Technical Bulletin 259
Speed Reduction — Flexi AC Trucks
QD 290
27/07/17
Narrow Aisle
Flexi AC / AC1200
Overview
Summary
The maximum speed of Flexi AC trucks can be reduced by enabling a speed reduction input to the traction controller and adjusting the Cutback Speed 2 setting.
Notice
The 'tortoise' speed reduction symbol on the digital display will be permanently illuminated when this feature is enabled.
Enabling Speed Reduction Input
Fit a link between pins 1 & 2 on truck harness plug H, located below the spool valve controller.
Part #42603-00 — Pre-fitted link wire plug
Speed Calculator
Cutback Speed 2 Setting
60%
~7.8 km/h
Estimated max speed — AC1200 with typical load
Note
Actual speed varies by truck model, load weight and battery condition.
Zapi Console — Configuration Steps
ZAPI CONSOLE
1
Preparation
Keyswitch OFF. Disconnect digital display harness from traction controller plug F. Connect Zapi digital console.
2
Power On
Turn keyswitch ON. Display shows controller info — model, software version, voltage, current, hour count.
3
Access Main Menu
Press ENTER. Display shows "MAIN MENU — PARAMETER CHANGE".
4
Navigate to Cutback Speed
Press ENTER again. Press ROLL UP until display shows "CUTBACK SPEED 2" with current % (default 60%).
5
Adjust Setting
Press PARAM SET up or down to adjust in 10% increments. E.g. 40% gives ~8 km/h on AC1200.
6
Save
Press OUT. Confirm with ENTER when prompted "ARE YOU SURE? YES=ENTER NO=OUT".
7
Exit & Reconnect
Press OUT twice. Keyswitch OFF. Disconnect console, reconnect truck display harness to plug F.
Quick Reference
| Setting | Reduction | Est. Max Speed (AC1200) |
|---|---|---|
| 60% (default) | Slight | ~10–11 km/h |
| 50% | Moderate | ~9 km/h |
| 40% | Significant | ~8 km/h |
| 30% | Heavy | ~6–7 km/h |
Plug H
Below spool valve controller
Link pins 1 & 2
Enables speed reduction
Plug F
Traction controller
Digital display / console
Disconnect for programming
Part #42603-00
Pre-fitted link plug
Narrow Aisle supply
Speed reduction enable
Documentation Required
Inform Narrow Aisle Design department in writing of any modified settings to ensure replacement controllers are configured correctly.