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Symptom
Possible cause
Test
Solution
Open power fuses or circuit
breaker trip
Phase to phase short.
Motor or panel has a short phase
to phase. Check motor and panel
phase for shorts.
Eliminate any shorts detected.
Motor overload.
Motor is overloaded for the
application.
Perform startup test and verify
motor current is within specifi-
cations. If motor current is
exceeding nameplate full load
current, motor may run only with
reduced load. Review the specifi-
cations for the application.
Loose connections.
Perform pre-startup check for loose
connections.
Tighten loose connections.
Line power current
imbalance greater than 3%
Problem with line power (See
Alarm 4 Mains phase loss
description).
Rotate input power leads into the
adjustable frequency drive one
position: A to B, B to C, C to A.
If imbalanced leg follows the wire,
it is a power problem. Check line
power supply.
Problem with the adjustable
frequency drive.
Rotate input power leads into the
adjustable frequency drive one
position: A to B, B to C, C to A.
If imbalance leg stays on same
input terminal, it is a problem with
the unit. Contact the supplier.
Motor current imbalance
greater than 3%
Problem with motor or motor
wiring.
Rotate output motor leads one
position: U to V, V to W, W to U.
If imbalanced leg follows the wire,
the problem is in the motor or
motor wiring. Check motor and
motor wiring.
Problem with the adjustable
frequency drives.
Rotate output motor leads one
position: U to V, V to W, W to U.
If imbalance leg stays on same
output terminal, it is a problem
with the unit. Contact the supplier.
Acoustic noise or vibration
(e.g., a fan blade is making
noise or vibrations at
certain frequencies)
Resonances, e.g., in the motor/fan
system.
Bypass critical frequencies by using
parameters in parameter group
C-0#.
Check if noise and/or vibration
have been reduced to an
acceptable limit.
Turn off overmodulation in
F-38 Overmodulation
.
Change switching pattern and
frequency in parameter group F-3#.
Increase Resonance Dampening in
H-64 Resonance Dampening
.
Table 11.1
Basic Troubleshooting
AF-650 GP
TM
Design and Installation Guide
DET-767A
11-3
11
11
Summary of Contents for AF-650 GP Series
Page 3: ...Safety AF 650 GPTM Design and Installation Guide DET 767A ...
Page 9: ...Contents AF 650 GPTM Design and Installation Guide DET 767A ...
Page 19: ...Introduction AF 650 GPTM Design and Installation Guide 1 10 DET 767A 1 1 ...
Page 35: ...Installation AF 650 GPTM Design and Installation Guide 2 16 DET 767A 2 2 ...
Page 41: ...Start Up and Functional Tes AF 650 GPTM Design and Installation Guide 3 6 DET 767A 3 3 ...
Page 55: ...About Programming AF 650 GPTM Design and Installation Guide 5 10 DET 767A 5 5 ...
Page 91: ...Application Setup Examples AF 650 GPTM Design and Installation Guide 6 36 DET 767A 6 6 ...
Page 103: ...Status Messages AF 650 GPTM Design and Installation Guide 8 4 DET 767A 8 8 ...
Page 123: ...Warnings and Alarms AF 650 GPTM Design and Installation Guide 10 10 DET 767A 10 0 ...
Page 127: ...Basic Troubleshooting AF 650 GPTM Design and Installation Guide 11 4 DET 767A 11 1 ...
Page 129: ...Terminal and Applicable Wir AF 650 GPTM Design and Installation Guide 12 2 DET 767A 12 2 ...
Page 161: ...Specifications AF 650 GPTM Design and Installation Guide 13 32 DET 767A 13 3 ...