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Unidrive M100 User Guide 133
Issue Number: 1
r.b.ht Hot rectifier/brake
250 Over-temperature detected on input rectifier or braking IGBT.
Reserved Reserved trips
14-17
11
09
01
94 - 95
103 - 108
191 - 198
168 - 173
238 - 245
23, 39, 99, 176,
205 - 214
223 - 224
These trip numbers are reserved trip numbers for future use. These trips should not be used by the user application
programs.
rS Measured resistance has exceeded the parameter range
33
The rS trip indicates that the measured stator resistance during an autotune test has exceeded the maximum possible
value of Stator Resistance (05.017).
The stationary autotune is initiated using the autotune function (Pr 05.012) or in open loop vector mode (Pr 05.014) on the
first run command after power up in mode 4 (Ur_I) or on every run command in modes 0 (Ur_S) or 3 (Ur_Auto). This trip
can occur if the motor is very small in comparison to the rating of the drive.
Recommended actions:
• Check the motor cable / connections
• Check the integrity of the motor stator winding using a insulation tester
• Check the motor phase to phase resistance at the drive terminals
• Check the motor phase to phase resistance at the motor terminals
• Ensure the stator resistance of the motor falls within the range of the drive model
• Select fixed boost mode (Pr 05.014 = Fd) and verify the output current waveforms with an oscilloscope
• Replace the motor
So.St Soft start relay failed to close, soft start monitor failed
226
The So.St trip indicates that the soft start relay in the drive failed to close or the soft start monitoring circuit has failed.
Recommended actions:
• Hardware fault – Contact the supplier of the drive
St.HF Hardware trip has occurred during last power down
221
The St.HF trip indicates that a hardware trip (HF01 –HF17) has occurred and the drive has been power cycled. The sub-trip
number identifies the HF trip i.e. stored HF.17.
Recommended actions:
• Enter 1299 in Pr mm.000 and press reset to clear the trip
St.OV Stack overflow
12 The sub-trip shows the parameter number.
th.br Brake resistor over temperature
10
The th.br trip is initiated if the hardware based braking resistor thermal monitoring is connected and the resistor overheats.
If the braking resistor is not used, then this trip must be disabled with bit 3 of Action On Trip Detection (10.037) to prevent
this trip.
Recommended actions:
• Check brake resistor wiring
• Check braking resistor value is greater than or equal to the minimum resistance value
• Check braking resistor insulation
tH.Fb Internal thermistor has failed
218
The tH.Fb trip indicates that an internal thermistor has failed. The thermistor location can be identified by the sub-trip
number.
Recommended actions:
• Hardware fault – Contact the supplier of the drive
Trip Diagnosis
Trip Number Description
01 Reserved resettable trip
94 -95 Reserved resettable trip
103 - 108 Reserved resettable trip
191 – 198 Reserved resettable trip
168 - 173 Reserved resettable trip
238 - 245 Reserved non-resettable trip
Source xx y zz
Power system 01 0 Thermistor location defined by zz