Alarm Indications - Control Techniques Unidrive M400 Quick Start Manual

Trip code
Motor thermistor over-
Thermistor
temperature
User OI ac User OI ac
Trip generated by an onboard
User Prog Trip
user program
User Program On board user program error
User Save User Save error / not completed
Control word watchdog has
Watchdog
timed out
8.1

Alarm indications

In any mode, an alarm is an indication given on the display by alternating the alarm string with the
drive status string display. If an action is not taken to eliminate any alarm except "Auto Tune, Limit
Switch or 24V Backup Lost" the drive may eventually trip. Alarms are not displayed when a
parameter is being edited.
Table 8-2 Alarm indications
Alarm string
Brake resistor overload. Braking Resistor Thermal Accumulator in the drive
Brake Resistor has reached 75.0 % of the value at which the drive will trip. Refer to the Power
Installation Guide.
Motor Protection Accumulator in the drive has reached 75.0 % of the value at
Motor Overload which the drive will trip and the load on the drive is >100 %, reduce motor
current (load). Refer to the Parameter Reference Guide.
Drive over temperature. Percentage Of Drive Thermal Trip Level in the drive is
Drive Overload
greater than 90 %. Refer to the Parameter Reference Guide.
Auto Tune The autotune procedure has been initialized and an autotune in progress.
Limit switch active. Indicates that a limit switch is active and that is causing the
Limit Switch
motor to be stopped.
Low AC Low voltage mode. See Low AC Alarm in the Control User Guide.
Current limit Current limit active. See Current Limit Active in the Control User Guide.
24V backup not present. See 24V Alarm Loss Enable in the Control User
24V Backup Lost
Guide.
56
Condition
The Thermistor trip indicates that the motor thermistor
connected to terminal 14 (digital input 5) on the control
connections has indicated a motor over temperature.
The User OI ac trip is initiated if the output current of the
drive exceeds the trip level set by User Over Current
Trip Level. Refer to the Control User Guide.
This trip can be initiated from within an onboard user
program
An error has been detected in the onboard user program
image.
The User Save trip indicates that an error has been
detected in the user save parameters saved in non-
volatile memory.
The Watchdog trip indicates that the control word has
been enabled and has timed out
Description
Description
Unidrive M400 Control Quick Start Guide
Issue Number: 3