Clark GEX20 - Troubleshooting

Group 19, Motor Controls
19-3-2 • CONTROL TROUBLESHOOTING SM 765, Dec ’06
Fault Code Charts
Fault
Code
Fault Name Fault Description Control Troubleshooting
Action
Required
1 "NO SEAT
SWITCH"
No input from seat
switch
MASTER
or SLAVE
• Controller detects the seat switch is open
during operation.
• Check seat switch wiring and connec-
tions
• Check for inoperative seat switch.
Repair seat
switch wiring
Replace seat
switch
2 “CHOPPER
RUNNING”
FET is running MASTER • XXXX
8"WATCH-
DOG"
Watchdog circuit
has been triggered
MASTER • 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 replacing the controller , check
the Canbus
9"INPUT
MIS-
MATCH"
Seat Switch mis-
matched
MASTER • The seat switch input for traveling is dif-
ferent from that of hydraulic system.
• Check the seat switch line connected to
travelling controller and hydraulic con-
troller.
10 "WATCH-
DOG"
Watchdog circuit
has been triggered
MASTER 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 replacing the controller , check
the Canbus
13 "EEPROM
KO"
Warning: EEprom
fault controller
will use default
parameters
MASTER • Fault in the area of memory in which the
adjustment parameters are stored;
• This fault does not inhibit truck opera-
tion, but the controller will use default
parameters.
• If fault persists when key is switched
OFF and ON again.
• If the fault disappears, remember that
the parameters stored previously have
been cancelled and replaced by the
default values.
Replace con-
troller
17 "LOGIC
FAILURE #3
Failure in overload
protection hard-
ware circuit
MASTER • Fault in the hardware section of the logic
board that manages the hardware current
protection.
Replace con-
troller