Emerson Commander SK, Getting Started Manual

Page: 47 / 54

Commander SK Getting Started Guide
47
Issue Number: 9 www.controltechniques.com
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8 Diagnostics
* The Enable/Reset terminal will not reset an O.Ld1 trip. Use the Stop/Reset key.
Do not attempt to carry out internal repairs. Return a faulty drive to the supplier for repair.
WARNING
Trip code Condition Possible cause
UV
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 the inertia of the machine
Mechanical load driving the motor
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
O.ht3
Drive over-heat based on thermal
model
Overheat software thermal model
cL1
Analog input 1 current mode,
current loss
Input current less than 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 trip
Possible loss of parameter values
(set default parameters (see Pr
29 on page 35))
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
CL.bt
Trip initiated from the control word Control word has initiated a trip
O.ht4
Power module rectifier over
temperature Power module rectifier temperature exceeds allowable
maximum
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 )