Troubleshooting - Danfoss VLT AQUA Drive FC 202 Installation Manual

Diagnostics and Troubleshoo...
ALARM 315, Auto CT Error
An error was detected while performing auto CT detection.
Contact Danfoss or supplier.
WARNING 316, CT Location Error
The auto CT function could not determine the correct
locations of the CTs.

7.5 Troubleshooting

Symptom
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
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
Intermittent display
frequency drive
MG21B322
Installation Manual
Possible cause
See Table 5.1
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
®
2800
Test using a different LCP
To rule out a problem in the
control wiring, disconnect all
control wiring by removing the
terminal blocks.
Danfoss A/S © 10/2015 All rights reserved.
WARNING 317, CT Polarity Error
The auto CT function could not determine the correct
polarity of the CTs.
WARNING 318, CT Ratio Error
The auto CT function could not determine the correct
primary rating of the CTs.
Test
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] + [
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.
Solution
7
▲ ▼
]/[ ] to adjust
79
7