FORM NO. 56043058 Hydro-Retriever™ 3800 / 2042 / BR 1100 -
71
ELECTRICAL SYSTEM
Input Indicators:
See Figure 10 for button locations.
Battery status red indicator (43):
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 blink every 5 seconds when the key is on. If there is a speed control fault this indicator will flash the fault code produced by the
speed control. This is an active low signal. (High state = approximately 36 volts, low state = approximately 0 volts).
Battery status yellow indicator (44):
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 yellow indicator will be lit if this signal is active low. (High state = approximately
36 volts, low state = approximately 0 volts).
Battery status green indicator (45):
Throttle reverse signal. This is an output from the throttle to the main control unit that indicates when the throttle has been moved in the reverse
direction. The green indicator will be lit if this signal is active high. (High state = approximately 36 volts, low state = approximately 0 volts).
Status Display (32):
If no over-current faults are present, the status display will show 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 leftmost digit
(46,47,48 & 49)
of the display is used to indicate the current direction for the pad/brush lift actuator and squeegee lift actuators.
This will be described in detail in the sections pertaining to the control of the actuator outputs.
The digit second from the left will be “P” if the pre-sweep foot pedal switch is closed or if side broom unit is installed.
If over-current faults are present, the status display will indicate the fault codes.
Output Controls:
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.
Horn switch
(42)
: Used to jog actuators.
Scrub off switch
(25)
: Controls pad/brush motor.
Normal scrub switch
(26)
: Controls pad/brush lift actuator.
Heavy scrub switch
(27)
: Controls squeegee lift actuator.
Vacuum switch
(29)
: Controls vacuum.
Solution switch
(30)
: Controls solution solenoid.
Dust control switch
(39)
: Controls the pre-sweep/side-broom and dust control (optional).
Horn Switch (42):
This switch is used to momentarily activate either the pad/brush lift actuator or the squeegee lift actuator. See the descriptions below for more
details.
Scrub Off Switch (25):
This switch is used to toggle the state of the pad/brush motor. Pressing and releasing this switch will alternately turn the pad/brush motor on and
off. The indicator
(34)
provides the following status information:
Off
- Pad/brush output is off and there is no current flow through the contactor coil and no pad/brush motor current sensed.
Green
- Pad/brush output is on and there is normal current flow through the contactor coil and normal pad/brush motor current sensed.
Flashing red
- Either the pad/brush motor output is off and there is current flow through the coil, or pad/brush motor current is sensed (shorted
output driver, control error, shorted contactor, wiring error), or the pad/brush motor output is on and there is no current flow through the coil, or
no pad/brush motor current is sensed (open circuit, open relay coil, open contactor contacts, wiring error or open output driver).
SERVICE TEST MODE (CONTINUED)
revised 12/02
