Basic Start-Up Troubleshooting - Danfoss VLT AutomationDrive FC 302 Instruction Manual

Basic Start-up Troubleshoot...

10 Basic Start-up Troubleshooting

10.1 Start-up and Operation
Symptom
Display dark/No function
10 10
Intermittent display
146
Instruction Manual
Possible cause
Missing input power
Missing or open fuses or circuit
breaker tripped
No power to the LCP
Shortcut on control voltage
(terminal 12 or 50) or at control
terminals
®
Wrong LCP (LCP from VLT 2800
or 5000/6000/8000/ FCD or FCM)
Wrong contrast setting
Display (LCP) is defective
Internal voltage supply fault or
SMPS is defective
Overloaded power supply (SMPS)
due to improper control wiring or
a fault within the adjustable
frequency drive
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
Test
See Table 4.1
See open fuses and tripped circuit
breaker in this table for possible
causes
Check the LCP cable for proper
connection or damage
Check the 24 V control voltage
supply for terminals 12/13 to 20-39
or 10 V supply for terminals 50 to
55
Test using a different LCP
To rule out a problem in the
control wiring, disconnect all
control wiring by removing the
terminal blocks
Solution
Check the input power source
Follow the recommendations
provided
Replace the faulty LCP or
connection cable
Wire the terminals properly
Use only LCP 101 (P/N 130B1124)
or LCP 102 (P/N 130B1107)
▲ ▼
Press [Status] + [ ]/[ ] to adjust
the contrast
Replace the faulty LCP or
connection cable
Contact supplier
If the display stays lit, then the
problem is in the control wiring.
Check the wiring for shorts or
incorrect connections. If the display
continues to cut out, follow the
procedure for display dark
MG37A222