Hi everyone,

H9 User Manuals: Alarms, Trips, and Troubleshooting

Alarms and Trips Overview
This section outlines the user-notification codes displayed on the EOI (Electronic Operator Interface) and provides information to assist users in the event of a Fault. The User Notification codes indicate that a system function or condition is active (e.g., ATN, DB, and DBON). These codes are displayed on the EOI for the duration of the activation.

If a user setting or an H9 ASD parameter is exceeded, or if a data transfer function produces an unexpected result, a Fault condition is incurred.

Alarms
An Alarm indicates that a Fault is imminent if the current operating conditions continue unchanged. An Alarm can be associated with an output terminal to notify the operator remotely, close a contact, or engage a brake. At a minimum, an Alarm will cause an alarm code to appear on the EOI display. Table 13 lists the Alarm codes that may be displayed during the operation of the H9 ASD.

Trips
A Trip is a safety feature that disables the H9 ASD system and removes the 3-phase power to the motor if a subsystem of the ASD malfunctions or if one or more of the following variables exceed their normal range (time and/or magnitude):

- Current
- Voltage
- Speed
- Temperature
- Torque
- Load

Troubleshooting
The operating conditions at the time of the trip can help determine the cause. The following conditions should be considered when troubleshooting or when contacting Toshiba Customer Support for assistance:

- What trip information is displayed?
- Is this a new installation?
- Has the system ever worked properly, and what are the recent modifications (if any)?
- What is the ASD and Motor size?
- What is the CPU version and revision level?
- What is the EOI version?
- 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 the ASD trip with an unloaded motor?

User Notification Codes
The User Notification codes appear in the top right corner of the Frequency Command screen while the associated function is active. These codes notify the user of active functions that are typically momentary under normal conditions and are only active for the duration of activation. User notification events are not error conditions; they simply convey active system functions to the user.

LED /   Function  /  Description
Atn    Autotune active    Atn indicates that the Autotune function is active.
dbOn    DC Braking    This code indicates that the DC Injection function is being carried out. The display shows db when braking and dbOn when the motor shaft stationary function is active.

On this page, you can find PDF files containing the H9 user manuals. It is crucial to consider the above precautions and troubleshooting tips to ensure the safe and effective use of the H9 ASD. For detailed information, please review the PDF files and contact your Toshiba Sales Representative for any additional support you may need.

+ Toshiba H9 User manual

+ Toshiba H9 Fault index >>

+ Toshiba H9 Fault Codes 1 >>

+ Toshiba H9 Fault Codes 2 >>

+ Toshiba H9 VFD 

+ Toshiba 2 Main page

+ Used VFD Models
+ VFD Main page -

-