To Next PageTo Next PageWhat does it mean if my Blue Box SIGMA 2002 compressor is not running and the display is On, with alarm "E1"?
If the compressor is not running and the display shows alarm "E1", it may be due to: * Interrupted connections to the evaporator inlet temperature sensor. Restore the correct connection of the temperature sensor. * A faulty evaporator inlet temperature sensor. Replace the temperature sensor.
What does it mean if my Blue Box SIGMA 2002 compressor is not running and the display is On, with alarm "E3" or "E5"?
If the compressor is not running and the display shows alarm "E3" or "E5", it could indicate: * Faulty or disconnected resistance RK3 or RK4 (only version LC and LC/HP). Check the resistance and replace if necessary. * Interrupted connections to the pressure sensor (HP version only or if condensation pressure control with fan speed regulator is fitted with version LC and LC/HP). Restore the correct connections to the pressure sensor (“E3” refers to compressor 1, “E5” refers to compressor 2). * A faulty pressure sensor (only on HP version or if condensation pressure control with fan speed regulator is fitted with version LC and LC/HP). Replace the pressure sensor (“E3” refers to compressor 1, “E5” refers to compressor 2).
How to turn on my Blue Box SIGMA 2002 if the main power switch is Off?
If the main power switch is off (position "O"), turn the mains power selector to position "I".
What to check if my Blue Box Chiller compressor isn't running and the display is off due to no power to control circuits?
If there is no power to the control circuits, check the condition of fuses FU50, FU51, and FU52. Also, check the operation of the transformer.
Details on the hermetic scroll type compressors used in the SIGMA 2002 series units.
Description of the refrigerant circuit components and their functions within the unit.
Overview of the electrical panel, including main components and control functions.
Essential safety rules to be followed for operation and maintenance of the unit.
Analysis of mechanical risks and the solutions adopted to mitigate them.
Identification of electrical risks and compliance with safety standards.
Essential checks to perform before starting the unit for the first time.
Procedure for starting the unit using the microprocessor controller.
Procedure for checking the refrigerant charge using sight glass and pressure gauges.
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