HELI G3 Series, Operation & Service Manual

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43
FAILURE
#2
Fault in the hardware section of the logic board which deals with voltage feedbacks
of motor phases.
Troubleshooting
The failure lies in the controller hardware. Replace the controller.
19
LOGIC
FAILURE
#1
Cause
This fault is displayed when the controller detects an undervoltage condition at the
key input . Undervoltage threshold is 11V for 36/48V controllers and 30 V for 80V
controllers.
Troubleshooting (fault at startup or in standby)
- Fault can be caused by a key input signal characterized by pulses below the
undervoltage threshold, possibly due to external loads like DC/DC converters
starting-up, relays or contactors during switching periods, solenoids energizing or
de-energizing. Consider to remove such loads.
- If no voltage transient is detected on the supply line and the alarm is present
every time the key switches on, the failure probably lies in the controller hardware.
Replace the logic board.
Troubleshooting (fault displayed during motor driving)
- If the alarm occurs during motor acceleration or when there is a
hydraulic-related request, check the battery charge, the battery health and
power-cable connections.
28
PUMP
VMN
LOW
Cause:
The pump motor output is lower than expected, considering the PWM duty cycle
applied.
Troubleshooting:
A) If the problem occurs at start up (the LC does not close at all), check:
- Motor internal connections;
- Motor power cables connections;
- If the motor connection are OK, the problem is inside the controller.
B) If the problem occurs after closing the LC (the LC closes and then opens back
again), check:
- Motor internal connections;
- If motor windings/cables have leakages towards truck frame;
- If no problem are found on the motors, the problem is inside the controller.
C) If the alarm occurs during motor running, check:
- Motor internal connections;
- If motor windings/cables have leakages towards truck frame;
- That the LC power contact closer properly, with a good contact;
- If no problem are found on the motors, the problem is inside the controller, it is
necessary to replace the logic board.
29
PUMP
VMN
HIGH
Cause:
This test is carried out when the pump motor is turning (PWM applied). The pump
motor output is higher than expected, considering the PWM applied.