AWS Installation and operating manual
www.omega-air.si
11
Safety valve
The mandatory safety check of reliability and the setting of the safety valve are to be carried
out once a year by authorized personnel or by the Omega air service team. About the checks
and setting of the safety valves, a record is to be lead.
Possible compressor faults
Problem
Possible reasons
Solution
The compressor does not
start
No electrical energy supply;
Broken safety fuse or auxiliary circuit;
No voltage in the coil switch;
Thermal protection triggered;
The compressor is under pressure;
Pressure switch defect;
Check the outer protection and the
voltage of each phase;
Change the fuse and check for reasons. If
necessary, call the service;
Check the operation of the transformer;
Check the electrical circuit;
Check the coil operation;
Check the manometer and if there is
pressure adjacent, empty the pressure
tank;
Check the electromechanical operation of
the pressure switch;
The compressor stops due
to the activation of the
thermal safety switch
Motor overload;
Pressure switch defect;
Check the line voltage, overload on
different phases; thermal safety
regulation; Check the oil level and
quality, if overheating is involved, check
the performance of all parts.
Safety valve opening
Un-configured pressure switch;
Un-configured safety valve;
Set the pressure switch;
The safety valve is sealed and very
important to the safe operation of the
compressor, so it is important to replace
it with a new one of the same type.
Hindered start-up of the
compressor and
occasional triggering of
thermal protection.
The electrical power on the clamps is
too low;
Motor overloading;
Un-configured thermal protection;
Abnormal resistance in the
compressor unit;
The electrical valve closes
mechanically;
Electrical current interruption;
Check the voltage. (max difference of 6%
considering the nominal value);
Reset the thermal protection, if the
operation is no more guaranteed.
Remove the belt and check the oil level,
normal operation of the compressor unit
and the motor;
Check the electrical circuit.
Efficiency of the
compressor is low or non-
existent.
The intake filter is clogged;
Loose or worn out belts;
Leakage at connections;
Mechanical irregularities on the
compressor unit.
Clean or change the suction filter
cartridge;
Tighten or change the belt;
Check the connections with the help of
soap water;
Check the compressor thoroughly with
the help of a service technician.
