warning (old style In-cab
Controller shows Eb Error)
Or
No tail lights / tail lights
go out when brakes are
applied.
In-cab controller shows
‘Please Drive with Your
Headlights On’ message,
even though the headlights
are on
(old style In-cab shows Ec
Error).
Battery is excessively
discharged.
Bad connection between
trailer mounted brake
controller and battery.
Blown battery fuse.
Poor connection on battery
terminals.
Serial number mismatch
between Controller and
Trailer.
Faulty trailer plug
In-cab controller cannot
communicate with the
trailer mounted controller
due to interference
Incorrect wiring by-passes
controller.
Poor connection on battery
terminals.
Check battery is over 12.5V when
disconnected. If lower replace the
battery.
Check if battery is charging by
disconnecting the battery leads,
connect to vehicle and switch
lights on. Then check for 14V on
the end of the battery leads. A
measurement of 14V means the
charger is working – if no voltage
then a replacement or repaired
controller is required.
Check leads, fuse holder and any
connections between the battery
and controller for
poor / corroded connections. Any
high resistance joins will cause
excessive voltage drop to the
controller under braking resulting
in the ‘Low Battery’ error.
Obtain serial number: Refer to
page 19
If they do not match then follow
instructions on page 16/17.
Check trailer plug pins are not
corroded or crushed in, and either
spread the pins, remove corrosion
or replace the plug.
Check the controller to In-cab
connection by taking the in-cab
unit back to beside the trailer
mounted controller, if still error is
still present controller needs to be
replaced or repaired.
Check the vehicle connection
goes to only the trailer mounted
controller and all tail and marker
lights from the controller lights
output.

11
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E [e-mail]
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Fault Possible Causes Repairs/Checks
Brakes randomly come on
and lock up.
Braking output on In-cab
controller stays at ‘-‘ on the
screen when brakes are
applied.
In-cab Controller shows ‘0’
or higher numbers when
brakes applied but no
braking happens.
Faulty Break-away switch.
Faulty Break-away wiring.
In-cab controller has
‘emergency stop’ button
pressed.
Faulty trailer plug / vehicle
connection.
Incorrect wiring bypasses
controller.
On electric drums – Faulty
wiring or magnets.
On hydraulic actuator driven
brakes – Faulty wiring or
isolator if fitted
Check breakaway switch and
wiring for a short circuit. Replace
any faulty components or wiring.
Make sure In-cab controller is
securely mounted on vent holder
and emergency stop button not
inadvertently pressed.
Check and repair trailer plug and
vehicle socket and associated
wiring – replace any faulty parts.
Check vehicle connection goes
directly to the controller and does
not bypass the controller.
On electrics check wiring
and drum magnets for faulty
connections. Normal magnet
resistance is 5 Ohms. 2 Magnets
together is 2.5Ohms and 4 is 1.25
Ohms.
On Hydraulic the Blue signal wire
should be checked for voltage
when the emergency stop being
is pressed. If there is some voltage
and there is no brakes then call for
assistance.

12
AU Freephone 1300 538 598
E [e-mail]
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-
-
EMERGENCY
STOP
LESS MORE ADJ.
+
GAIN SENS.
ZzP
Recoding of Touch-Screen In-cab Controller
1Power up In-cab controller on the USB
cable and leave plugged in for the
duration of coding the controller.
2Wait till the screen displays the gain and
sensitivity control buttons.
3Press and hold the battery symbol for 5
seconds ignoring the screen flashing
any messages.
4The In-cab controller will do a single
beep and display 2 buttons ‘SET’ and
‘ESC’, and a 4 digit number. This number
is the number serial number of the
matching trailer mounted controller.
5Change the number by tapping each
digit to increment the digit by one.
To reach 0 increment the digit till it
reaches 9 and then the next tap brings
it back to 0. (Tip: tap lower on the
numbers to avoid bumping ESC or
SET).
-
-
EMERGENCY
STOP
LESS MORE ADJ.
+
GAIN SENS.
ZzP
1000
EMERGENCY
STOP
SET
ZzP
ESC
Refer to step 4
Refer to step 3
Refer to step 2

