USE AND INSTALLATION MANUAL ELFO
35
5.4 FAULTS AND POSSIBLE REMEDIES
Anomalia Causa Rimedio U/INS/CAT
The compressor
does not start
Power failure Verify the presence of voltage INS
main switch in pos. OFF Check the upstream safety systems U
low supply voltage Check power line INS
Fault compressor condenser Replace the part CAT
compressor failure Replace the part CAT
High pressure operation Rearm pressostatato U/INS/CAT
Yield
insufficien
Lack of coolant Check INS
Wrong size of the equipment Check INS
Operation outside of the conditions the
manufacturer’s recommended operating
Check INS
Compressor
noisy
Part of the refrigerating circuit in contact with
the carpentry
Check INS
Return of liquid to the compressor Check charging / cleaning filter CAT
not suitable unit fixin Check INS
Powered by reversed phase (400V models) Reverse one phase INS
Noise and
vibrations
Contact with metal bodies Check and outdistance IST
loose or missing screws Tighten the screws IST
The compressor
He stops for
intervention
protections
Excessive head pressure Check CAT
Low suction pressure Check CAT
low supply voltage Check the power supply INS
Electrical connections badly tightened Check INS
Operation outside the permissible limits Check INS
Bad operation or pressure probes Replace the part INS /CAT
Thermal protection trip Check electrical insulation windings CAT
Pressure
flo
High> 24 bar
Excessive refrigerant Check CAT
dirty filter fan units (in heat pump Clean the filte U/INS /CAT
Hot air layering (in heat pump) Check INS /CA
Pressing
aspiration
low <1 bar
Refrigerator discharge circuit Check and reload CAT
Exchanger evaporator side blocked Check and if necessary replace the component CAT
dirty filter fan units (cooling Clean filte U/INS /CAT
Absorption
high electrical
Refrigerant pressure is too high compared to
what is recommended
Check maximum absorption expected in data
and characteristics table
INS/CAT
Wrong pressure valve adjustment Calibrated valve pressure switch INS/CAT
Voltage does not comply Check voltage supply IST
The water of
cooling
It circulates also in
machine off
Pressure valve not calibrated properly Calibrate the pressure valve INS /CAT
The blower does
not work
off blower fan and
spies
extinguished
Power failure Verify the presence of voltage U/INS
main switch in pos. OFF Check the upstream safety systems U/INS
Intervention safety pressure AP
(high pressure)
Check the water flow and eset the pressure
switch by pressing the button behind the
black cap on the front panel (in case of dual
compressor model there are 2 buttons, press
them both)
U/INS/CAT
MAINTENANCE UNIT
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