Service manual

58 - FORM NO. 56043098 - Convertamatic
™
24C, 24D, 26C, 26D, 28C, 28D
ELECTRICAL SYSTEM
SERVICE TEST MODE:
To assist in the troubleshooting and servicing of the electrical system and related components on the CONVERTAMATIC scrubbers, a special test mode that allows
independent control of the various outputs and monitoring of the various inputs has been incorporated.
To enter the service test mode perform the following step:
1 Turn the main power Key Switch (A) to the off position.
2 Press and hold the Wand Switch (E).
3 While holding the wand switch turn the main power key switch to the on position.
4 Continue to hold the wand switch until the Wand Indicator (M) turns green.
5 Release the wand switch.
6 The Display (D) will now display “SVCTEST” and current battery voltage and speed control status (SCS).
7 The function of each switch and indicator is described below.
8 To exit this mode, turn the main key switch to the off position.
INPUT INDICATORS (SEE FIGURE 6 FOR PANEL DISPLAY & BUTTON LOCATIONS):
SCS:
Speed control status signal. This is an output from the speed control to the main control unit that indicates the status of the speed control. Normally this indicator will
be displayed whenever the key is on. If there is a speed control fault this indicator will fl ash the fault code produced by the speed control. Refer to the speed control
section for details on these codes.
If (SCS) does not display following the troubleshooting procedure below.
• Disconnect the Org/Blu wire from the speed controller and main controller and check the continuity of the wire. If the wire tests open repair or replace the wire
or plug. If wire tests ok replace the speed controller.
F/R:
Speed control forward/reverse signal. This is an output from the speed control to the main control unit that indicates when the throttle has been moved from the
neutral position either forward or reverse. (F/R) will be displayed if this signal is active.
If (F/R) does not display following the troubleshooting procedure below.
• Disconnect the Red/Blk wire from the speed controller and main controller and check the continuity of the wire. If the wire tests open repair or replace the wire
or plug. If wire tests ok replace the speed controller.
REV:
Speed control reverse signal. This is an output from the speed control to the main control unit that indicates when the throttle has been moved to the reverse position.
(REV) will be displayed if this signal is active.
If (REV) does not display following the troubleshooting procedure below.
• Disconnect the Blu/Blk wire from the speed controller and main controller and check the continuity of the wire. If the wire tests open repair or replace the wire
or plug. If wire tests ok replace the speed controller.