Diagnostics And Protective Features; Trip Codes - Control Techniques Commander SE Series User Manual

8

Diagnostics and Protective Features

Do not attempt to carry out internal repairs. Return a faulty Drive to the
supplier for repair.
WARNING
The following protective features are incorporated within the Commander SE Drive.
They are placed in order of Trip number which is the figure that is read back through
the serial comms.
8.1

Trip codes

When a trip condition occurs, the left hand display will show the legend
right hand display flashes one of the trip codes given in Table 8.1.
Table 8.1 Trip Codes
Trip Code Trip
Number
UU 1
DC link under voltage
OU 2
DC link over voltage
OI.AC** 3
AC instantaneous over current trip
OI.br** 4
Overcurrent on braking IGBT
Et 6
External trip
O.SP 7
Over speed
tunE 18 Auto-tune failure
It.br 19
Ixt on braking resistor
It.AC 20 Motor overload on current x time
Oht1 21 Overheat
Oht2† 22 Overheat (heatsink thermistor)
th 24 Over temperature (Motor thermistor) Excessive motor temperature
O.Ld1* 26 +24V or digital output overload
cL 28
Current loop loss on terminal 5
SCL 30 User serial communications
watchdog failure
EEF 31
Failure of internal EEPROM
Commander SE User Guide
Issue Number 5
Condition
Low AC supply voltage
Low DC link voltage when supplied by external
DC power supply
Excessive inertia in the machine during
deceleration
Deceleration rate set too fast for inertia of
machine
Insufficient ramp times
Phase to phase or phase to earth short-circuit at
the Drive output
Drive requires autotuning to motor (see
parameter 38)
Excessive current in braking resistor
Braking resistor value too small
(Does not apply to Size 1 units)
External trip terminal opened (when
programmed)
Excessive motor speed (typically caused by the
mechanical load driving the motor)
Motor loaded or no motor connected
Excessive braking resistor energy
(Does not apply to Size 1 units)
Too much mechanical load
Overheat thermal model
Temperature exceeds 95°C (203°F)
Excessive load or short circuit on +24V output
Input current less than 3mA when 4-20 or 20-4
modes used
Failure of serial communications between Drive
and master
Possible loss of parameter values
Corruption due to severe electrical noise
Set default parameters (see parameter 29)
tr whilst the
Possible Cause
57