Tefcold BLC3AX1 Benutzerhandbuch Seite 244

EVCO S.p.A.
1. Set F19 to 0% and F20 to 100%
2. Perform a manual cycle and, while modulating the fan speed, check the minimum percentage below which
the fan stops and the maximum percentage above which the fan runs at the maximum speed.
3. The values obtained this way shall be set for F19 and F20 respectively.
E16 = 2
The evaporator fans are controlled in a modulating mode with inversion of the fan direction connecting an inverter EVCO
via RS-485 serial port.
The controller is capable of automatically detecting the presence of an EVCO inverter. After setting at 2 the parameter
E16, the system reboots displaying the HOME page. When accessing the SERVICE page, this will include at the bottom
the new INVERTER key.
The first time the inverter is connected to the system, the INVERTER menu must be entered and the INVERTER DETECT
key (which is active) must be pressed to perform a recognition procedure, which will lead in a few seconds to the
message INVERTER ACQUIRED. The display will then show the inverter identification number. If the recognition
procedure leads to the message DETECTION FAILED, try a manual restart of the system to check whether the detection
has been successfully completed.
N.B: failures in the recognition of the inverter might occur if the inverter is not correctly connected.
Inverter parameters can be set both from the page INVERTER SETTINGS and from the PARAMETERS SETUP page (where
they are listed at the end).
The inverter in use can always be replaced with a different model or version. In such case, a new recognition procedure
is to be performed and, if necessary, parameters are to be reset.
As with the phase-cutting control mode (E16=1), also the inverter control mode gives the possibility to select 5 speeds
for the evaporator fans. In the latter case, users can freely set the values for the 5 steps by setting the parameters from
F55 to F59 (respectively from speed 1 to speed 5), where speed is expressed as a percentage of the interval between
the maximum motor speed in RPM (S204) and the minimum motor speed in RPM (S205). Below is the formula to
calculate, as an example, speed 1.
Vcolor 869/879 | Installer manual ver. 4.0 | Code 144VC869E404
page 61 of 96