Hitachi FSG1 Series Technical Catalogue page 387

Example:
n
Cooling Operation
Indoor Unit
iE (%) (from the checking data)
Converted Value of iE
Sum of Converted Value of iE
Normal Value
Judgement
n
Heating Operation
Indoor Unit
Ti (Indoor Suction Temp.)
Average of Ti
To (Outdoor Air Temp.) (°C)
oE1 (%)
Normal Value (*1)
Judgement
?
NOTE:
(*1) The normal value can be read from the curves of
"Expansion Valve Opening" for outdoor units in case
of heating operation, shown in the next pages.
n
The cases where this method is not applicable :
This checking method is not applicable under such
conditions as indicated below.
In such cases, remove the causes of the conditions before
checking.
No. Conditions
1 Short-circuited Air at Indoor Unit
2 Shot circuited Air at Outdoor Unit
Resistance of Connecting Pipe is Big
3
(Due to smashed pipe or small liquid pipe)
Indoor Unit Expansion
4
Valve Failure
Outdoor Unit Expansion
5
Valve Failure
1.0
20
20
(1.0 X 20)
(A)
(B)
1.0
26
(To be added depending on the indoor unit capacity.)
(A)
(B)
OK [(A) is within (B) ±15]
Example: (*2)
RAS-10FSG (Heating Operation)
Locked (Fully Open)
Locked (Fully Closed)
Locked (Fully Open)
Locked (Fully Closed)
2.5 2.5
30 55
21 50
(0.7 X 30) (2 X 55-60)
119 (= 20+21+50+28)
60 to 270 (=10 X 6 to 10 X 27)
OK [(A) is within the range (B).]
2.5 2.5
27 23
25
Tendency of Indoor / Outdoor
Expansion Valve Opening
Cooling
Tends to be
Excessively Open
Tends to be
Excessively Open
Tends to be
Excessively Open
Tends to be
Excessively Closed
Tends to be
Excessively Open
–
Tends to be
Excessively Open
17
TEST RUN
/11
4.0
40
28
(0.7 X 40)
4.0 RAS-10FSG
24 -
10
58
55 (*2)
(OE1)
Heating
–
Tends to be
Excessively Closed
Tends to be
Excessively Open
–
–
Tends to be
Excessively Closed
Tends to be
Excessively Open