5.2.2. Compressor fails to start at the initial seconds of operation
(with starting attempts)
The supply voltage is out of specification.
Check the power supply and guarantee the
minimum starting voltage.
Balanced pressure above the specified
compressor limit due to excessive refrigerant
charge.
Revise the refrigerant charge.
Balanced pressure above the specified
compressor limit due to the presence of
contaminants in the circuit (non-condensable
gases).
Repeat the refrigerant charge procedure
replacing the filter dryer.
Balanced pressure above the specified
compressor limit due to a characteristic of the
system design.
Revise the refrigeration circuit design to increase
volume to decrease balanced pressure.
Balanced pressure above the specified
compressor limit due to the defrost with heater is
imposing too high temperature to the evaporator.
Restrain the evaporator temperature below 30°C
at end of the defrost to restrain balanced
pressure.
Unbalanced pressure above the specified
compressor limit due to the compartment
temperature excessively high imposing a high
suction pressure.
Revise the refrigerator design to reduce the
suction pressure (lower compartment
temperature).
Unbalanced pressure above the specified
compressor limit due to the ambient temperature
excessively high imposing a high discharge
pressure.
Revise the refrigerator design to reduce the
discharge pressure (lower condensing
temperature).
Discharge pressure imposed by the system is
high above the envelope limit due to obstruction
at the discharge line.
Check for defective welding on the discharge
tube.
Discharge pressure imposed by the system is
high above the envelope limit due to a lack of
enough volume at the condenser to hold the
refrigerant charge.
Verify the condenser volume and compare it with
the refrigerant charge volume (attention for
microchannel condenser).
Compressor with a locked rotor (due to
mechanical damage).
Replace compressor with a new one and test for
confirmation;
Return the defective unit to the manufacturer;
Demagnetized rotor (only if the compressor was
previously connected directly to the AC power
supply).
Replace compressor with a new one and test for
confirmation;
Return the defective unit to the manufacturer;
Table 24 – Compressor fails to start at the initial seconds of operation (with starting attempts)
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