Motion 3000ES Escalator Control
58 Manual # 42-02-E001
OIAC.P Power module over current detected from the module output currents
104
Acceleration / deceleration rate is too short.
If seen during autotune, reduce voltage boost Pr 5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
Check feedback device mechanical coupling
Check feedback signals are free from noise
Is motor cable length within limits for frame size?
Reduce the values in speed loop gain parameters - Pr 3.10, Pr 3.11, and Pr 3.12 (closed loop
vector)
OI.br
Braking transistor over current detected: short circuit protection for the braking transistor acti-
vated
4
Check braking resistor wiring
Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
OIbr.P Power module braking IGBT over current
103
Check braking resistor wiring
Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
OldC.P Power module over current detected from IGBT on state voltage monitoring
109
Vce IGBT protection activated
Check motor and cable insulation
O.Ld1 Digital output overload: total current drawn from 24V supply and digital outputs exceeds 200mA
26 Check total load on digital outputs (terminals 24, 25, 26) and +24V rail (terminal 22)
OV DC bus voltage has exceeded the peak level or the maximum continuous level for 30 seconds
2
Increase deceleration ramp (Pr0.04)
Decrease braking resistor value (staying above the minimum)
Check nominal AC supply level
Check for supply disturbances which could cause the DC bus to rise - voltage overshoot after
supply recovery from a notch induced by DC drives
Check motor insulation
See drive manual for additional
OV.P Power module over voltage
106
Increase deceleration ramp (Pr 0.04)
Decrease braking resistor value (staying above minimum)
Check nominal AC supply level
Check for supply disturbances
Check motor insulation
See drive manual for additional
O.SPd Motor speed has exceeded the over speed threshold
7
Increase the over speed trip threshold in Pr 3.08 (closed loop only)
Speed has exceeded 1.2 x P4r 106 or Pr 1.07 (open loop mode)
Reduce the speed loop P gain (Pr 3.10) to reduce the speed overshoot (closed loop only)
PAd Keypad has been removed when the drive is receiving the speed reference from the keypad
34
Fit keypad and reset
Change speed reference selector to select speed reference from another source
Ph AC voltage input phase loss or large supply imbalance detected
32
Ensure all three phases are present and balanced
Check input voltage levels are correct (at full load)
Note: Load level must be between 50 and 100% for the drive to trip under phase loss conditions.
The drive will attempt to stop the motor before this trip is initiated.
Table 20. CT Drive Fault Displays
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