Danfoss VLT FC 100 Series Programming Manual page 206

3. Parameter Description
[2] Analog input 54
[7] Frequency input 29
[8] Frequency input 33
[20] Digital Potentiometer
[21] Analog input X30/11
[22] Analog input X30/12
[23] Analog input X42/1
3
[24] Analog input X42/3
[25] Analog input X42/5
[100] Bus feedback 1
[101] Bus feedback 2
[102] Bus feedback 3
24-09 Fire Mode Alarm Handling
Option:
[0] Trip + reset, Critical
Alarms
* Trip, Critical Alarms
[1]
[2] Trip, All Alarms/Test
NB!
Warranty-affecting alarms. Certain alarms can affect the lifetime of the frequency converter. Should one of these ignored alarms occur
whilst in Fire Mode, a log of the event is stored in the Fire Mode Log.
Here the 10 latest events of warranty-affecting alarms, fire mode activation and fire mode deactivation are stored.
NB!
The setting in par. 14-20 is disregarded in case of Fire Mode being active (see par. 24-0*, Fire Mode).
3.22.2. 24-1* Drive Bypass
The frequency converter includes a feature, which can be used to automatically activate an external electro-mechanical bypass in case of a trip/trip lock
of the frequency converter or the event of a Fire Mode Coast (see
The bypass will switch the motor to operation direct on line. The external bypass is activated by means of one of the digital outputs or relays in the
frequency converter, when programmed in parameter 5-3* or 5-4*.
NB!
Important! After enabling the Drive Bypass Function, the frequency converter is no longer Safety Certified (for using the Safe Stop in
versions, where included).
To deactivate the Drive Bypass at normal operation (Fire Mode not activated), one of following actions must be carried out:
• Press the Off button on the Local Control Panel, LCP, (or program two of the digital inputs for Hand On-Off-Auto).
• Activate External Interlock via digital input
• Carry out a Power Cycling.
206
Function:
It is possible to test the operation of Fire Mode, but all alarm states are actioned normally.
If this mode is selected, the frequency converter will continue to run, ignoring most alarms, EVEN IF DOING SO
MAY RESULT IN DAMAGE OF THE FREQUENCY CONVERTER. Critical alarms are alarms, which cannot be sup-
pressed but a restart attempt is possible (Infinity Automatic Reset).
In case of a critical alarm, the frequency converter will trip and not auto-restart (Manual Reset).
Manual Reset.
par. 24-00, Fire Mode Function
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
).