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Unidrive M Regen Design Guide 315
Issue Number: 4
12 Diagnostics
The keypad display on the drive gives various information about the
status of the drive. The keypad display provides information on the
following categories:
• Trip indications
• Alarm indications
• Status indications
12.1 Status modes (Keypad and LED status)
Figure 12-1 Keypad status modes
1. Drive healthy status
2. Trip status
3. Alarm status
Figure 12-2 Location of the status LED
1. Non flashing: Normal status
2. Flashing: Trip status
12.2 Trip indications
The output of the drive is disabled under any trip condition so that the
drive stops controlling the motor. If the motor is running when the trip
occurs it will coast to a stop.
During a trip condition, where a KI-Keypad is being used, the upper row
of the display indicates that a trip has occurred and the lower row of the
keypad display will display the trip string. Some trips have a sub-trip
number to provide additional information about the trip. If a trip has a
sub-trip number, the sub-trip number is flashed alternately with the trip
string unless there is space on the second row for both the trip string and
the sub-trip number in which case both the trip string and sub-trip
information is displayed separated by a decimal place.
The back-light of the KI-Keypad display will also flash during a trip
condition. If a display is not being used, the drive LED Status indicator will
flash with 0.5 s duty cycle if the drive has tripped. Refer to Figure 12-2.
Trips are listed alphabetically in Table 12-3 based on the trip indication
shown on the drive display. Alternatively, the drive status can be read in
Pr 10.001 'Drive healthy' using communication protocols. The most
recent trip can be read in Pr 10.020 providing a trip number. It must be
noted that the hardware trips (HF01 to HF20) do not have trip numbers.
The trip number must be checked in Table 12-3 to identify the specific
trip.
Example
1. Trip code 2 is read from Pr 10.020 via serial communications.
2. Checking Table shows Trip 2 is an Over Volts trip.
3. Look up Over Volts in Table 12-3.
4. Perform checks detailed under Diagnosis.
Users must not attempt to repair a drive if it is faulty, nor
carry out fault diagnosis other than through the use of the
diagnostic features described in this chapter.
If a drive is faulty, it must be returned to an authorized
distributor for repair.
Keypad
display
Comms
code
No. Trip
2
Over Volts
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