66Service Manual – SC6000 24 - Electrical System
Located below the left side of the oor panel are two power
relays (K2 & K3). These are connected directly to the
battery and supply high-energy power to the power module
and the drive controller. These relays are controlled by the
module for which they provide power, but are wired slightly
different.
One side of the K2 power relay coil is connected to battery
power, and the Power Module activates the relay by pulling
the other connection to ground.
Both sides of the K3 drive relay are connected to the drive
controller. The positive side is kind of like an enable circuit
that enables both the K3 relay and the brake release.
However, the negative side of the two are controlled
separately.
Low Voltage Cutout
The main machine controller is equipped with a low-voltage cutout feature to prevent over-discharging of the
batteries. When the battery voltage falls below a dened threshold, some machine functions are disabled.
These threshold values are dependant on the type of battery specied in the main controller. In the rst
stage of cutout, the scrub system is disabled, but the recovery system will remain active. At the second stage,
even the recovery system will be disabled, but the drive system remains active.
The drive controller has its own cutback feature, separate from the main controller. When the drive
controller senses battery voltage too low, it will reduce power output to the drive motor to protect the
battery.
Cutout Level Threshold-Wet Threshold-AGM Affected Systems
Stage 1 30.8 32.6 All scrub functions disabled
Stage 2 30.6 32.4 Both scrub and recovery disabled
K2 Power
Relay
K3 Drive
Relay
Battery
Cable
Power
Jumper
To Next Page
Loading...
Need help?
General
