Diagnostics And Troubleshooting; Status Messages; Warning And Alarm Types; Warnings - Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual

Diagnostics and Troubleshoo...

7 Diagnostics and Troubleshooting

7.1 Status Messages

When the frequency converter is in Status mode, status
messages are generated automatically and appear in the
bottom line of the display (see Figure 7.1). Refer to the
®
VLT HVAC Drive FC 102 Programming Guide for detailed
descriptions of the displayed status messages.
Status
799RPM
Auto Remote
Hand Local
O
1 2
1 Operation mode
2 Reference site
3 Operation status
Figure 7.1 Status Display

7.2 Warning and Alarm Types

The adjustable frequency drive monitors the condition of
its input power, output, and motor factors as well as other
system performance indicators. A warning or alarm does
not necessarily indicate a problem internal to the
adjustable frequency drive itself. In many cases, it indicates
failure conditions from:
•
input voltage
•
motor load
•
motor temperature
•
external signals
•
other areas monitored by internal logic
Investigate as indicated in the alarm or warning.

7.2.1 Warnings

A warning is issued when an alarm condition is impending
or when an abnormal operating condition is present and
may result in the adjustable frequency drive issuing an
MG16I322
Operating Instructions
1(1)
7.83A 36.4kW
0.000
53.2%
Ramping
Stop
Running
Jogging
.
.
.
Stand by
3
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alarm. A warning clears by itself when the abnormal
condition is removed.

7.2.2 Alarm Trip

An alarm is issued when the frequency converter is
tripped, that is, the frequency converter suspends
operation to prevent frequency converter or system
damage. The motor coasts to a stop, if the alarm trip is on
the frequency converter side. The frequency converter
logic continues to operate and monitors the frequency
converter status. After the fault condition is remedied,
reset the frequency converter. It is then ready to start
operation again.
A trip can be reset in any of 4 ways:
•
Press [Reset] on the LCP.
•
Digital reset input command.
•
Serial communication reset input command.
•
Auto reset.

7.2.3 Alarm Trip-lock

An alarm that causes the frequency converter to trip-lock
requires that input power is cycled. If the alarm trip is on
the frequency converter side, The motor coasts to a stop.
The frequency converter logic continues to operate and
monitors the frequency converter status. Remove input
power to the frequency converter and correct the cause of
the fault, then restore power. This action puts the
frequency converter into a trip condition as described in
chapter 7.2.2 Alarm Trip and may be reset in any of the 4
ways.
7.3 Warning and Alarm Definitions for
Frequency Converter
The following warning/alarm information 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 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.
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