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202 Unidrive User Guide
www.controltechniques.com Issue Number: 9
Ph AC supply phase loss
32
Loss of an AC supply phase detected by increased ripple on the DC bus.
Ensure all 3 input phases are present and balanced.
N
Load level must be between 50 and 100% for the drive to trip under phase loss conditions. The drive will attempt to stop the motor
before this trip is initiated.
Prc2 UD70> Second processor fault
8
Indicates a trip in the Processor of the UD70 large option module.
Possible causes of failure are as follows:
• If the watchdog feature is enabled (Pr 17.18 = 1), then this trip indicates the WDOG instruction has not been executed, in the
UD70 program, within 200ms of the last execution. See the WDOG command in the UD70 User Guide for more details.
• If the watchdog feature is not enabled (Pr 17.18 = 0), then this trip indicates an operating system failure. Contact the supplier of
the module.
PS Internal power supply fault
5
Remove any option module and attempt a reset (to verify if the trip is caused by the option module).
Check integrity of interface ribbon cables and connections (size 5 only).
Hardware fault - return drive to supplier.
PS n Internal power supply fault in module n (size 5 only)
110 to 117
Check integrity of interface ribbon cables and connections (size 5 only).
Hardware fault - return drive to supplier.
rS Incorrect stator resistance value
33
Incorrect measurement of stator resistance due to the following:
• One or more motor phases disconnected when the measurement was being made
• Motor too small for the drive
If required, set Pr 0.07 (or Pr 5.14) Voltage mode at Ur and enter the value of stator resistance in parameter Pr 5.17.
SCL Serial Communications loss
30
Loss of serial communications when slaving drives or using the universal remote keypad.
Ensure that the communications device is working correctly and the interconnections are correctly made.
SEP UD5x> Small option module fault
9
Indicates a trip in the UD5x small option module.
Possible causes of failure are as follows:
• UD50 Additional I/O> The total current drawn from digital outputs (terminals 48, 49 & 50) has reached the over current threshold.
• UD52 Sin-cos> Encoder power supply overloaded or short circuit (terminals 44 & 45).
• UD53 Resolver> Connections to the UD53 have not been made correctly or a wire break between the resolver and the UD53.
SEP.diS UD5x> Small option module displaced
180
The type of small option module that the drive has been programmed to operate with has been removed or is not fitted correctly.
Perform either of the following:
• Ensure the appropriate type of small option module is correctly fitted
• To operate the drive in the present configuration, set Pr xx.00 at 1000 and press the (STOP/RESET) button.
SEP EC UD52> SINCOS encoder communications failure
35
Communications between
SIN-COS encoder and UD52 small option module have failed. Absolute position information will not be
obtained.
Possible causes of failure are as follows:
• Incorrect serial communications connections (terminals 46, 47).
• DC supply to the encoder is not connected (terminals 44, 45) or has failed.
• Incorrect DC supply voltage for the encoder (Pr 16.15).
After rectifying the fault, remove, and then re-apply the AC supply to the drive in order to obtain absolute position information.
SEP EF UD52> Sincos encoder fault
36 Internal fault within the SINCOS encoder. Contact the encoder or motor supplier.
St GL Spurious trip
34
Unrecognised trip on power-up (size 5 only).
Hardware fault, contact the supplier of the drive.
SuP.LSS Regen supply loss
190
The drive in Regen mode has detected AC supply loss.
Check all three supply phases are present and at the correct level.
th Motor thermistor over temperature
24
The motor thermistor has detected excessive motor temperature or the thermistor or associated wiring is open-circuit.
Set Pr 7.15 = volt and save parameters to disable this function.
thS Motor thermistor short circuit
25
The motor thermistor or wiring is short circuit.
Set Pr 7.15 = volt and save parameters to disable this function.
Trip Diagnosis
NOTE
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