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151521-1CD
151521-1CD
4.6
Troubleshooting
Table 6-2 identifies common problems that could occur. To troubleshoot your system, identify the type
of problem and look for it in the PROBLEM column. Next to this column is a list of PROBABLE
CAUSES and CORRECTIVE ACTIONS.
Be aware that sometimes more than one problem can occur at the same time. After identifying and
resolving a problem, test the system thoroughly to make sure no other problems exist..
Table 4.2 Troubleshooting
Problem
Probable Cause
Corrective Action
No axis movement
Loose connection
Check all wire connections.
Incorrect wiring
Check that system has been wired correctly.
Overload
Reduce load and re-check. Repeat until problem
stops.
Unstable operation
Brake out of adjustment
If positioner movement is unstable, check brakes
and replace if necessary (see
).
Loose mounting
Check all mounting bolts and tighten as needed.
Improper gear
alignment and/or gear
lash adjustment
Check gear alignment and lash, and adjust as
needed (see Section 3.5).
Motor overheats
Excessive ambient
temperature
Reduce ambient temperature below 45° C (104° F).
Positioner has an operating range of 0 to 45° C
(32 to 113°F).
Motor surface is dirty
Clean motor surface.
Motor overloaded
Check motor connections and correct as needed.
Unusual noise
Motor is going bad
Call YASKAWA customer service.
Brakes
Inspect/replace the brake pads (see
).
Shaded text, remedies should be carried out after turning power off.
NOTE
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