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94 Unidrive M100 / M101 Control User Guide
Issue Number: 1
The trips can be grouped into the following categories. It should be noted that a trip can only occur when the drive is not tripped or is already tripped
but with a trip with a lower priority number.
Table 11-3 Trip categories
11.5 Internal / Hardware trips
Trips {HF01} to {HF23} are internal faults that do not have trip numbers except HF08, HF11, HF12 and HF18. If one of these trips occurs, the main
drive processor has detected an irrecoverable error. All drive functions are stopped and the trip message will be displayed on the drive keypad. If a
non permanent trip occurs this may be reset by power cycling the drive. On power up after it has been power cycled the drive will trip on St.HF (the
sub-trip number indicates the HF fault code). Enter 1299 in mm.000 to clear the Stored HF trip.
tH.Fb Internal thermistor has failed
218
The tH.Fb trip indicates that an internal thermistor has failed in the drive (i.e. open circuit or short circuit). The thermistor
location can be identified by the sub-trip number.
Recommended actions:
• Hardware fault – Contact the supplier of the drive
tun.S Autotune test stopped before completion
18
The drive was prevented from completing an autotune test, because either the drive enable or the drive run were removed.
Recommended actions:
• Check the drive enable signal (Terminal 11) was active during the autotune
• Check the run command was active in digtal input 3 or 4 state (Pr 08.003 or Pr 08.004) during the autotune.
tun.1 Required speed could not be reached
11
The drive has tripped during an autotune. The cause of the trip can be identified from the sub-trip number.
Recommended actions:
• Ensure the motor is free to turn i.e. mechanical brake is released
U.OI User OI ac
8 The U.OI trip is initiated if the output current of the drive exceeds the trip level set by User Over Current Trip Level (04.041).
U.S User Save error / not completed
36
The U.S trip indicates that an error has been detected in the user save parameters saved in non-volatile memory. For
example, following a user save command, If the power to the drive was removed when the user parameters were being
saved.
Recommended actions:
• Perform a user save in Pr mm.000 to ensure that the trip doesn’t occur the next time the drive is powered up.
• Ensure that the drive has enough time to complete the save before removing the power to the drive.
Trip Diagnosis
Source xx y zz
Power system 01 0 Thermistor location defined by zz
Sub-trip Reason
2 The motor did not reach the required speed during rotating autotune.
Priority Category Trips Comments
1 Internal faults HFxx
These indicate internal problems and cannot be reset. All drive features
are inactive after any of these trips occur.
1 Stored HF trip {St.HF}
This trip cannot be cleared unless 1299 is entered into Parameter
(mm.000) and a reset is initiated.
2 Non-resettable trips Trip numbers 218 to 247 These trips cannot be reset.
3 Volatile memory failure {EEF}
This can only be reset if Parameter mm.000 is set to 1233 or 1244, or if
Load Defaults (11.043) is set to a non-zero value.
4 NV Media Card trips
Trip numbers 174, 175
and 177 to 188
These trips are priority 5 during power-up.
4 Internal 24V {PSU}
5
Trips with extended reset
times
{OI.AC}, {OI.br}, and
FAn.F.
These trips cannot be reset until 10 s after the trip was initiated.
5
Phase loss and d.c.
jumper power circuit
protection
{PH.Lo} and
{Oh.dc}
The drive will attempt to stop the motor before tripping if a {PH.Lo} trip
occurs unless this feature has been disabled (see Action On Trip
Detection (10.037). The drive will always attempt to stop the motor before
tripping if an {Oh.dc} occurs.
5 Standard trips All other trips
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