Hitachi FS3 Series, Service Manual

Page: 113 / 240

1
TROUBLESHOOTING
105
b. Heating Operation (It is applicable when outdoor temperature is higher than 0 °C)
No. Check Item Standard Causes Result
1 Is oE1(O.U. Ex. Valves Opening) abnormally low or
high when TdSH is 15 to 30 deg.? oE1 = 30~70%
/RZ,QVXIILFLHQW
5HIULJHUDQW
+LJK([FHVVLYH
5HIULJHUDQW
2
Is Pd
Î
1.6
à
to
Î
2.2
à
?
(Pd is high when the indoor temperature is high.)
–
/RZ6ROHQRLG9DOYH
69$/HDNDJH
+LJK([FHVVLYH*DV
3LSH5HVLVWDQFH
3 Is H1(Compressor Frequency) + (CC (Numbers of
Running Compressor)-1) (
v
) abnormally low or
high? (The lower is the room temp. and outdoor
temp., the higher is the above value.)?
–
/RZ([FHVVLYH
5HIULJHUDQW
+LJK,QVXIILFLHQW
5HIULJHUDQW
([FHVVLYH3LSH
5HVLVWDQFH
4
Is Ps
Î
0.2
à
to
Î
0.5
à
?
(Only under the condition that electrical expansion
valve SVA is OFF.)
–
/RZ286KRUWFLUFXLW
/RZ+LJK28)DQ
7K\ULVWRU)DLOXUHRU
2XWGRRU$LU6HQVRU
)DLOXUH
5 Is the temperature difference between I.U.* more
than 15 deg. when iE(I.U. Ex. Valve) is 100?
*The temperature difference between I.U. means the
following;
b3(Discharge Gas Temp.) - b2(Intake Air Temp.)
indicated on the remote control switch by check
mode. However, this is applicable only when
b2(Intake Air Temp.) - b1(Setting Temp.) is higher
than 3 deg. –
)DLOXUHVXFKDV3&%
:LULQJ&RLO9DOYH
([FHVVLYH3LSH
5HVLVWDQFH
7KHUPLVWRU)DLOXUHIRU
'LVFKDUJH$LU
NOTES:
1. The symbol with an underline indicates
checking item and the mark
Î à
indicates
checking data.
2. Regarding (
v
), the following value should
be applied.
Mark
v
Power Supply
8HP 10HP 16, 20HP
380-415V 50Hz 50 62 70