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Alarms, Trips, and Troubleshooting
Alarms and Trips
This section lists the available User Notification codes of the keypad display and provides information
that assists the user in the event that a Fault is incurred. The User Notification codes are displayed as an
indication that a system function or system condition is active (i.e., ATN or DBON). The code is displayed
on the keypad for the duration of the activation.
If a user setting or an ASD parameter has been exceeded, or if a data transfer function produces an
unexpected result, a condition that is referred to as a Fault is incurred.
An Alarm is an indication that a Fault is imminent if existing operating conditions continue unchanged.
An Alarm may be associated with an output terminal to notify the operator of the condition remotely,
close a contact, or engage a brake. At the least, an Alarm will cause an alarm code to appear on the
keypad display.
HX7+ ASD.
In the event that the condition that caused the Alarm does not return to its normal operating level within a
specified time, the ASD Faults and a Trip is incurred (Fault and Trip are sometimes used
interchangeably). A Trip is a safety feature, and is the result of a Fault, that disables the ASD system in
the event that a subsystem of the ASD is malfunctioning, or one or more of the variables listed below
exceeds its normal range (time and/or magnitude).
• Current,
• Voltage,
• Speed,
• Temperature,
• Torque, or
• Load.
See
Table 19 on pg. 199
The operating conditions at the time of the trip may be used to help determine the cause of the trip. Listed
below are operating conditions that may be used to assist the operator in correcting the problem or that the
ASD operator should be prepared to discuss when contacting the
assistance.
• What is the ASD/Motor size?
• What trip information is displayed?
• Is this a new installation?
• Has the system ever worked properly and what are the recent modifications (if any)?
• Does the ASD trip when accelerating, running, decelerating, or when not running?
• Does the ASD reach the commanded frequency?
• Does the ASD trip without the motor attached?
• Does ASD trip with an unloaded motor?
• What is the CPU version and revision level?
• What is the EOI (keypad) version?
HX7+ ASD Installation and Operation Manual
Table 18 on pg. 197
lists the Alarm codes that may be displayed during operation of the
for a listing of the potential Trips and the associated probable causes.
Toshiba Customer Support Center
for
195
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