Alarm Word and Extended Status Word
Bit
Hex
Dec
Alarm Word
Warning Word
Extended Status Word
22
00400000
4194304
Serial communication
bus fault
Serial communication bus fault
23
00800000
8388608
24 V Supply Low
24 V Supply Low
24
01000000
16777216
Line failure
Line failure
25
02000000
33554432
1.8 V Supply Low
Current Limit
26
04000000
67108864
Brake Resistor
Low Temp
27
08000000
134217728
Brake IGBT
Voltage Limit
28
10000000
268435456
Option Change
Unused
29
20000000
536870912
Drive Initialized
Unused
30
40000000
1073741824
Safe Stop
Unused
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
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
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.
Warnings and Alarms
VLT
®
HVAC Drive FC 102
126
Danfoss A/S © 08/2014 All rights reserved.
MG11F522
8
8
Summary of Contents for VLT HVAC Drive FC 102
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