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M.FACSW90IU-00 ITA-ENG 13/03/2023
FD
EN
22.2.1 Machine stop (stand by)
If the machine is connected, it works with automatic controlled by the mode request.
When there is no request and no alarm active the on led POWER is on.
Before the first Start-up, the machine must be kept in STAND-BY position at-least for 5 hours.
23 Control and Safety devices
All the control and safety device are calibrated and tested in factory before the shipping. Their functions are describe in
the following paragraphs.
23.1 Thermostat
The thermostat enable and disable the unit according to the set point.
In order to check if the unit work correctly turn the knob until the minimum value. First the fan must turn on and after a
delay the compressor. The unit must stop when the set point is reached.
23.2 Safety devices
All the safety device are calibrated and tested in factory before the shipping. Their functions are describe in the following
paragraphs.
Warning: All the operations on the control and safety devices must be performed ONLY BY TRAINED PERSONNEL;
calibrations mistake could damage severly units and people too.
23.3 High pressure switch
High pressure switch stops the unit when the discharge pressure exceeds its pre-set limit value. The reset is manual (by
pressing the push-button at the top of the pressure switch located in the electric panel) and can be done only when
pressure is decreased below the device reset value (see table below).
23.4 Low pressure switch
Low pressure switch stops the unit when the suction pressure decreases below its limit pre-set
value. The reset is automatic and it occurs only when pressure is higher than the device differential
resetting value (see table below).
CONTROL DEVICES
ACTIVATION DIFFERENTIAL REINSERTION
High pressure switch (bar) R410A
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