Danfoss VLT HVAC Drive FC 102 Operating Manual page 131

Operating Guide | VLT® HVAC Drive FC 102
Type of fault
Alarm
Trip lock
Status
0.0Hz
Earth Fault [A14]
Auto Remote Trip
Illustration 68: Alarm Example
9.3.2 WARNING 1, 10 Volts Low
Cause
The control card voltage is less than 10 V from terminal 50. Remove some of the load from terminal 50, as the 10 V supply is
overloaded. Maximum 15 mA or minimum 590 Ω.
A short circuit in a connected potentiometer or incorrect wiring of the potentiometer can cause this condition.
Troubleshooting
• Remove the wiring from terminal 50. If the warning clears, the problem is with the wiring. If the warning does not clear, replace the
control card.
9.3.3 WARNING/ALARM 2, Live Zero Error
Cause
This warning or alarm only appears if programmed in parameter 6-01 Live Zero Timeout Function. The signal on 1 of the analog inputs is
less than 50% of the minimum value programmed for that input. Broken wiring or a faulty device sending the signal can cause this
condition.
Troubleshooting
• Check connections on all analog mains terminals.
- Control card terminals 53 and 54 for signals, terminal 55 common.
• Check that the drive programming and switch settings match the analog signal type.
Danfoss A/S © 2018.10
Warning indicator light
Off
On
1(1)
0.000kW
0.0Hz
0
Alarm indicator light
On (flashing)
On (flashing)
0.00A
Maintenance, Diagnostics, and
Troubleshooting
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