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HVAC Drive H300 299
Issue Number: 3
Name Plate Electronic nameplate transfer has failed
176
The Name Plate trip is initiated if an electronic name plate transfer between the drive and the motor has failed. The exact
reason for the trip can be identified from the sub-trip number.
Recommended actions:
• Ensure that the device encoder memory has at least 128 bytes to store the nameplate data
• When writing the motor object (xx.000 = 11000), ensure that the device encoder memory has at least 256 bytes to store
all the nameplate data.
• When transferring between option module and encoder, ensure that the option slot has a feedback option module
installed.
• Check if the encoder has been initialized, Position Feedback Initialized (03.076).
• Verify the encoder wiring.
OHt Brake Braking IGBT over-temperature
101
The OHt Brake over-temperature trip indicates that braking IGBT over-temperature has been detected based on software
thermal model.
Recommended actions:
• Check braking resistor value is greater than or equal to the minimum resistance value
OHt Control Control stage over temperature
23
This OHt Control trip indicates that a control stage over-temperature has been detected. From the sub-trip ‘xxyzz’, the
Thermistor location is identified by ‘zz’.
Recommended actions:
• Check enclosure / drive fans are still functioning correctly
• Check enclosure ventilation paths
• Check enclosure door filters
• Increase ventilation
• Reduce the drive switching frequency
• Check ambient temperature
Trip Diagnosis
Sub-trip Description
1 Not enough memory space to complete the transfer
2 Communication with encoder failed
3 The transfer has failed
4 The checksum of the stored object has failed
Source xx y zz Description
Control system 00 0 01 Control board thermistor 1 over temperature
Control system 00 0 02 Control board thermistor 2 over temperature
Control system 00 0 03 I/O board thermistor over temperature
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