Nidec COMMANDER S100 - Diagnostics; Drive Alarms

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Commander S100 User Guide 103
9 Diagnostics
The keypad display on the drive gives various information about the status of the drive and a full list of these indicators can be found in chapter 5.0
Getting Started. This chapter provides information on the following display indicators:
9.1 Alarms
The drive will produce an alarm under certain conditions to warn the user of a potential fault condition. The drive will continue to run in an alarm
condition, but some alarms will advance to an error if the cause is not removed.
Table 9-1 Drive Alarms
Alarms
Errors
Alarm Description
A0 Motor Overload
Motor Thermal Percentage (P1.22) is larger than 75 % and the current magnitude is larger than the motor rated value.
Recommended Actions:
• Reduce the load on the motor
• Check for a jammed motor shaft
A1 Drive Overload
Drive Thermal Percentage (P1.23) is > 95 %. The alarm will be cleared when Drive Thermal Percentage (P1.23) is < 75 %.
Recommended Actions:
• Reduce load on motor or ambient temperature of the drive.
A2 Auto-tune Active
Will be reset when auto-tune complete.
A3 Limit Switch Active
A digital input has been configured as a limit switch and is active.
Recommended Actions:
• Rotate the motor away from the limit switch. See Sequencer Input and Output Indicators (P1.11) and Digital IO
Indicators (P1.25).
A4 Supply Phase Loss or Imbalance
The drive has detected a supply phase loss or a large imbalance between the phases.
Recommended Actions:
• Check supply fuses to the drive
• Check the voltage on each phase is equal
A5 Analog Input Current Loop Loss
The input current of an analog input (T2 or T4) has fallen below 3 mA. See Analog Input 1 Type (P6.01).
Recommended Actions:
• Check current loop master is powered
• Check the integrity of the wiring
A6 Current Limit Active
The drive is at its current limit.
Recommended Actions:
Increase time set in Acceleration Rate 1 (P2.06)
Reduce the load on the motor
A7 I/O Overload
The current demand on the drive 24 V circuit has exceeded 100 mA.
Recommended Actions:
• Check 24 V output, digital output and 485 port for a current overload condition or potential short