Danfoss VLT HVAC Drive FC 102 Instruction Manual page 128

Warnings and Alarms
Alarm Word and Extended Status Word
Bit Hex
22 00400000
23 00800000
24 01000000
25 02000000
26 04000000
27 08000000
28 10000000
29 20000000
30 40000000
Table 8.3 Description of Alarm Word, Warning Word and Extended Status Word
The alarm words, warning words and extended status
words can be read out via serial bus or optional serial
communication bus for diagnosis. See also
parameter 16-90 Alarm Word, parameter 16-92 Warning Word
8 8
and parameter 16-94 Ext. Status Word.
The warning/alarm information in this chapter defines 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 from terminal 50 is <10 V.
Remove some of the load from terminal 50, as the 10 V
supply is overloaded. Max. 15 mA or minimum 590 Ω.
A short circuit in a connected potentiometer or improper
wiring of the potentiometer can cause this condition.
Troubleshooting
•
Remove the wiring from terminal 50.
•
If the warning clears, the problem is with the
customer 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 signals
being sent by a faulty device causes this condition.
Troubleshooting
•
Check 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
126
®
VLT HVAC Drive FC 102
Dec Alarm Word
4194304 Serial communication
bus fault
8388608 24 V Supply Low
16777216 Line failure
33554432 1.8 V Supply Low
67108864 Brake Resistor
134217728 Brake IGBT
268435456 Option Change
536870912 Drive Initialized
1073741824 Safe Stop
Danfoss A/S © 08/2014 All rights reserved.
Warning Word
Serial communication bus fault
24 V Supply Low
Line failure
Current Limit
Low Temp
Voltage Limit
Unused
Unused
Unused
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 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 in case
of a fault in the input rectifier 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 depends 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 depends 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 some time.
Troubleshooting
•
Connect a brake resistor.
•
Extend the ramp time.
•
Change the ramp type.
Extended Status Word
MG11F522