Heatsink Trip; Thermistor; Over Volts (Va) - Parker 590+ series Product Manual

7-14 Trips and Fault Finding
Trip Message and Meaning

HEATSINK TRIP

The Drive heatsink temperature is too high

THERMISTOR

The motor temperature is too high

OVER VOLTS (VA)

Motor armature voltage has exceeded 120% of rated
volts
SPEED FEEDBACK
The difference between speed feedback and
armature voltage feedback is greater than the
SPDFBK ALM LEVEL parameter value
If FLD WEAK ENABLE parameter is enabled, speed
feedback is less than 10% when in the field
weakening region
Possible Reason for Trip
The ambient air temperature is too high
Poor ventilation or spacing between Drives
Fan failure, check fuse on power board, wrong rotation (models above 70A bridge
rating)
Blocked ventilation slots
Clogged air filters
Excessive armature current - nominal armature current on motor nameplate
should be checked against the current calibration for the Drive.
Note:
The stack must be allowed to cool in order to re-start the Drive.
Alarm time delay : 0.5 seconds
Inadequate ventilation
Blower failure -check for direction, clogged air filters (models above 70A bridge
rating)
Excessive armature current - check nominal armature current on nameplate
against current calibration)
Note:
The motor must be allowed to cool in order to re-start the Drive.
Alarm time delay : 5 seconds
Loose armature connection
Badly adjusted field voltage setting
Badly adjusted field current loop
Badly adjusted field-weakening bemf loop
Badly adjusted speed loop
Alarm time delay : 1 second
Analog tacho feedback polarity incorrect (terminals G3 and G4)
The ENCODER SIGN parameter's polarity is incorrect
Disconnection of wiring, including fibre optics
Armature voltage calibration has not been suitably reduced when running at
reduced field currents
Tachogenerator failure
Tachogenerator coupling failure
Alarm time delay : 0.125 seconds
DC590+ Series DC Digital Drive