S&P VFTM IP21, Руководство пользователя

Страница: 20 / 56

20 20
ENGLISH
2.3 Manual reset – Automatic reset
The frequency inverters are delivered pre-programmed for automatic reset .
This means that in the event of a power cut, the fan will automatically switch on when the power returns.
IMPORTANT
RISK OF ELECTROCUTION
RISK OF SERIOUS INJURY
When is enable the thermal protection motor should review the need to use the manual restart function.
With the factory settings (automatic restart), once skipped the motor thermal protection, when is produced
the motor cooling, it re-start automatically.
See section 2.3. to modify the automatic restart to manual restart.
If the motor connected to the inverter has thermal protection, the inverter must be re-programmed for
manual reset .
IMPORTANT: If the thermal protection is activated it is necessary to wire the motor TP
connections to the corresponding terminals of the inverter in order to achieve electrical
protection.
- Keep ESC pressed down for 2 seconds until the 3 mode leds light up simultaneously. At the moment the
inverter is in Programming Mode .
- Press ENTER and rotate the wheel until “ FLt- ” appears on the screen.
- Press ENTER and rotate the wheel until “ Atr ” ap pears on the screen.
-
Press ENTER and rotate the wheel until “NO ” appears.
- Press ENTER to confirm the value entered. If this value is different to the previous one, the display should
flash.
- Press ESC to exit the “ Atr ” parameter.
- Press ESC to exit th e “ FLt- ” menu.
-
Keep ESC pressed down for 2 seconds until the 3 mode leds light up in sequence. It is now in RUN
mode, available for automatic inverter operation.
Check that the “ SW1 ” switch is in the “ SOURCE ” position
Install the indicated jumpers in the inverter terminal box.
Power the frequency inverter with suitable voltage for the inverter model in question.
2.4 Changing the minimum/ maximum speed
Frequency inverters are delivered pre-programmed with a minimum speed setting at 20 Hz.
Warning ! The continued power supply of a motor at frequencies below 20 Hz can cause motor
overheating and premature failure. Motors that have been working below 20 Hz will not be covered by
warranty.
However, in overpressure applications stairs or escape routes, it is possible that in the
situation of closed doors reduce the minimum speed of inverter to avoid exceeding the
overpressure value established by the relevant regulations. This requires checking out the
inverter and access to the programmation mode (steps 1 and 2 in section 2.2) and then
perform the following configuration changes:
- Press ENTER and rotate the wheel anti- clockwise until “ SEt- ” appears on the screen.
- Press ENTER and rotate the wheel anti- clockwise until “ LSP ” appears on the scre en.
- Press ENTER and rotate the wheel until the necessary value appears for the “Minimum frequency in
Hz ” parameter. Press ENTER to confirm the value entered. If this value is different to the previous one,
the display should flash.
-
Press ESC to exit the “ LSP ” parameter.
- Press ESC to exit the “ Set- ” menu.