13
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6Once you have the serial number of
your trailer mounted controller showing
press ‘SET’ to lock the In-cab controller
to that serial number.
7The In-cab controller will after a pause
emit 3 beeps and return to the normal
operation screen.
8Connect the trailer to vehicle and turn
on the headlights – check the head light
symbol loses the red cross to prove it is
connected to the trailer and functioning
as normal.
9If red cross doesn't go away, unplug
In-cab controller and select immediate
sleep if this screen appears.
Leave unplugged for approx 5 seconds.
Plug in the In-cab controller and if the
serial number on the fourth start up
screen does not match the number on
the trailer, start recoding process again.
-
-
EMERGENCY
STOP
LESS MORE ADJ.
+
GAIN SENS.
ZzP
4350
EMERGENCY
STOP
SET
ZzP
ESC
4352
EMERGENCY
STOP
SET
ZzP
ESC
Fourth start up screen Refer to step 8
Refer to step 6
Refer to step 5
VERSION 1.9
SERIAL 1000
EMERGENCY
STOP
ZzP

14
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Warranty Terms and Conditions
LIMITED EIGHTEEN MONTH WARRANTY CONDITIONS
Trailequip Ltd warrants that the mechanical and
electrical components of the TRAILPARTS/CREDO
products as listed below will be free of defects in
material and workmanship for a period of eighteen
months from the original date of purchase.
Whilst we take every eort to ensure compatibility
with all known vehicles we cannot guarantee 100%
compatibility for all vehicles.
To obtain any warranty service, you must provide
Trailequip Ltd with proof of purchase, such as a copy of
your tax invoice or purchase receipt, which will include
a purchase date and the serial number of your product.
This warranty does not cover the removal or re-fitting
of the product.
TRAILPARTS/CREDO will, at its discretion, repair,
replace or refund the purchase price of a defective
product or component, provided you return the
defective product or component during the warranty
period, freight charges prepaid, to Trailequip Ltd or to
an authorized TRAILPARTS/CREDO dealer or stockist.
Attach your name, address, email address, telephone
number, a description of the problem, and a copy of
the tax invoice or purchase receipt listing the date of
purchase and the TRAILPARTS/CREDO serial number
of the defective product.
This warranty does not apply if the product has been
damaged by misuse, overloading, impact, modification,
improper installation. This warranty is void if any
TRAILPARTS/CREDO serial number has been removed,
altered, or defaced.
Please contact the below for
warranty service or support:
TRAILPARTS/CREDO
C/ Trailequip Ltd
2 Tuna Street
Dargaville 0310
New Zealand
International Phone: [phone]
Australia Phone: [phone]
Check battery is keeping well charged. A well charged battery should be at or above 13 volts.
This is particularly important if the trailer is left parked for extended periods of time. If the trailer
is not used for extended periods the battery should be removed every 2 months and charged to
ensure it does not become damaged. This can happen if the battery charge drops below
10.5 volts.
Check the trailer plug and vehicle socket to ensure they are not damaged and they give a
sound electrical connection. An intermittent or faulty connection could mean the brakes do not
function correctly.
If fitted with a hydraulic actuator make sure the fluid level remains suicient. The fluid should be
changed in line with general trailer service intervals.
If fitted with electric drums make sure they are kept properly adjusted and that the magnets and
linings are not excessively worn and are replaced in line with general trailer service intervals.
Maintenance and checks

15
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E [e-mail]
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Incab Controller:
For serial numbers 1-2700 the serial number is located on the grey base of the controller or at the
bottom of the black plate on the back if it is a touch screen controller.
Serial numbers 2701- when the touch screen controller is first connected to power the serial number
is shown on the 4th screen that displays on start up.
Trailer Mount Controller:
Either engraved/stamped into the alloy base plate or etched into the front face of the trailer
mount controller.
Serial Number Locations

AU Freephone 1300 538 598
E [e-mail]
www.trailparts.com.au
NZ Freephone 0800 487 245
E [e-mail]
www.trailparts.co.nz