Commander SK Getting Started Guide 39
Issue Number: 1 www.controltechniques.com
Safety
Information
Rating
Data
Mechanical
Installation
Electrical
Installation
Keypad
and Display
Parameters
Quick Start
Commissioning
Diagnostics
Options
Parameter
List
UL Listing
Information
8 Diagnostics and Protective Features
* The Enable/Reset terminal will not reset an O.Ld1 trip. Use the Stop/Reset key.
** These trips cannot be reset for 10 seconds after they occur.
Do not attempt to carry out internal repairs. Return a faulty drive to the supplier for repair.
WARNING
Trip code
Condition Possible cause
UU DC bus under voltage
Low AC supply voltage
Low DC bus voltage when supplied by an external DC power
supply
OV DC bus over voltage Deceleration rate set too fast for inertia off machine
OI.AC**
Drive output instantaneous over
current
Insufficient ramp times
Phase to phase or phase to ground short circuit on the drives
output
Drive requires autotuning to the motor
Motor or motor connections changed, re-autotune drive to motor
OI.br**
Braking resistor instantaneous over
current
Excessive braking current in braking resistor
Braking resistor value too small
O.SPd Over speed
Excessive motor speed (typically caused by mechanical load
driving the motor)
tunE
Auto tune stopped before
completion
Run command removed before autotune complete
It.br
I
2
t on braking resistor
Excessive braking resistor energy
It.AC
I
2
t on drive output current
Excessive mechanical load
High impedance phase to phase or phase to ground short
circuit at drive output
Drive requires re-autotuning to motor
O.ht1
IGBT over heat based on drives
thermal model
Overheat software thermal model
O.ht2 Over heat based on drives heatsink Heatsink temperature exceeds allowable maximum
th Motor thermistor trip Excessive motor temperature
O.Ld1* User +24V or digital output overload Excessive load or short circuit on +24V output
cL1
Analog input 1 current mode,
current loss
Input current less then 3mA when 4-20 or 20-4mA modes
selected
SCL
Serial communications loss time-out
Loss of communication when drive is under remote control
EEF Internal drive EEPROM failure
Possible loss of parameter values
(set default parameters (see Pr 29 on page 27))
PH
Input phase imbalance or input
phase loss
One of the input phases has become disconnected from the
drive (applies to 200/400V three phase drives only, not dual
rated drives)
rS
Failure to measure motors stator
resistance
Motor too small for drive
Motor cable disconnected during measurement
C.Err SmartStick data error Bad connection or memory corrupt within SmartStick
C.dAt SmartStick data does not exist New/empty SmartStick being read
C.Acc SmartStick read/write fail Bad connection or faulty SmartStick
C.rtg SmartStick/drive rating change
Already programmed SmartStick read by a drive of a different
rating
O.cL Overload on current loop input Input current exceeds 25mA
HFxx trip Hardware faults
Internal drive hardware fault (see Commander SK Advanced
User Guide)
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