www.usmotors.com
42
ID300/302 Integrated Motor Drive |
Diagnostics
Trip Code
Condition
Description
Motor Too Hot
Output current overload
timed out (I2t)
This trip indicates a motor thermal overload based on the
output current and motor thermal time constant. The drive
will trip on Motor Too Hot when the accumulator gets to
100 %. This can occur when:
•
There is excessive mechanical load, ensure the
load is not jammed / sticking.
•
Check the load on the motor has not changed.
•
Ensure the motor rated current is not zero.
OI ac
Instantaneous output over
current detected. This trip
cannot be reset until 10s
after the trip was initiated
The instantaneous drive output current has exceeded the
set limit. Possible explanations:
•
Acceleration/deceleration rate too low.
•
If seen during autotune voltage boost too low.
•
Possible short circuit on the output cabling.
•
Possible integrity issue of the motor insulation.
•
Values in the current loop gain parameters too
high.
Over Speed
Motor frequency has
exceeded the over
frequency threshold
Excessive motor speed (typically caused by mechanical
load driving the motor).
Over Volts
DC bus voltage has
exceeded the peak level or
maximum continuous level
for 15 seconds
This trip indicates that the DC bus voltage has exceeded
the maximum limit. Possible solutions:
•
Increase Deceleration Rate (Pr 00.004).
•
Check nominal AC supply level.
•
Check for supply disturbances which could cause
the DC bus to rise.
•
Check motor insulation using an insulation tester.
Phase Loss
Supply phase loss
The drive has detected an input phase loss or large
supply imbalance.
Thermistor
Motor thermistor over-
temperature
The Thermistor trip indicates that the motor thermistor
connected to Terminal 4 (ADI2) on the control
connections has indicated a motor over temperature.
