An issue with the UD90A control PCB may also cause this trip. The trip is likely due to the power PCB in the Drive on Unidrive Sizes 1 to 4. The interconnects between the PCBs should also be checked, as they could also cause a trip.ĭue to an issue with the current feedback on the drive, this trip occurs. UD99 PCB or the UD90A PCB cause the trip on a Unidrive Size 5. There is an issue with either the large option module or the UD90A control PCB if this trip occurs at any other time than the case above.īecause the UD90A control PCB was unable to recognize the power rating of the power PCB it is connected to, this trip occurred. If one of the UD7x large option modules is removed, the trip may be expected. For the HF codes in RED refer to the following page This control board is common to all Unidrive Classics. HF99 Level 1 Crash HF Faults are not recorded in the Drive Historical Fault Log All of the above HF trips in BLUE are typically a result of some sort of hardware failure on the UD90A control PCB. HF95 Software Error (odd address instruction) For more information, please call 80 or email Emerson Industrial Automation: Unidrive Classic HF Trip Codes O Verify the wiring between lower control terminals B2 and B4 o Verify that #6.This document is pertinent to all Unidrive Classic models MRO Electric and Supply has new and refurbished Control Techniques Unidrives available now, along with our other Control Techniques products. If Fd, reduce Pr42=0 and re-try Ensure Pr3 and 4 are not set too fast - set for 20 each Ensure Pr9 is not greater than 0.95 With motor disconnected, set Pr41=Fd and run drive up High OverCurrent detected on drive output-Ĭheck Pr41. If drive runs up ok- megger motor for 1000v If drive trips possibly a faulty transistor. Google CTTN158 & CTTG151 or click for more info o Possible shorted motor or motor lead between drive and motor o Remove motor leads from drive and megger each free motor lead If this happens on power up- remove motor leads and re-try o Remove built in EMC filter the re-try-( Pull tab on SKA-D ) If this happens when you try to Stop or decelerate- o Set #6.01=0 for Coast Stop (if possible ) o Increase Pr4 ( double/triple ) and re-try o Turn on #2.06 and set #2.07=100 or more o Set Pr41= Fd o You may need a dynamic braking resistor OverVoltage occurred For a Fan or Pump App Google CTAN293 or click If this happens when you try to Stop or decelerate- o Increase Pr4 ( double ) and re-try o Turn on #2.06 and set #2.07=100 or more o Set Pr41= Fd If there is an Output Sinewave Filter check this Wiring !!! Possible shorted motor or motor lead between drive and motor Remove motor leads from drive and megger each free motor lead to EarthĦ00-750v for 240vac motors and 1000-1200v for 460v motors. O Suspect AC Power Line disturbances o Possibly install an AC Input Line Choke o A small DB resistor may be required as Pressure Relief o Disconnect built in EMC filter the re-try oĬonsult or Google CTTG136 or click on -> Input Power Problems CTTG143.doc V1.5 1 To Earth 600v for 240vac units and 1200v for 460v units If this happens when motor not running but just powered up. Timed OverCurrent Trip - results typically due to too much load (>100%) for too long of time Hardware Fault- Googe CTTG138 or click here CTTG138.
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