Troubleshooting - Danfoss VLT Ea4 Operating Manual

VLT Ea4 Parallel Drive Modules
Operating Guide
6.9.100 ALARM 425, FPC Update Failure
Cause
This alarm is generated after the control card failed to update the fan power card PUD.

Troubleshooting

• Check the fan power card wiring.
• Replace fan power card.
• Contact supplier.
6.9.101 ALARM 426, FPC Config
Cause
The number of found fan power cards does not match the number of configured fan power cards. See parameter group 15-6* Option
Ident for the number of configured fan power cards.
Troubleshooting
• Check fan power card wiring.
• Replace fan power card.
6.9.102 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.
6.9.103 ALARM 432, Inrush Mode Error
Cause
An Active Inrush card reported the wrong mode. The report value indicates which inrush card reported the alarm.
Troubleshooting
• Check inrush card wiring.
• Replace inrush card.
6.10 Troubleshooting
Table 21: Troubleshooting
Symptom Possible cause
Display dark/No Missing input power.
function
Missing or open fuses.
No power to the LCP.
Short circuit on control volt-
age (terminal 12 or 50) or at
control terminals.
Incompatible LCP (LCP from
VLT 2800 or
®
5000/6000/8000/ FCD or
FCM).
Wrong contrast setting.
64 | Danfoss A/S © 2023.01
Test
Check for loose connections.
See Open power fuses in this table
for possible causes.
Check the LCP cable for proper
connection or damage.
Check the 24 V control voltage sup-
ply for terminal 12/13 to 20–39, or
10 V supply for terminals 50–55.
–
–
Operating the Drive
Solution
Check the input power source.
Follow the recommendations provi-
ded.
Replace the faulty LCP or connection
cable.
Wire the terminals properly.
Use only LCP 101 (P/N 130B1124) or
LCP 102 (P/N. 130B1107).
To adjust the contrast, press [Status] +
[▲]/[▼].
AQ434333248451en-000101 / 130R1286