Page 2 4QD series controller instructions.
3 Contents
1 Foreword 1
2 Introduction 1
3 Contents 2
4 Dos and Don’ts 2
5 Specifications 3
6 Features 4
7 Controls 5
8 Adjustments 6
Gain
Ramps
¶ Current
¶ Reverse Acceptance Threshold
¶ Reverse Speed
9 Wiring 7
10 Power connections 8
Battery & motor wire size
Battery wiring
¶ Reverse polarity protection
¶ Circuit breaker or fuse.
Motor wiring
Motor polarity
Using several motors
11 Control wiring 10
Pre-wired models
Connectors
6 way connector
4 way connector
3 way connector
12 Wiring - various 11
Ignition switch
Ignition light
Speed control pot
¶ Top Speed adjustment
High Pot lockout
Battery meter
Voltage Control
Wig-wag (Joystick)
Reverse switch
¶ Brake solenoid
¶ Inhibit input
Hand control box
13 Output current & Heatsink 14
14 Mounting & Earthing 13
15 Waterproofing 15
16 Battery charging 15
17 Fuse 16
18 Fault finding 16
4 Dos and Don’ts
Do
Set up the gain, accel and decel presets to suit your battery voltage and requirements. Page 6.
Keep the controller covered at all times- or water, dust and dirt will enter.
Fit reverse polarity protection - this is also an emergency power disconnect so is necessary for safety.
Make sure terminal nuts are tight - current through a loose connection will burn it.
Keep the motor in good condition. Damaged brushgear and commutators can blow the controller.
Fit a motor suppression capacitor. A 10n ceramic across the motor brushes, as close to the motor as
possible, can greatly increase system reliability.
Do not
Drill or otherwise modify the metal base - it’s impossible to keep metal swarf out of the controller. This
WILL blow the controller!
Test the controller without securing the top board in place: as a bare minimum, loosely insert the two
screws at the end away from the 6 way connector.
Connect the batteries with the ignition on. the ignition is also a reset switch if the controller trips for any
reason!
Make any soldered connection to the board. Such modification invalidates the guarantee!
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