Power Supply; Operation; How To Check The Alarm Status - TECSYSTEM VRT200 Instruction Manual

POWER SUPPLY

The VRT200 control unit must be supplied with 85- 250Vca50/60Hz, terminals 40-42, terminal 41 ground (check the
connection diagrams on pages 9).
A variation in the network voltage of over 10% might cause alarms because of the current variation in the load.
If the electrical system is affected by harmonic frequencies, alarm warnings might be triggered because of the
consequent variation in the current absorbed by the motors.
It is good practice to make sure that the level of system harmonics is not such as to cause malfunction or damages to
all the connected electrical and electronic instruments, in compliance with the regulations in force for the type of
system.

OPERATION

When switched on, the device carries out a LAMP TEST and is set either in REMOTE or LOCAL mode, according to
how it was set before being switched off.
In REMOTE mode the fans are activated when contacts COM-EN1 and COM-EN2 closes, which must be connected
to the FAN contact of the temperature control unit.
In LOCAL mode the fans are activated by pressing the <START-STOP> button.
The status of operation is stored in case of power failure.

HOW TO CHECK THE ALARM STATUS


Running LED OFF: no ventilation activation control

Running LED ON: REMOTE or LOCAL ventilation activation

Over- and under-current LEDs OFF: motor operating correctly

Over-current LED ON: motor stopped due to over-current

Under-current LED ON: motor working + under-current alarm signal

Intellifan LED ON: Intellifan function enabled

Intellifan LED OFF: Intellifan function disabled

Under-current LED flashing: motor disconnected while auto-tuning

Over-current LED ON: motor consumption >5.5A (immediate trip without any delay)

All LEDs flashing: corrupted memory error (ech); press reset and repeat the programming procedure
N.B.: A motor in a state of alarm or the interruption of supply to the device make contacts 8-9 of the FAULT relay closes.
HOW TO RESET A MOTOR IN ALARM
To reset an alarm due to under-current, over-current, overtemp-aux, press the RESET button after carrying out the
necessary checks and any repairs might be required.
OPERATION WITH FANS NOT TECSYSTEM
The proper functioning of the VRT unit is guaranteed only for: fans with current absorption between 250mA
(IN MAX 20%) or 300mA (IN MAX 30%) and 5A , single phase, single speed and power variation is not
greater than ± 10%.
IMPORTANT NOTE: if an existing control unit must be replaced with a new one, to guarantee
its correct and safe operation, all the connecting terminals must be replaced with the new terminals supplied,
on condition the brand of the new terminals is different from the one of the previously installed ones.
10
VRT200