Hitachi FSG Series Service Manual page 113

b. Heating Operation (It is applicable when outdoor temperature is higher than 0 °C)
No.
1 Is oE1(O.U. Ex. Valves Opening) abnormally low or
high when TdSH is 15 to 30 deg.?
Is Pd Î1.6à to Î2.2à ?
2
(Pd is high when the indoor temperature is high.)
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.)?
Is Ps Î0.2à to Î0.5à ?
4
(Only under the condition that electrical expansion
valve SVA is OFF.)
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.
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.
Check Item
Power Supply
380-415V 50Hz
TROUBLESHOOTING
Standard
oE1 = 30~70%
–
–
–
–
Mark v
8HP 10HP 16, 20HP
50 62 70
Causes Result
/RZ ,QVXIILFLHQW
5HIULJHUDQW
+LJK ([FHVVLYH
5HIULJHUDQW
/RZ 6ROHQRLG 9DOYH
69$ /HDNDJH
+LJK ([FHVVLYH *DV
3LSH 5HVLVWDQFH
/RZ ([FHVVLYH
5HIULJHUDQW
+LJK ,QVXIILFLHQW
5HIULJHUDQW
([FHVVLYH 3LSH
5HVLVWDQFH
/RZ 28 6KRUW FLUFXLW
/RZ+LJK 28 )DQ
7K\ULVWRU )DLOXUH RU
2XWGRRU $LU 6HQVRU
)DLOXUH
)DLOXUH VXFK DV 3&%
:LULQJ &RLO 9DOYH
([FHVVLYH 3LSH
5HVLVWDQFH
7KHUPLVWRU )DLOXUH IRU
'LVFKDUJH $LU
1
105