Basic Troubleshooting; Start Up And Operation - Danfoss VLT FC 322 Instruction Manual

Basic Troubleshooting

VLT® Automation VT Drive FC 322 D-Frame Instruction Manual
9 Basic Troubleshooting

9.1 Start Up and Operation

Symptom 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
Display dark / No function
®
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 frequency
Intermittent display
converter
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Test Solution
See Table 3.1. Check the input power source.
See open fuses and tripped circuit Follow the recommendations
breaker in this table for possible provided
causes.
Check the LCP cable for proper Replace the faulty LCP or
connection or damage. connection cable.
Check the 24 V control voltage Wire the terminals properly.
supply for terminal 12/13 to 20-39
or 10 V supply for terminal 50 to
55.
Use only LCP 101 (P/N 130B1124)
or LCP 102 (P/N 130B1107).
▲ ▼
Press [Status] + [ ]/[ ] to adjust
the contrast.
Test using a different LCP. Replace the faulty LCP or
connection cable.
Contact supplier.
To rule out a problem in the If the display stays lit, then the
control wiring, disconnect all problem is in the control wiring.
control wiring by removing the Check the wiring for shorts or
terminal blocks. incorrect connections. If the display
continues to cut out, follow the
procedure for display dark.
9 9
9-1