Service manual

TRIPLOCK (DISC> MAINS): Requires that the main AC input
power to the frequency converter must be disconnected
long enough for the display to go blank. The fault
condition must be removed and power reapplied.
Following power up, the fault indication changes to TRIP
(RESET) and allow for manual, digital, or serial bus reset.
Line 2 displays alarm and the associated number while line
3 identifies the alarm in plain language.
NOTE
When exchanging the unit which requires fire mode
activation, carefully check that the Fire Mode parameters
•
24-00 FM Function
•
24-05 FM Preset Reference
•
24-09 FM Alarm Handling
are correctly transferred into the exchange unit.
4.6.2 Warnings
During a warning, the frequency converter remains
operational, although the warning flashes for as long as
the condition exists. The frequency converter may,
however, reduce the warning condition. For example, if the
warning displayed were Torque Limit (Warning 12), the
frequency converter would be reducing speed to
compensate for the over-current condition. In some cases,
if the condition is not corrected or worsens, an alarm
condition is activated and the frequency converter output
to the motor terminated. Line 1 identifies the warning in
plain language and line 2 identifies the warning number.
4.6.3
Warning And Alarm Messages
The LEDs on the front of the frequency converter and a
code in the display signal a warning or an alarm.
A warning indicates a condition that may require attention
or a trend that may eventually require attention. A
warning remains active until the cause is no longer
present. Under some circumstances, motor operation may
continue.
A trip is the action when an alarm has appeared. The trip
removes power to the motor. It can be reset after the
condition has been cleared by pressing [Reset], or through
a digital input (parameter group 5-1* Digital Inputs). The
event that caused an alarm cannot damage the frequency
converter or cause a dangerous condition. Alarms must be
reset to restart operation once their cause has been
rectified.
The reset can be done in three ways:
•
Press [Reset]
•
A digital reset input
•
Serial communication/optional fieldbus reset
signal
NOTE
After a manual reset using [Reset] on the LCP, [Auto On]
must be pressed to restart the motor.
An (X) marked in Table 4.2 means that action occurs. A
warning precedes an alarm.
A trip lock is an action when an alarm occurs which can
damage the frequency converter or connected equipment.
Power is removed from the motor. A trip lock can only be
reset after a cycling power has cleared the condition. Once
the problem has been rectified, only the alarm continues
flashing until the frequency converter is reset.
No. Description Warning Alarm Trip Lock Parameter Reference
2 Live zero error (X) (X) 6–01
3 No motor (X) 1–80
4 Mains phase loss (X) (X) (X) 14–12
7 DC over voltage (X) (X)
8 DC under voltage (X) (X)
9 Inverter overloaded (X) (X)
10 Motor ETR over
temperature
(X) (X) 1–90
11 Motor thermistor over
temperature
(X) (X) 1–90
13 Over Current (X) (X) (X)
14 Earth fault (X) (X) (X)
16 Short Circuit (X) (X)
17 Control word timeout (X) 8–04
Troubleshooting
VLT
®
HVAC Basic Drive Service Manual
MG90X202 - VLT
®
is a registered Danfoss trademark 35
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