Danfoss vlt FC 102 User Guide

6.6 Troubleshooting
Symptom Possible cause Test Solution
Display is dark
or not
functioning
Input power is missing
See the pre-start check list in the VLT
®
Parallel Drive
Modules Installation Instructions.
Check the input power source.
Fuses are missing or open, or
the circuit breaker has tripped
See Open power fuses or tripped circuit breaker in this
table for possible causes.
Follow the provided recommen-
dations.
No power to the LCP Check the LCP cable for a faulty connection or
damage.
Replace the faulty LCP or
connection cable.
Short circuit on the control
voltage (terminal 12 or 50) or
at control terminals
Check the 24 V control voltage supply for terminals
12/13 to 20–39. Check 10 V supply for terminals 50–
55.
Wire the terminals properly.
Incompatible LCP (LCP from
VLT
®
2800 or 5000/6000/8000/
FCD or FCM)
Use only LCP 101 (P/N 130B1124)
or LCP 102 (P/N 130B1107).
Wrong contrast setting
Press [Status] + [
▲
]/[
▼
] to adjust
the contrast.
Defective display (LCP) Test using a dierent LCP. Replace the faulty LCP or
connection cable.
Faulty internal voltage supply
or defective SMPS
Contact a Danfoss supplier.
Intermittent
display
Overloaded supply (SMPS) due
to improper control wiring or a
fault within the drive system
To rule out a problem in the control wiring,
disconnect all control wiring by removing the
terminal blocks.
If the display stays lit, then the
problem is in the control wiring.
Check the wiring for short circuits
or incorrect connections. If the
display continues to cut out,
follow the procedure for Display is
dark or not functioning.
Motor is not
running
Service switch is open or the
motor connection is missing
Check that the motor is connected and that the
connection is not interrupted (by a service switch or
other device).
Connect the motor and then
check the service switch.
No mains power with the 24 V
DC option card
If the display is functioning but there is no output,
check that mains power is applied to the drive
system.
Run the unit by applying mains
power.
LCP stop Check if [O] has been pressed on the LCP. Press [Auto On] or [Hand On]
(depending on the operating
mode) to run the motor.
Start signal is missing (Standby) Check parameter 5-10 Terminal 18 Digital Input for the
correct setting for terminal 18 (use the default
setting).
Start the motor by applying a
valid start signal.
Motor coast signal is active
(Coasting)
Check parameter 5-12 Terminal 27 Digital Input for the
correct setting for terminal 27 (use the default
setting).
Apply 24 V on terminal 27 or
program this terminal to No
operation.
Wrong reference signal source Check reference signal:
•
Local, remote, or bus reference?
•
Is preset reference active?
•
Is terminal connection correct?
•
Is scaling of terminals correct?
•
Is reference signal available?
Program the correct settings.
Check parameter 3-13 Reference
Site. Set the preset reference
active in parameter group 3-1*
References. Check for correct
wiring. Check the terminals for
scaling. Check the reference
signal.
Maintenance, Diagnostics, a...
VLT
®
Parallel Drive Modules
48 Danfoss A/S © 08/2017 All rights reserved. MG37L202
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Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English