Section 5 • Fault Codes
Part No. 227656
GR-20J • GR-26J
5 - 11
September 2016
FAULT CODE CHART
Error Source
Error Type
ID
Name
ID
Name
Condition
Solution
28
VMN left low
The VMN voltage of the
left motor is low when it
should be high.
This alarm only appears when
the drive motors are activated.
Check: internal motor
connections. Electric cable
connections, leakage from the
motor to the framework of the
platform. If everything is OK, the
controller has an internal fault.
29
VMN left high
The VMN voltage of the
left motor is high when it
should be low.
This alarm only appears when
the drive motors are activated.
Check: internal motor
connections. Electric cable
connections, leakage from the
motor to the framework of the
platform. If everything is OK, the
controller has an internal fault.
30
Driver closed
Before activating the
power relay, the controller
checks whether the driver
is closed. If the test is not
conclusive, this alarm
appears.
Check the contacts of the power
relay. Replace the power relay if
necessary.
31
Driver open
The power relay is
controlled by the
controller, but this will not
close.
The power relay is probably not
working. Replace it.
02
Controller
logic
board
32
Logic fault #1
Under-voltage or over-
voltage has been detected
If the fault is detected on
starting or during an alarm, it is
most likely to be under-voltage.
Check whether the main voltage
SI is stable. If the fault is
detected during acceleration of
the drive motors or pump, the
fault may be due to under-
voltage: check the battery
charge and connections. If the
fault is detected during braking,
the fault may be due to over -
voltage: check the battery
voltage during braking.
Содержание GR-26J
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