Clark GEX20 - Page 159

Group 19, Motor Controls
SM 765, Dec ’06 CONTROL TROUBLESHOOTING • 19-3-9
Fault
Code
Fault Name Fault Description Control Troubleshooting
Action
Required
87 "WATCH-
DOG"
Watchdog circuit
has been triggered
SLAVE • 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 communication. So , before replac-
ing the controller , check the Canbus
88 “CHOPPER
RUNNING”
FET is running SLAVE • XXXX
96 "LOGIC
FAILURE #3
Failure in overload
protection hw cir-
cuit
SLAVE • Fault in the hardware section of the con-
troller that manages the hardware current
protection.
Replace con-
troller
97 "LOGIC
FAILURE #2
Failure in U,V,W
voltage feedback
circuit
SLAVE • Fault in the hardware section of the con-
troller that manages the phase 's voltage
feedback.
• Line contactor not closing, check param-
eter setting for main contactor.
Replace con-
troller
98 "LOGIC
FAILURE #1
An over voltage or
under voltage con-
dition has been
detectedSLAVE
• This fault signals that the under voltage /
over voltage protection interrupts been
triggered
• 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.
99 "TH
MOTOR
SENSOR
KO"
Warning:Motor
Slave tempera-
ture sensor is out
of range
SLAVE • The range of the motor temperature ana-
log sensor is always checked and a fault
is signaled if it's out of range
• When this fault occurs. The maximum
current is reduced to half and maximum
speed is reduced to 60 Hz.
109 "VMN
LOW"
Wrong voltage on
motor power out-
puts; failure in the
power section or
in the mosfet
driver circuit or in
the motor
SLAVE • This test is carried out during initial diag-
nosis and in standby. Possible causes:
• Problem with motor connections or the
motor power circuit; check if the 3
phases are correctly connected; check if
there's chassis ground of the motor to
truck frame.
• unhook battery at controller and do a
diode check between Batt + and Batt -
(should read .3 to .5 volts)
• Fault in the controller power section.
Replace con-
troller