Danfoss VLT AQUA Drive FC 202, Руководство по эксплуатации

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8.4.100 ALARM 427, FPC Supply
Cause
Supply voltage fault (5 V, 24 V, or 48 V) on fan power card is detected.
Troubleshooting
• Check fan power card wiring.
• Replace fan power card.
8.5 Troubleshooting
Table 44: Troubleshooting
Symptom Possible cause Test Solution
Display dark/No
function Missing input power. Check for loose connections. Check the input power source.
Missing or open fuses. See Open power fuses in this table
for possible causes.
Follow the recommendations provided.
No power to the LCP. Check the LCP cable for proper
connection or damage. Replace the faulty LCP or connection
cable.
Short circuit on control volt-
age (terminal 12 or 50) or at
control terminals. Check the 24 V control voltage
supply for terminal 12/13 to 20–39,
or 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. – To adjust the contrast, press [Status] +
[
▲
]/[
▼
].
Display (LCP) is defective. Test using a different LCP. Replace the faulty LCP or connection
cable.
Internal voltage supply fault
or SMPS is defective. – Contact supplier.
Intermittent dis-
play Overloaded supply (SMPS)
due to improper control wir-
ing or a fault within the AC
drive. To rule out a problem in the con-
trol wiring, disconnect all control
wiring by removing the terminal
blocks. If the display stays lit, 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\No function .
Maintenance, Diagnostics, and
Troubleshooting
Operating Guide | VLT® AQUA Drive FC 202
AQ275652274277en-000101 / 130R0708| 127
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