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Diagnostics UL Listing
Unidrive M100 / M101 Control User Guide 87
Issue Number: 1
HF15 Reserved
HF16 Data processing error: RTOS error
The HF16 trip indicates that a RTOS error has occurred. This trip indicates that the control PCB on the drive has failed.
Recommended actions:
• Hardware fault – Contact the supplier of the drive
HF17 Reserved
HF18 Reserved
HF19 Data processing error: CRC check on the firmware has failed
The HF19 trip indicates that the CRC check on the drive firmware has failed.
Recommended actions:
• If this trip occurs - contact the supplier of the drive
HF23 Hardware fault
Recommended actions:
• Hardware fault - Contact the supplier of the drive
It.Ac
Output current overload timed out (I
2
t)
20
The It.Ac trip indicates a motor thermal overload based on the Motor Rated Current (Pr 05.007) and Motor Thermal Time
Constant (Pr 04.015). Pr 04.019 displays the motor temperature as a percentage of the maximum value. The drive will trip
on It.Ac when Pr 04.019 gets to 100 %.
Recommended actions:
• Ensure the load is not jammed / sticking
• Check the load on the motor has not changed
• Ensure the motor rated current is not zero
It.br
Braking resistor overload timed out (I
2
t)
19
The It.br trip indicates that braking resistor overload has timed out. The value in Braking Resistor Thermal Accumulator
(10.039) is calculated using Braking Resistor Rated Power (10.030), Braking Resistor Thermal Time Constant (10.031) and
Braking Resistor Resistance (10.061). The It.br trip is initiated when the Braking Resistor Thermal Accumulator (10.039)
reaches 100 %.
Recommended actions:
• Ensure the values entered in Pr 10.030, Pr 10.031 and Pr 10.061 are correct.
• Check resistor value and power rating.
• If an external thermal protection device is being used and the braking resistor software overload protection is not
required, set Pr 10.030, Pr 10.031 or Pr 10.061 to 0 to disable the trip.
no.PS No power board
236
No communication between the power and control boards.
Recommended actions:
• Hardware fault - Contact the supplier of the drive
O.Ld1 Digital output overload
26
This trip indicates that the total current drawn from the AI Adaptor 24 V or from the digital output has exceeded the limit.
Recommended actions:
• Check total loads on digital outputs and 24 V
• Check control wiring is correct
• Check output wiring is undamaged
O.SPd Motor frequency has exceeded the over frequency threshold
7
In open-loop mode, if the Post-ramp Reference (02.001) exceeds the threshold set in the Over Frequency Threshold
(03.008) in either direction, an O.SPd trip is produced. If Pr 03.008 is set to 0.00 the threshold is then equal to 1.2 x the
value set in Pr 01.006.
Recommended actions:
• Check that a mechanical load is not driving motor
Trip Diagnosis
Sub-trip Reason
1 Digital output or 24 V supply load on control terminal is too high.
2 AI Adaptor 24 V load is too high
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