Toro 04861, Service Manual

Page: 40 / 234

Fault Table (continued)
Fault
Number Fault Title Controller
Affected Fault Condition/Circuit
Description Additional
Notes Service Actions
3 5V Supply
Fault Primary The 5 V regulator on
the TEC cannot maintain
regulation at an acceptable
voltage level. Most likely there is a short circuit on
the 5 V supply line that powers the
throttle sensor.
4 Precharge
Fault Primary The TEC checks and
then monitors for proper
voltage. The TEC confirms
that the contactor voltage
drops sufficiently during
the discharge process and
rises sufficiently during
the pre-charge process.
Failure of either process
will trigger a fault. 1. Verify the battery is charged.
2. Make sure the work lights are
off, and check the wiring to the
contactor for shorts.
3. Replace the contactor.
5
Commun-
ication
Fault
Primary The primary has not
received a message from
the motor for more than
2.5 seconds, or from the
battery for more than 1
second.
Check the CAN bus for proper
continuity and proper termination.
7 Motor Over
Temperature Motor This fault is declared when
the FET temperature or
the motor temperature
exceeds the design
limit set point. When
the overtemp region is
entered, motor current is
limited on a linear basis
until the absolute overtemp
value is reached. A side effect of
this fault is that
the motor output
torque will be
limited. This will
result in reduced
reel speed and
potential stall. 1. Let machine cool. Note that this
fault is not produced by a bad
sensor.
2. Open the rear discharge of the
cutting unit.
3. Reduce reel speed.
4. Reduce mow speed.
9 Internal
Motor Fault Motor The motor detected an
internal fault condition. 1. Verify the battery is charged.
2. Test for proper supply voltage at
the motor and its controller.
3. Test the main contactor coil.
4. Replace the motor.
5. Replace the TEC.
10 Motor
Stalled Motor Motor at zero RPM for
more than 3 seconds.
Insufficient torque to rotate
motor. Can occur during
heavy cutting
conditions or
cutting unit
malfunction. 1. Check cutting unit and motor
mechanical resistance.
2. Check bedknife adjustment and
condition of reel.
3. Motor will likely need replacing
if the fault continues.
11 Software
Incompatible One of the devices in the
system has software that
is incompatible. Use Toro DIAG to reprogram the
machine.
12 Key Stuck
On Primary The battery has detected
the key switch in the
START position for longer
than allowed. 1. Verify the battery is charged.
2. Test the key switch wiring.
3. Test the key switch.
13 Internal
Battery
Fault Battery
Management
System Internal BMS detected
fault. 1. Reboot the machine.
2. Disconnect and reconnect the
battery.
3. Recharge the battery.
4. Replace the battery.
Troubleshooting: Machine Faults Page 3–6 Greensmaster ® eFlex 1021
20248SL Rev C