Hitachi FS3 Series, Service Manual

Page: 71 / 240

1
TROUBLESHOOTING
63
n
CONTENTS OF CHECK MODE 1
The next indication is shown by pressing the part
}
of
"TEMP" switch. If the part
~
of "TEMP" switch is pressed,
the previous indication is shown.
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b1 22
1
Indoor Unit Temp.
Setting (°C)
”
b2 20
2
Indoor Unit
Intake Air Temp.
at Thermistor (°C)
”
b3 55
3
Indoor Unit
Discharge Air Temp.
at Thermistor (°C)
”
b4 20
4
Indoor Unit Heat
Exchanger Liquid pipe
Temp. (°C)
”
b5 25
5
Temperature at
Remote Sensor (°C)
”
b6 10
6
Outdoor Unit Ambient
Temp. (°C)
”
b7 25
7
Indoor Unit Heat
Exchanger Gas Pipe
Temp. (°C)
”
b8 02
8
Outdoor Unit
Evaporating Temp.
during Heating (°C)
”
b9 --
9 Control Information
”
bA 41
10
Discharge Gas Temp.
at the Top of Comp.
Chamber (°C)
”
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This indicates the internal information for the remote control switch.
In case of SET-FREE, this indication shows the operating
compressor quantity.
In case that temperature is higher than 100 °C, two digits blinks.
(Ex.)
During more than one compressors operation, average
temperature of two compressors is indicated
In case that temperature is higher than 126°C, "
126
" is always
shown
Normal
Abnormal
. . .
Temperature displayed
– –
129
(Thermistor Open circuited
or PCB defected)
(Temp. for Top of Comp.)
FF
or
(Thermistor Open circuited
or PCB defected)
255
or
127
or
(Temp. for Top of Comp.)
Indication of Category Code
Indication of Temperature, etc
See 1.3.1 Self-Checking of PCB’s
using Remote Control Switch" in pages 1-82,83
This is indicated only when a remote sensor is connected.
The indication of "--" is normally indicated.
RPK series can not connect a remote sensor.
Therefore, indication is "--".
NOTE: During transient period such as starting
time, etc. "
--
" may be indiated for a limited time