Wheel System - Traction
120
Service Manual – SC1500
Troubleshooting
General Troubleshooting
Note:
use the Service Test Mode to simplify troubleshooting the Drive Wheel System. (Refer to the
Controls
System/Service Test Mode
.)
Problem
Cause
Correction
Machine not moving in
forward or reverse.
The Speed Adjustment Knob
is set too low.
Rotate the Speed Adjustment Knob to a higher speed
setting.
Discharged batteries..
Check the battery voltage and charge as necessary.
The E1 Curtis Speed
Controller not receiving input
requests from the A1 Control
Board for travel.
1. Make sure the Speed Controller is sending
signals to the A1 Control Board that indicate it is
trying to move the machine.
2. If the Speed Controller is sending signals to the
A1 Control Board, check to see if there is voltage
across the motor terminals. If the voltage is above
6 volts and the drive motor is not turning, the
motor is the problem (check the carbon brushes).
No voltage to the drive motor.
1. Check the wiring from the Speed Controller to the
drive motor and repair as necessary.
2. If the wiring is OK, replace the Speed Controller.
E1 Curtis Speed Controller Diagnostics
Diagnostics Method A - Graphic Display and Detergent On/Off Indicator
Diagnostics Method A uses the machine’s graphic display and Detergent On/Off Indicator (LED) to show the
Speed Controller fault codes. The E1 Curtis Speed Controller will output a fault code if it detects a problem
associated with the Speed Controller and wheel drive system.
If a speed control fault occurs, the graphic display will show the
wrench icon and Control Board fault
03
When the
03
is displayed, the Detergent On/Off Indicator will flash a special error code
sequence until the fault is corrected. (The Forward/Reverse LED may also flash on some
on page 122 for a description of the fault
indications.
Service Note:
This is how to read the error code status light: For example, OO O
= two light flashes, a short pause, one flash, then a long pause, then
the code will be repeated. This indicates a fault code 2,1.
