• Defective LED.
Disconnect LED and connect handset. If handset
works, replace LED.
Dash Display
Controller LED
Handset or PC
CONDITION
No LEDs or LCDs
illuminated
LED OFF
NO COMMUNICATION
Dash display and/or controller LED inoperative.
TRUCK RESPONSE
Travel and hydraulic functions normal.
POSSIBLE CAUSES AND TEST PROCEDURE
• Defective controller.
Connect handset to controller and confirm communication
to handset.
If handset will not communicate with controller,
replace controller.
Dash Display
Controller LED
Handset or PC
CONDITION
No Alarm
LED OFF - No Flashes
INCORRECT START
Improper startup sequence by operator.
TRUCK RESPONSE
Traction and hydraulic functions disabled.
POSSIBLE CAUSES AND TEST PROCEDURE
• Throttle or hydraulic function selected at key ON.
Steer handle in run position at key ON.
Return steer handle to full upright position. Return
throttle to neutral. Release all hydraulic
function controls.
If fault remains, attach handset and go to test menu.
• Check brake switch, it should be off. If steer handle
is in vertical position and reading is not OFF, check
brake switch for damage, interference, or shorts.
• Check accelerator - Should be 0 volts at neutral. If
not, repeat control card calibration. If this does not
correct the problem, replace control card.
• Check hydraulic inputs – Should be 0 volts. If not,
recalibrate tiller card. Follow auto-learn procedure
listed in steering. If this does not clear fault, check
buttons for damage or interference. Replace damaged
or faulty buttons.
Dash Display
Controller LED
Handset or PC
CONDITION
AL66
Continuous Flashing
BATTERY LOW
Battery discharged and requires charging.
TRUCK RESPONSE
Hydraulic lift function disabled.
POSSIBLE CAUSES AND TEST PROCEDURE
• Battery voltage is low.
Charge or replace battery.
• Controller voltage calibration is incorrect.
Install handset. Go to test menu and select
Battery Voltage. Compare tester voltage to voltage
measured by an accurate digital voltmeter
between B+ and B terminals. Pull down tiller
handle to engage contactor for this measurement.
If these two voltages are more than 1.5
volts difference, replace controller.
Dash Display
Controller LED
Handset or PC
CONDITION
AL99
Continuous Flash
BATTERY KO
Improper battery connection or defective battery.
TRUCK RESPONSE
Traction and hydraulic functions disabled.
POSSIBLE CAUSES AND TEST PROCEDURE
• Incorrect battery selected.
Verify correct battery voltage for truck.
• Damaged or extremely discharged battery.
Disconnect battery and check voltage at connector.
Inspect battery for correct water level and
FOR REFERENCE ONLY 5/4/10 Rev A
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