58
- FORM NO. 56043071 CMAX
™
28/34ST / I-MAX
™
28/32C, BA 750/850ST, BA 750C
ELECTRICAL SYSTEM
Main Controller Inputs
See Figure 5 for button locations.
Battery status red indicator (K):
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. The red indicator will be lit if this signal is active.
To observe the battery pack voltage value see Status Display (A):
The status display will scroll the battery voltage. This display is accurate to /- 0.15 volts. Therefore, the voltage displayed may not correlate
precisely to a high-accuracy, calibrated voltmeter. The display format is 2 4 _ 0 (24.0 volts). The digit following the _ character indicates tenths
of a volt.
Main Controller Outputs
See Figure 5. The control panel switches are used to control various output functions of the main control unit. Below is a list of each switch and
the function it controls. Following the list is a detailed description of each function.
Scrub off/pressure-decrease switch
(H)
: Controls brush motor and optional brush remove relay.
Scrub-on/pressure-increase switch
(G)
: Controls scrub deck lift actuator.
Vacuum switch
(E)
: Controls vacuum.
Solution switch
(D)
: Controls solution solenoid.
Scrub OFF/Pressure-decrease Switch (H):
This switch is used to turn the brush motor on and off as well as turning the remove relay on and off. Upon entering the service test mode, pressing
and releasing this switch will alternately turn the brush motor on and off. The indicator
(I)
provides the following status information:
Off
- Brush motor output is off and there is no brush motor current flow.
Green
- Brush motor output is on and there is normal brush motor current flow.
Flashing green
- Either the brush motor output is off and the control is sensing brush motor current flow (control failure, shorted contactor, or wiring
problem) or the brush motor output is on and the control is not sensing any brush motor current flow (control failure, open contactor, or wiring
problem).
To control the remove relay output, press and release the scrub-off/pressure-decrease switch so that the brush motor is on. Next, press and hold
the scrub-off/pressure-decrease switch until the indicator turns red (approximately one second). Pressing and releasing this switch will now
alternately turn the remove relay on and off. The indicator provides the following status information:
Off
– Remove relay output is off.
Red
– Remove relay output is on.
To return to controlling the brush motor output, press and release the scrub-off/pressure-decrease switch so that the remove relay is on. Next,
press and hold the scrub-off/pressure-decrease switch until the indicator turns green (approximately one second). Pressing and releasing this
switch will now alternately turn the brush motor on and off.
SERVICE TEST MODE (CONTINUED)
