October 2008 "2033ES / 2633ES" Service & Parts Manual - ANSI Specifications
Page 4-16
6 Flashes
7 Flashes
8 Flashes
9 Flashes
Battery voltage fault.
• This includes battery voltage below 12 volts or above 45 volts as
measured on pin #1.
• This code will disable all functions.
Thermal cutback.
• Sevcon internal temperatures above 176 degrees F.
• Will limit motor speed in comparison with over temperature.
• Resets when cooled.
Battery voltage at or below 18 volts
• As measured on pin #1.
• This code will interrupt or prevent lift function but will allow drive and
steer functions.
When lift is interrupted due to a 9 flash, the electric motor will still run.
Accelerator fault.
Set with unit at rest, a 6 flash will result in an 80% cutback of motor speed. The
Accelerator is the proportional control circuitry for the Sevcon. It works in
conjunction with the potentiometer located in the upper control box, which is
connected to the joystick handle through a gear arrangement.
Measure voltage at terminals 14 and 15 on the platform terminal
strip or at the potentiometer plug connection.
• With the joystick handle in neutral, 3.6 volts should be measured on
the accelerator circuit (wire #14).
• Voltage proportionally decreases with the travel of the joystick, with
0 volts at full stroke.
• With the joystick centered, voltages lower than 3.1 or higher than 3.9
will trigger a (6 flash) code.
LED Diagnostics Definitions (continued)
LED READING DIAGNOSIS
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