GreenWorks GZM48S User Manual

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L left blade motor fault code
A master controller fault code
BMS battery fault code
R right blade motor fault code
B slave controller fault code
M middle blade motor fault code
FAULTS
The Canbus system will take action to protect the user and machine when it detects an issue. When it
acts to turn off the machine or a component, it will indicate that a fault has occurred, and that fault will be
shown on the digital display. All electrical faults have a letter code followed by a number.
The rst letter describes the system that caused the fault according to this chart:
A Master Controller
B Slave Controller
BMS Battery
R Right Blade Motor
M Middle Blade Motor
L Left Blade Motor
Most faults are quickly corrected by noting what caused the issue, restarting the machine and changing
how the operator uses the machine. Use the below chart to find the solution for immediate fix during
operation and a more detailed solution if the problem persists to be completed by a trained professional.
System Code Fault Operator/Field Fix Technical/Diagnostic Fix
A/B 1.2 Controller
Overcurrent
If machine is operating
under heavy load,
reduce load with lower
speed drive.
1. Inspect traction motor wires and
connections as there may be a short. If
there is, replace traction motor and wires.
Cycle KSI 2. Replace controller
A/B 1.3 Current Sensor
Fault
Cycle KSI 1. Inspect traction motor wires and
connections as there may be a short. If
there is, replace traction motor and wires.
2. Replace controller
A/B 1.4 Precharge Failed Cycle KSI 1. Check wire connections to keyswitch.
2.Check the positive and negative poles of
the mower controller are shorted
A/B 1.5 Controller Severe
Undertemp
Bring unit into warm
environment and
allow the machine and
battery to warm up.
Bring heatsink temperature above -40°C,
and cycle interlock or KSI.
A/B 1.6 Controller Severe
Overtemp
Stop vehicle and
allow to cool down.
If operating in a hot
environment, wait until
temperature cools
down.
Bring heatsink temperature below +95°C,
and cycle interlock or KSI.
A/B 1.7 Severe Under
voltage
Check battery wires
and connections;
Check fuse state
and main contact
connections.
Capacitor bank voltage dropped below the
Severe Undervoltage limit with FET bridge
enabled.
ELECTRICAL SYSTEMELECTRICAL SYSTEM
Version 2 - 7.24.18

GreenWorks GZM48S Specifications

General

Brand	GreenWorks
Model	GZM48S
Category	Lawn Mower
Language	English