Toro Greensmaster eFlex 1021 Service Manual page 38

Fault Table (continued)
Fault Fault Title
Controller
Number Affected
3 5V Supply Master
Fault
4 Precharge Master
Fault
5 Commun- Master
ication
Fault
7 Motor Over Motor
Temperature
9 Internal Motor
Motor Fault
10 Motor Motor
Stalled
11
Software
Incompatible
12 Key Stuck Master
On
13 Internal Battery
Battery Management
Fault System
Troubleshooting: Battery Charger Error and Fault Codes
Fault Condition/Circuit
Description
The 5 V regulator on
the TEC cannot maintain
regulation at an acceptable
voltage level.
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.
The master has not
received a message from
the motor for more than
2.5 seconds, or from the
battery for more than 1
second.
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.
The motor detected an
internal fault condition.
Motor at zero RPM for
more than 3 seconds.
Insufficient torque to rotate
motor.
One of the devices in the
system has software that is
incompatible.
The battery has detected
the keyswitch in the
START positon for longer
than allowed.
Internal BMS detected
fault.
Page 3–6
Additional
Service Actions
Notes
Most likely there is a short circuit on
the 5 V supply line that powers the
throttle sensor.
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.
Check the CAN bus for proper
continuity and proper termination.
A side effect of 1. Let machine cool. Note that this
this fault is that fault is not produced by a bad
the motor output sensor.
torque will be
2. Open the rear discharge of the
limited. This will
cutting unit.
result in reduced
reel speed and
3. Reduce reel speed.
potential stall.
4. Reduce mow speed.
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.
Can occur during 1. Check cutting unit and motor
heavy cutting mechanical resistance.
conditions or
2. Check bedknife adjustment and
cutting unit
condition of reel.
malfunction.
3. Motor will likely need replacing if
the fault continues.
Use Toro DIAG to reprogram the
machine.
1. Verify the battery is charged.
2. Test the key switch wiring.
3. Test the key switch.
1. Reboot the machine.
2. Disconnect and reconnect the
battery.
3. Recharge the battery.
4. Replace the battery.
Greensmaster ® eFlex 1021
20248SL Rev A