Electrical Wirings; Alarm Codes - AERMEC VEC20I Manuel D'installation

15.

ELECTRICAL WIRINGS

The unit must be connected directly to an
electrical outlet or to an independent circuit.
WARNING: it is compulsory to connect the
power cables Phase (L) and Neutral (N) to
the respective terminals, do not to reverse
the connections, and observe the wiring
diagram.
install a device, main switch, or electric plug so
you can fully disconnect the device from the
power supply.
To protect the unit against short circuits, fit
an omnipolar thermal-magnetic trip 2A
250V (IG) to the power line with a minimum
contact opening distance of 3mm.
We recommend using differential devices
suitable for intervening for currents of
different type:
sinusoidal AC and pulsating DC
currents suddenly applied or slowly
rising.
sinusoidal AC with frequency up to
1000 hz
CONNECTION WITH VMF-E18 THERMOSTATS
The VMF-E18 Kit includes the system with
connection cables to the Inverter Control
Module. The cables are wired with
connectors for quick connection.
The installation of the VMF-E18 kit
requires that standard control board and
connection cables to the Inverter Control
Factory settings of the Inverter tab
ATTENTION: Do not change the unit settings.
Any changes to the DIP switch settings of the Inverter board can
cause damage to the unit. For this reason we report the layout
with the factory settings.

ALARM CODES

This section is reserved for the After Sales
service only.
The card is located inside the unit and
requires dismantling.
DANGER! Only qualified service personnel
can access it.
There are 2 LEDs on the Inverter card
(Alarm / Power) that indicate the unit's
operating status.
The table below shows how to decode the
messages.
ALARM TYPE
High temperature
ALARM LED flashes
Overvoltage 3sec ON 0.5sec OFF
Undervoltage
The LED if permanently ON after 1.5min
Overcurrent
Overload
ALARM LED flashes
0.5sec ON 0.5sec OFF
Safety control
STOP Alarm LED permanently on
VEC_I 1903 - 5074551_04
20
The use of B-type circuit breakers is
recommended.
For installations with three-phase power
supply, the following precautions should be
considered:
1 . I n t h e p re s e n c e o f b re a ke rs o r
thermomagnetic switches 3P + N, the
triggering current must be at least 170% of
the total load absorbed by the fan coils for
each phase.
2. The section of the neutral wire must be of
a dimension taking into consideration the
operating current equal to 170% of the total
load absorbed by the fan coils for each phase.
CHARACTERISTICS OF THE CONNECTION
CABLES
Use H05V-K or N07V-K type cables with
300/500V with insulation, piped or ducted.
All the cables must be piped or ducted until
they are inside the fan coil.
The cables leaving the pipe or raceway must
be so positioned that they are not pulled
Module (Signal and Supply) are removed
from the fan coil.
• Mount the thermostat housing to the side
of the fan coil units, on the connections
that were of the control board.
• Remove the cover of the thermostat
housing.
LEDS
Alarm
Power
INDICATIONS
Motor off
Speed reduction
Motor off
DIP SWITCHES
1 - 2 - 3 - 4
IRREGULARITY
Auto-Restart Alarm.
If the conditions persist after 1.5min, the alarm becomes
permanent, the Alarm LED stays on, the system turns off.
Power limitation
Temperature limitation
For alarms reset:
Set 0V ON INPUT
(turn the power off and then on again)
or twisted and are anyway protected from
outside agents.
Stranded cables can only be used with
crimping terminals. Check the wire strands
are well inserted.
The wiring diagrams are subject to continuous
updates, so it is essential to use those on the
machine as your reference.
The control panel may not be fitted on a metal
wall unless this is permanently connected to
an earthed outlet.
When using remote control panels, the
relative wiring diagram must be respected.
Before installing the control panel, read the
instructions carefully and configure the panel
if necessary.
Connect the valve and sensor to the control
board, in the positions indicated in the wiring
diagram.
• Connect the inverter control module VMF-
E18 to the thermostat using the system
with connection cables supplied with the
VMF-E18 kit. Check the connection with
the wiring diagram.
• Complete the connections as indicated in
the VMF-E18 thermostat manual.
VEC20I
VEC24I
VEC30I
VEC34I
VEC40I
VEC44I
VEC50I
VEC54I
Notes