7.3 Warnings and Alarm Denitions -
Adjustable Frequency Drive
The following warning/alarm information denes each
warning/alarm condition, provides the probable cause for
the condition, and details a remedy or troubleshooting
procedure.
WARNING 1, 10 Volts low
The control card voltage is <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.
WARNING/ALARM 2, Live zero error
This warning or alarm only appears if programmed in
parameter 6-01 Live Zero Timeout Function. The signal on
one 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 the connections on all the analog input
terminals.
- Control card terminals 53 and 54 for
signals, terminal 55 common.
- MCB 101 terminals 11 and 12 for signals,
terminal 10 common.
- MCB 109 terminals 1, 3, 5 for signals,
terminals 2, 4, 6 common.
•
Check that the adjustable frequency drive
programming and switch settings match the
analog signal type.
•
Perform an input terminal signal test.
WARNING/ALARM 3, No motor
No motor has been connected to the output of the
adjustable frequency drive.
WARNING/ALARM 4, Mains phase loss
A phase is missing on the supply side, or the line voltage
imbalance is too high. This message also appears for a
fault in the input
rectier on the adjustable frequency
drive. Options are programmed in parameter 14-12 Function
at Mains Imbalance.
Troubleshooting
•
Check the supply voltage and supply currents to
the adjustable frequency drive.
WARNING 5, DC link voltage high
The intermediate circuit voltage (DC) is higher than the
high-voltage warning limit. The limit is dependent on the
adjustable frequency drive voltage rating. The unit is still
active.
WARNING 6, DC link voltage low
The intermediate circuit voltage (DC) is lower than the low-
voltage warning limit. The limit is dependent on the
adjustable frequency drive voltage rating. The unit is still
active.
WARNING/ALARM 7, DC overvoltage
If the intermediate circuit voltage exceeds the limit, the
adjustable frequency drive trips after a time.
Troubleshooting
•
Connect a brake resistor.
•
Extend the ramp time.
•
Change the ramp type.
•
Activate the functions in parameter 2-10 Brake
Function.
•
Increase parameter 14-26 Trip Delay at Inverter
Fault.
•
If the alarm/warning occurs during a power sag,
use kinetic backup (parameter 14-10 Mains
Failure).
WARNING/ALARM 8, DC undervoltage
If the DC link voltage drops below the undervoltage limit,
the adjustable frequency drive checks if a 24 V DC backup
supply is connected. If no 24 V DC backup supply is
connected, the adjustable frequency drive trips after a
xed time delay. The time delay varies with unit size.
Troubleshooting
•
Make sure that the supply voltage matches the
adjustable frequency drive voltage.
•
Perform an input voltage test.
•
Perform a soft charge circuit test.
WARNING/ALARM 9, Inverter overload
The adjustable frequency drive has run with more than
100% overload for too long and is about to cut out. The
counter for electronic thermal inverter protection issues a
warning at 98% and trips at 100%, while giving an alarm.
The adjustable frequency drive cannot be reset until the
counter is below 90%.
Troubleshooting
•
Compare the output current shown on the LCP
with the adjustable frequency drive rated current.
•
Compare the output current shown on the LCP
with the measured motor current.
Status Messages Installation Manual
MG37A322 Danfoss A/S © Rev. 04/2015 All rights reserved. 69
7 7
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