18 CSRN-XHE2 FFA 12.2-24.4 M07Z40M15-02
7.9 Scroll compressor
The Scroll compressors have only one rotation direction.
In the event it is reversed, the compressor is not immediately damaged, but increases its noise and jeopardises pumping.
After a few minutes, the compressor blocks due to intervention of the thermal protection.
In this case, disconnect power supply and invert 2 phases on the machine power supply.
Avoid the compressor working for a long time with contrary rotation: more than 2-3 of these anomalous start-ups can damage it.
To ensure the rotation direction is correct, measure the condensation and suction pressure.
The pressures must signicantly dier: upon start-up, the suction pressure decreases whereas the condensation one, increases.
7.10 Remote controls
Check that the remote controls (ON-OFF etc) are connected and, if necessary, enabled with the respective parameters as indicated in the
“electrical connections” section.
Check that probes and optional components are connected and enabled with the respective parameters (“electrical connections” section and
following pages).
7.11 Air ow setting
The real unit ow is according to the aeraulic system features.
Before checking, make sure that the system has been completed in all its parts (shunts, dampers, grilles, diusers etc.).
Check the doors and windows of the serviced room are closed.
Set the ow rate:
par 2252 (l/sec)
7.12 ECO mode
This function is indicated for the thermal maintenance of the served area in case it is temporarily not used, which can for example occur at
night.
The ECO mode can be activated:
•
Manually: P1008 enable setpoint Eco = 1
•
Automatically by means supervision system
P1002 Setpoint ECO Cool
P1003 Setpoint ECO Heat
P1004 Set UR ECO Cool
P1005 SetUR ECO Heat
P1008 Enable EcoMode
Set
ECO
Heat
Set
ECO
Cool
Set
Heat
Set
Cool
Air temp
7.13 Set-point automatic compensation
The set changes automatically according to the outside temperature.
Even the operating mode changes automatically according to the outside temperature.
The variation is dened by the climatic curve.
Par 1006 = 1 Enables automatic mode change
Par 1007 = 1 Enables automatic setpoint