Troubleshooting
GVI Product Manual: Frames C, D & E
50
192-300300N1 GVI Frames C, D & E 2019-9
3. Verify that all power and signal wiring to the motor controller is correctly connected.
Refer to chapter 10.6 for power connections.
4. Verify that connections to battery and motor terminals are tightened with appropriate
torque (chapter 10.6).
5. Verify that the control I/O plug is fully mated and latched into position with the mating
connector on the motor controller.
6. Verify that the motor controller is correctly fused for the application. Refer to the vehicle
manufacturer’s maintenance documentation for the correct fuse size.
7. For traction applications, raise up or otherwise disable drives wheels to prevent the
possibility of unexpected vehicle motion or motion in the wrong direction during initial
commissioning. For hydraulic applications, open the valve to prevent the possibility of
excess pressure build-up (in the event of a pressure relief valve malfunction).
10.7.2. Verifying motor controller readiness for operation
The following procedure can be used to verify that a motor controller is functional and able to communicate
over CAN bus.
1. Apply logic power to motor controller by applying battery power to KEY_INPUT.
2. Verify that the LED status indicator (see chapter 11.1) on the motor controller lights
steadily in on condition.
3. If the indicator is flashing or off, it indicates an error/warning or other fault condition
within the motor controller (see chapter 11).
11. Troubleshooting
11.1 LED status indicator
The LED status indicator (Figure 9) informs about the current state of the motor controller according to Table
13.
LED status indicator
appearance
Drive condition
Off
Motor Controller is not powered, or powered but not functional.
On (steady light)
Motor Controller is fully operational with no error condition.
Blinking very slowly (0.1 Hz)
Sleep mode is activated.
Blinking slowly
A warning condition is active. This may cause the motor controller to reduce
maximum available output power to the motor.
Blinking rapidly
An error condition is active. This may cause the motor controller to shut
down output power to the motor.
Intermittent blinking
Motor Controller is in software boot mode, caused either by an on-going
software download or by missing or corrupt application software.
Table 13 LED status indicator
1 sec
On
Off
1 sec
On
Off
1 sec
On
Off
