Honeywell 3G SmartVFD HVFD3D3A0015 Installation And User Manual page 81

Symptom
Motor is not
reaching
maximum
speed
Motor runs
rough
Motor will not
brake
Open power
fuses or
circuit
breaker trip
Line power
current
imbalance
greater than
3%
76
Possible cause
Frequency limits set
wrong
Reference input signal
not scaled correctly
Possible
overmagnetization
Possible incorrect
settings in the brake
parameters. Possible too
short ramp-down times
Phase-to-phase short
Motor overload
Loose connections
Problem with line power
(See Alarm 4 Mains phase
loss description)
Problem with the
adjustable frequency
drive
Test
Check output limits in 4-
13 Motor Speed High
Limit [RPM], 4-14 Motor
Speed High Limit [Hz]
and 4-19 Max Output
Frequency.
Check reference input
signal scaling in 6-0*
Analog I/O Mode and
parameter group 3-1*
References. Reference
limits in parameter group
3-0* Reference Limits.
Check for incorrect motor
settings in all motor
parameters.
Check brake parameters.
Check ramp time
settings.
Motor or panel has a
short phase-to-phase.
Check motor and panel
phase for shorts.
Motor is overloaded for
the application.
Perform pre-start-up
check for loose
connections
Rotate input power leads
into the adjustable
frequency drive one
position: A to B, B to C, C
to A.
Rotate input power leads
into the adjustable
frequency drive one
position: A to B, B to C, C
to A.
Solution
Program correct settings.
Check settings in
parameter group 1-6*
Load Depen.Setting. For
closed-loop operation,
check settings in
parameter group 20-0*
Feedback.
Check motor settings in
parameter groups
1-2* Motor Data, 1-3*
Addl. Motor Data, and
1-5* Load Indep. Setting.
Check parameter group
2-0* DC Brake and 3-0*
Reference Limits.
Eliminate any short
circuits detected.
Perform start-up test and
verify motor current is
within specifications. If
motor current is
exceeding nameplate full
load current, motor may
run only with reduced
load. Review the
specifications for the
application.
Tighten loose
connections.
If imbalanced leg follows
the wire, it is a power
problem. Check line
power supply.
If imbalance leg stays on
same input terminal, it is
a problem with the unit.
Contact the supplier.
31-00559-01