目录.p65

Air conditioner--Refrigerant

zThe pressure of high and low
pressure end is low.
zThe pipeline from condenser
to expansion valve frosts.

zRefrigerant flow in adjuster

is obstructed by impurity.

zAdjuster is obstructed. zChange the condenser.

Phenomenon Possible reason Diagnose Method

State: cooling degree is not enough

(4) Refrigerant cycle is poor

(5) Refrigerant does not have any cycle.

zLow pressure side is
vacuum, and pressure at
high pressure side is low.
zThe pipeline of front and
rear end of expansion
valve or adjuster frosts or
dews.

zRefrigerant flow in cool-

ing system is obstructed

by water vapor or dust.

zRefrigerant flow is ob-

structed by expansion

valve.

(1)Check the expansion

valve.

(2)Remove the dirt in ex-

pansion valve with high

pressure air.

(3)Change condenser.

(4)Take out vacuum and fill

applicable refrigerant.

(5)If this is caused by ex-

pansion valve leakage,

change the valve.

Refrigerant does not flow.

Phenomenon Possible reason Diagnose Method

State: not cool (sometime cool)

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