SANY LATIN AMERICA
4-157
SY195/205/215/225C9 Crawler Hydraulic Excavator
Structure and Function
Shop Manual - June 2013
●
Air is observed in the refrigerating system
Symptom: Poor refrigeration
NOTE: If refrigerant is added with no evacuation operation performed, the following gauge read-
ing will appear:
Symptom
Cause
Analysis
Remedy
●
Pressure at both Hi- and
Lo-pressure ends very
high
●
Lo-pressure piping feel-
ing hot
●
Foam is observed
through the sight glass
●
Air enters the re-
frigerating system
●
Air enters the refriger-
ant system
●
Insuf
fi
cient evacuation
●
Check if compressor
oil is contaminated
or inadequate.
●
Evacuate and add
new refrigerant.
ZX215-1002173
0
0
01
02
03
04
05
05
0
0
35
MPa
MPa
{cmHg kgf/cm
2
}
{cmHg kgf/cm
2
}
5
3
30
25
25
20
10
1
15
2
15
35
-01
-01
-76
-76
-50
06
07
08
085
8.5
8
7
5
6
4
3
2
1
15
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