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©2022 FJDynamics. All rights reserved.
FJDZ42P Electric Zero-turn Mower User Manual
8.6 Faults
When a fault is detected, the control system takes measures to protect the user and the mower.
While powering off the mower or a component, the control system displays the fault on the control
terminal. Most faults can be quickly rectified by noting the causes, restarting the mower (pressing
the start/stop button), and changing the way that the operator uses the mower. Refer to the
following table for the faults that may occur during operations. If a fault persists, it needs to be
resolved by a trained professional using a more detailed solution.
Battery charging
undertemperature protection
Battery charging
overtemperature protection
Battery discharging overcurrent
protection
Battery undervoltage
protection
Single-cell undervoltage
protection
Battery charging overcurrent
protection
Battery overvoltage protection
Single-cell overvoltage
protection
Battery discharging
undertemperature protection
Battery discharging
overtemperature protection
Battery ambient
undertemperature protection
Battery ambient overtemperature
protection
Battery overtemperature
protection
Low battery level protection
Battery voltage sampling fault
Battery short-circuit protection
Battery temperature sampling
fault
Battery charging
undertemperature alarm
Battery charging
overtemperature alarm
Battery discharging overcurrent
alarm
Battery undervoltage alarm
Single-cell undervoltage alarm
Battery charging overcurrent
alarm
Battery overvoltage alarm
Single-cell overvoltage alarm
Battery discharging
undertemperature alarm
Battery discharging
overtemperature alarm
Battery ambient
undertemperature alarm
Battery ambient overtemperature
alarm
Battery overtemperature alarm
Battery software communication
fault
Left drive motor and controller
mismatch
Left drive motor overvoltage
protection
Left drive motor undervoltage
protection
Left drive motor communication
fault
Left drive motor locked-rotor
protection
Abnormal left drive motor
voltage
Left drive motor
overtemperature protection