Danfoss vlt FC 102 Operating Guide

7.6.90 WARNING 251, New Typecode
Cause
The power card or other components have been replaced, and the typecode has changed.
Troubleshooting
Reset the drive for normal operation.
7.7 Troubleshooting
Table 42: Troubleshooting
Symptom
Possible cause
Test
Solution
Display dark/No
function
Missing input power
See 4.9 Installation Check List.
Check the input power source.
Missing or open fuses or cir-
cuit breaker tripped.
See Open fuses and tripped circuit
breaker in this table for possible
causes.
Follow the recommendations provi-
ded.
No power to the LCP.
Check the LCP cable for proper con-
nection or damage.
Replace the faulty LCP or connec-
tion cable.
Shortcut on control voltage
(terminal 12 or 50) or at con-
trol terminals.
Check the 24 V control voltage sup-
ply for terminals 12/13 to 20-19 or
10 V supply for terminals 50 to 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.
Display (LCP) is defective.
Test using a different LCP.
Replace the faulty LCP or connec-
tion cable.
Internal voltage supply fault
or SMPS is defective.
Contact supplier.
Intermittent dis-
play
Overloaded power supply
(SMPS) due to improper con-
trol wiring or a fault within
the drive.
To rule out a problem in the control
wiring, disconnect all control wiring
by removing the terminal blocks.
If the display stays lit, the problem is
in the control wiring. Check the wir-
ing for short circuits or incorrect
connections. If the display continues
to cut out, follow the procedure for
display dark.
Motor not run-
ning
Service switch open or miss-
ing motor connection.
Check if the motor is connected
and the connection is not interrup-
ted (by a service switch or other de-
vice).
Connect the motor and the service
switch.
No mains power with 24 V DC
option card.
If the display is but no output,
check that mains power is applied
to the drive.
Apply mains power to run the unit.
LCP Stop
Check if [Off] has been pressed.
Press [Auto On] or [Hand On] (de-
pending on operation mode) to run
the motor.
Missing start signal (Standby)
Check parameter 5-10 Terminal 18
Digital Input for correct setting for
terminal 18 (use default setting).
Apply a valid start signal to start the
motor.
AQ267037536117en-000101 / 130R008382 | Danfoss A/S © 2023.09
Diagnostics and Troubleshooting
VLT HVAC Drive FC 102
Operating Guide

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English