Caution
The above is not a comprehensive
analysis of the Scroll compressor
refrigeration system. The aim is to
give operators simple instructions on
basic unit processes so that they
have the technical knowledge to
identify and bring defective
operations to the notice of qualified
technicians.
18
RAU-SVX01B-E4
I) Suction pressure too high
Compressor operates continuously.
Suction duct abnormally cold.
Refrigerant flows back to compressor.
J) Suction pressure too low
Excessive pressure drop through filter
drier. Refrigerant does not flow
through thermostatic expansion valve.
Loss of power.
Superheat too low.
Excess cooling demand on
evaporator.
a) Expansion valve too far open.
b) Expansion valve locked in open
position.
Drier filter clogged.
Expansion valve bulb has lost its
refrigerant.
Expansion valve obstructed.
Excessive pressure drops through
evaporator.
Check system.
a) Check for superheat and check that
expansion valve bulb is secure.
b) Replace.
Replace the deshydrator.
Replace the bulb.
Replace.
Check adjustment of superheat and
adjust thermostatic expansion valve.
Problems symptoms
Problem cause
Action recommended
Summary of Contents for RAU-SVX01B-E4
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