SEW MOVITRAC LTP series, Руководство по эксплуатации

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Operating Instructions – MOVITRAC® LTP
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7
Fault codes and history
Operation and Service
7.2 Fault codes and history
7.2.1 Troubleshooting
Fault finding chart
7.2.2 Fault history
The parameter P1-13 in the parameter mode holds a record of the most recent 4 trips
and / or events that have occurred. Each trip will be displayed in abbreviated text, with
the most recent trip being displayed first (on entering into the value of P1-13).
Whenever a new trip occurs, this is entered at the top of the list and the other trips move
down. The oldest trip will then be removed from the trip log.
Symptom Cause and Solution
Overload or over-current trip on unloaded motor
during acceleration Check Star / Delta terminal connection in motor. Rated operating voltage of drive
and motor should match. The Delta connection always gives the lower voltage rating
of a dual voltage motor.
Overload or over-current – motor does not spin Check for locked rotor. Check that the mechanical brake is released (if fitted).
Drive will not enable – display remains on "StoP" Check that the hardware enable signal is applied to digital input 1.
Ensure that the User +24 V output voltage (between terminals 5 and 7) is correct.
If not, check wiring to user terminal strip.
Check P1-12 for terminal / keypad mode.
If keypad mode selected, press the <start> button. Check that supply voltage is
within specification.
Drive runs incorrectly when in vector mode Ensure that the motor name plate data has been entered into P1-07, P1-08, P1-09
before the parameter auto-tune function has been carried out.
Set P4-02 = 1 to carry out auto-tune.
In very cold ambient conditions, drive will not
power up If the ambient temperature is less than –10 °C, the drive may not power up. Ensure
that a local heating source keeps the ambient above 0 °C in these conditions.
Speed limit or rated frequency parameters
cannot be set above 250 Hz, 500 Hz or 1000 Hz The maximum output motor frequency is limited by the switching frequency.
Ensure that P2-24 is at least 16 times greater than the required motor output fre-
quency before setting the required maximum or rated output frequency parameters.
Extended menus cannot be accessed Ensure that P1-14 is set to the extended access code. This is “101” unless the code
in P2-37 has been changed by the user.
NOTE
If the most recent trip in the trip log is an "under-voltage" trip, further under-voltage trips
will not be entered into the trip log. This is to ensure that the trip log does not fill up with
under-voltage trips which occur naturally every time the MOVITRAC
®
LTP is turned off.
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