5-2
5.1 Troubleshooting
Types of problems
■ Introduction
The following three types of problems can conceivably occur when starting up and be-
ginning to operate the device.
• Problems due to a mismatch between device specifications and actual usage
conditions
• Problems due to erroneous configuration or operation
• Problems due to device failure
Using the self-diagnostics function, problems with the device are recognized, divided
into “major” and “minor,” and either displayed or addressed. When a problem occurs,
refer to the troubleshooting guide presented here and take appropriate action.
■ Major failure
“Major failure” refers to a state in which a serious problem has arisen in the operation
of the device and, if no action is taken, damage to the device itself may result. Should a
serious problem occur during operation of the device, the output air pressure (position)
and travel transmission output will continue to output the value which has been set for
the error processing (fail-safe) direction.
Example:
VTD FAULT # This is the message when the position sensor (VTD) fails.
■ Minor failure
In a “minor failure” state, there is no serious problem for the operation of the device. If
a problem has occurred during operation of the device, and the self-diagnostics deter-
mine that the device has experienced a minor failure, the travel transmission output will
continue to operate normally without changing to the fail-safe output.
Example:
MANUAL MODE # This is the message when the device is in the “dummy current” input
state.
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