Chapter 3 — Troubleshooting
26
Forklift Power Supply Installation Guide
Identifying and Correcting Problems
The following is an overview for troubleshooting the forklift
power supply installation:
1
Inspect the hardware.
2
Check the electrical measurements.
3
Substitute components.
Use the procedures within this chapter to identify and the power
supply problems you may encounter during installation.
Connector pin-out information is also furnished for your
convenience.
Inspecting the Hardware
Always check the hardware first. You should check the power
supply, the cables and connections, and the fuse.
•
If the LED is lit, and you suspect a power failure, check the
output cable and its connections.
•
If the LED is not lit, the power supply is not producing 12 Vx
output power. In this case, a fault can exist anywhere in the
system. Use the tables starting on page 30 to isolate, identify,
and correct the fault.
•
If the LED is flickering, the power supply has detected a fault
condition related to temperature, voltage, or current. The
LED will flicker until the problem is resolved. In some cases,
you may have to remove power to reset the power supply.
Checking the Electrical Measurements
You can measure the voltage or test for continuity to
troubleshoot the battery cable.
Measuring the Voltage
Connector pinout information is provided to allow you to
measure voltage at the input power cable connector and at either
end of the power output cable.
Performing Continuity Testing
Thorough continuity testing takes longer than either
substitution or taking voltage measurements. An ohmmeter is
sufficient to diagnose simple opens or shorts.
