Motor parameter out of the range of
controller.
Motor type is out of OS system.
Select correct motor
type, cycle KSI.
The VCL software in the controller
doesn’t match the OS software in the
controller.
Download the correct
VCL and OS software
into the controller.
Vehicle movement sensed after the
EM brake has been commanded to
set.
Adjust the braking
force of the EM brake.
Encoder LOS (Limited
Operating Strategy)
EMR timeout timer has expired or
EMR input is closed.
The hardware in the controller doesn’t
match the software in the controller.
(2) 1253 series controller
The controller can send fault into meter to receive diagnosis information through
LED flickering times and serial port.
Table 4-6 Fault code and troubleshooting of 1235 series controllers
No power or defective
controller.
Controller or microprocessor
fault.
Controller operational, no
known faults.
1) EEPROM data lose or damaged.
2) EEPROM checksum error. Can be
cleared via modify any parameter
value in program menu of 1311.
1) MOSFET shorted.
2) Motor connection is open.
Battery voltage < LOVLOT CUTOFF
1) Controller received effective lift
lockout signal.
2) SS LIFT LOCKOUT parameter is
not set correctly.
SEQUENCE ERROR (Statup
lockout)
1) Improper sequence of throttle/SS
input and KSI or interlock input.
2) Wrong startup lockout type selected.
3) Misadjusted throttle.
1) Throttle wire open/short.
2) Defective throttle.
3) Wrong throttle type selected.
1) Main contactor is welded.
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