Activating The Cutting Unit; Cutting Motor Signals - Husqvarna 967187001 Workshop Manual

CST-drive mode logging

12.15 Activating the Cutting Unit

1
After activating the cutting deck by lowering it, a
+5 V signal is sent to CCU from the microswitch to
connector A:1 gray lead.
Cutting deck on switch 1
Connector A at CCU
CCU activates the cutting motors by sending a
+36 V start signal to the motor electronic units via
connector D:12. This signal also goes via the other
microswitch, which is mounted in parallel with the
microswitch located by the lift lever that sends the
signal for activation of the cutting deck to CCU.
Both these switches are activated simultaneously.
Connector D at CCU
Cutting deck on switch 2
124
English –
Gray wire to CCU
Connector A pin 1
+5V
A1: Lift SW
D12: Cutter_ON
Yellow leader goes to the
respective cutting motor
controls.
Brown wire from CCU
connector D pin 12
The signal to CCU A:1 is the signal that in the test
is called Lift Switch. If the cutting deck's two mo-
tors start as intended, CST down is indicated and
other signal as below:
Cutting motor 1 signal 1. = Low signal
Cutting motor 1 signal 2. = Low signal
Cutting motor 2 signal 1. = Low signal
Cutting motor 2 signal 2. = Low signal

12.16 Cutting Motor Signals

Cutting motor control version 1
(two separate boxes mounted on the cutting deck)
There are two signal for fault messages per con-
trol, i.e. four in all. What we see in the box for the
cutting motor signals are these signals for fault
messages. In normal operation without faults, all
signals are high, about +12 V if voltage is mea-
sured on leads going to the engine controls. The
leads in the connector for this signal in the four-
pole connector coming from the machine (CCU)
to the cutting deck engine controls are gray and
white, in the other four-pole connector that comes
from the machine (CCU), the leads are yellow and
red. The leads to the engine control change color
to red and orange for both engine controls.
Cutting motor control version 2
(one box mounted on the cutting deck)
Mode
SavE regulating heavy
SavE regulating
medium
Normal operation
Error
MC_Error MC_ECO
High High
Low High
High Low
Low Low