Hitachi FSXN Series Service Manual page 245

8 Troubleshooting
Even though the wireless remote control is used for the wall type indoor unit with integrated receiver, the alarm code can
be checked by connecting the PC-ART to the unit connector and pressing the operation switch.
N O T E
1 The unit does not operate by pressing the operation switch.
2 The above function is only available when the alarm occurs.
3 Checking of the PCB via the remote control is not available.
4 The indication is the data when connecting PC-ART, not the data before the alarm occurs.
Contents of Check mode 1
The following indication is displayed when the "▲" pushbutton is pressed, which is located below the TEMP indication on
the remote control. If the "▼" pushbutton is pressed, the prior indication is displayed.
Temperature Indication
Indoor Unit Temp.
1
Setting (ºC)
Indoor Unit
2
Intake Air Temp.
at Thermistor (ºC)
Indoor Unit
3
Discharge Air Temp.
at Thermistor (ºC)
Indoor Unit Heat
4
Exchanger Liquid
Pipe Temp. (ºC)
Temperature at
5
Remote Sensor (ºC)
Outdoor Unit
6
Ambient Air Temp.
(ºC)
Indoor Unit Heat
7
Exchanger Gas
Pipe Temp. (ºC)
Outdoor Unit
8
Evaporating Temp.
during Heating (ºC)
9 Control Information
Discharge Gas
10
Temp. at the Top of
Comp. Chamber (ºC)
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239
SMGB0065 rev. 1 - 12/2010
Indication of Category Code
Indication of Temperature, etc.
...... Temperature Displayed
Normal
- - Thermistor Open-circuited
or PCB Defected
or
Abnormal
129 (Temp. for Top of Comp.: 129)
F F Thermistor Short-circuited
or PCB Defected)
or
255
or
127 (Temp. for Top of Comp.: 127)
See "Self-Checking of PCBs using
Remote Control Switch".
(NOTE 1) During transient period such as starting time, etc.,
"- -" may be indicated for a limited time.
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 "- -".
This indicates the internal information for the remote
control switch. In case of SET-FREE, this indication
shows the operating compressor quantity.
(ex.) During two compressors operation, average
temperature of two compressors is indicated.
In case that temperature is higher than 126ºC, "
".
8