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12.12 Drive Motor Error
If this symbol is green, it indicates that it is OK. If it
is red, the drive motor is sending out a fault signal.
This fault signal goes to the CCU unit, which then
lights the red triangle on the control panel. The
warning signal can be have a number of reasons,
see below.
1. Battery voltage outside motor working range,
below 20 V in batteries when loaded.
Check battery acid level, top up with battery water
if the level is low, then charge the battery. If the
acid level is lower than the battery's lead plates for
a long period, the battery has probably been dam-
aged and must be changed.
2. Key switch not closed. If the key switch is turned
OFF while running the machine will stop. This fault
indication from the drive motor will not be clear as
the machine still stops.
3. The unit is deactivated. The drive motor is
activated by the key switch and a power relay. As
the key switch activates the whole machine, check
the thin red lead to the motor that runs from the
switching power relay coil. Check that the single-
action power relay is energized when the activation
button (I) is depressed.
4. Overcurrent limit passed/activated. The motor
should function again if the cause of the drive mo-
tor overcurrent is rectified.
5. Drive motor is overheating. The motor should
function again when the drive motor has cooled
down.
If the symbol is red and the drive motor is not in
working order, the drive motor must be changed if
other causes above can be eliminated.
12.13 Cutting Motor Signals
Cutting motor signals
Cutting deck status
Lift switch
Cutting motor 2 signal 1
Cutting motor 2 signal 2
Cutting motor 2 signal 2
Cutting motor 2 signal 2
The cutting deck is operated in this test and then
if there are any fault messages, they can be seen
in CST. There are four such signals. The are two
cutting motor controls for this machine, the first
(version 1) comprises two electronic units , one for
each motor and the second (version 2) comprises
one electronic unit. Different results can be ob-
tained from this test depending on which electronic
unit is controlling the motors. Troubleshooting
version 1 is described below. Both types of control
have two signals for each motor that the controls
can signal to, version 1 of the motor controls
sends two fault messages. Version 2 of the engine
controls sends one fault message per motor plus a
signal to activate savE mode.
12.14 Cutting Deck Status
This signal shows whether the cutting deck is
mounted. If CCU does not receive the signal that
the cutting deck is in place, it will not be possible to
activate the cutting deck.
Cuttingdeck safety switch
The microswitch is supplied with +5 V orange lead
and sends a signal to CCU via the brown lead.
The brown lead goes from the microswitch to CCU
connector D:8. When the cutting deck is mounted
correctly, this switch is activated and sends a +5 V
signal to CCU. When trouble shooting, the micro-
switch must be checked and that it couples forward
+5 V when affected. Measure with a multimeter
first that the connection to the microswitch with
orange lead has +5 V in relation to the GND pole.
When the microswitch is activated, this +5 V is
sent to CCU connector D:8. If the power supply
of the switch looks good, take a reading on the
pin into CCU so that +5 V is also present there. If
there is +5 V on the brown lead at the microswitch
but not on the brown lead at CCU, there must be
a break in the lead between the microswitch and
CCU.
CST-drive mode logging
Not locked
Up
Low signal
Low signal
Low signal
Low signal
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Table of Contents
Troubleshooting
