7-16 Trips and Fault Finding
DC590+ DRV Series DC Digital Drive
Trip Message and Meaning Possible Reason for Trip Corrective Action
Blower motor starter tripped Blower Motor Protector Option (if fitted) : remove the
fault and press the Start button on the Option to reset
Motor operating at low speed/high
current
TEFC motors do not generate sufficient flow of air to
provide sustained full load at low speed. Check gearing
and/or reduce mechanical load. Use a higher power
motor or provide additional cooling method
independent of motor RPM
Drive miscalibrated Check motor armature and current calibration matches
motor nameplate information
NOTE The motor must be allowed to
cool in order to re-start the
drive.
Field miswired Check motor field wiring matches motor wiring diagram
for field supply
Drive miscalibrated for motor
armature voltage
Check armature voltage calibration matches motor
nameplate information
Drive miscalibrated for field voltage
ratio (voltage model) or field current
(current or field weakening model)
Check field calibration of drive. Check field current not
exceeding motor nameplate data
Armature open circuit Check armature wiring. Check armature fuse F7
(regenerative units only)
Motor maximum speed set incorrectly
causing armature voltage to exceed
nameplate rating
Change maximum speed parameter to match the
nameplate rating
OVER VOLTS (VA)
Motor armature voltage has exceeded
120% of rated volts
Alarm time delay : 1 second
Field weakening parameters set
incorrectly if using an extended speed
range motor
Change field weakening parameters for use with an
extended speed range motor - refer to Chapter 4.
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