Group 19, Motor Controls
SM 765, Dec ’06 CONTROL TROUBLESHOOTING • 19-3-11
Fault
Code
Fault Name Fault Description Control Troubleshooting
Action
Required
150 "WATCH-
DOG"
Watchdog circuit
has been triggered
PUMP • It is a self-diagnosing test within the
logic between Master and Slave micro
controllers. This fault could also be
caused by a CAN-BUS malfunction,
which blinds Master -Slave communica-
tion. So , before replacing the controller ,
check the CAN-BUS
151 “CHOPPER
RUNNING”
FET is running PUMP • XXXX
155 "EEPROM
KO"
Warning:
Eeprom fault
controller will
use default
parameters
PUMP • Fault in the area of memory in which the
adjustment parameters are stored; this
fault does not inhibit truck operation, but
the controller will use default parame-
ters.
• If defect persists when key is switched
OFF and ON again, replace the logic
board. If the fault disappears, remember
that the parameters stored previously
have been cancelled and replaced by the
default values.
160 "LOGIC
FAILURE #2
Failure in U,V,W
voltage feedback
circuit
PUMP • Fault in the hardware section of the con-
troller that manages the phase 's voltage
feedback.
Replace con-
troller
161 "LOGIC
FAILURE #1
An over voltage or
under voltage con-
dition has been
detected
PUMP • This fault signals that the under voltage /
over voltage protection interrupt has
been triggered. Two possible reasons:
• A real under voltage / over voltage situa-
tion happened.
• Verify battery setting.
• Fault in the hardware section of the con-
troller that manages the over voltage pro-
tection. Replace logic Card.
• Possible plugging in or unplugging of
battery or charger with the key switch on.
Replace con-
troller
171 "MOTOR
SHUT-
DOWN"
Warning: Pump
motor temp. are
very high (over
MOTOR SHUT-
DOWN param.)
PUMP • This fault occurs when the pump motor
temperature switches are open (digital
sensor), or if the analog sensor tempera-
ture overtakes the cut off level.
• The cut off level is adjusted with the
MOTOR SHUTDOWN parameter
(145°C) in the ADJUSTMENT sub-
menu.
• If this fault occurs, maximum current is
reduced to 130 amps needed for steering.
• If the shutdown occurs when the motor is
cold check the wiring. If wiring is ok
replace logic board.
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