Hitachi RAS-3-HVNC - Page 268

8. Troubleshooting
254
SMGB0079 rev.0 - 01/2013
Although the wireless controller is used for the wall type indoor unit with the built-in receiver part, you can check the alarm
code by connecting the PC-P2HTE.
Suction grille
Connector
for check
N O T E
• Theunitdoesnotoperatebypressingtheoperationswitch.
• Theabovefunctionisavailableonlywhenthealarmoccurs.
• ThePCBcheckusingtheremotecontrolswitchisnotavailable.
• TheindicationisthedatawhenyouareconnectingPC-P2HTE.Theindicationisnotthedatabeforethealarm
occurs.

Contents of the check mode 1
The next indication is shown if you press the part “
” of the TEMP switch. If you press the part “” of the TEMP switch,
the previous indication is shown.
Temperature indication
Indication of the category code
Indication of the temperature, etc
1
Indoor unit temperature setting
(°C)
b1 22
2
Indoor unit air inlet temperature at
thermistor (°C)
b2 20
Normal ... Temperature displayed
3
Indoor unit discharge air tempera-
ture at thermistor (°C)
b3 55
Abnormal
--
(Thermistor is open-circui-
ted or PCB is defective)
or
4
Indoor unit heat exchanger liquid
pipe temperature (°C)
b4 20
12g
(Temperature for top of
compressor)
5 Temperature at remote sensor (°C)
b5 25
FF
(Thermistor is short-circui-
ted or PCB is defective)
or
6
Outdoor unit ambient temperature
(°C)
b6 10
255
or
7
Indoor unit heat exchanger gas
pipe temperature (°C)
b7 25
127
(Temperature for top of
compressor)
8
Outdoor unit evaporating
temperature during heating (°C)
b8 02
Refer to section Self-checking procedure
of PCB using the remote control switch
9 Control information
bg --
During the transient periods such as starting time and other, the
indicators “--” or “00” may be displayed for a limited time.
This is indicated only when a remote sensor is connected.
The indicator “
--” is normally displayed.
RPK series cannot connect a remote sensor.
Therefore, the indicator is “--”.
This indicates the internal information for the remote control switch.
This does not have any specic meaning.
(Ex.) During the operaton of several compressors, the average
temperature of two compressors is indicated.
If the temperature is higher than 126 ºC, “
126”
10
Discharge gas temperature at the
top of the compressor chamber
(°C)
bA 41
11
Thermo temperature of the remo-
te control switch
bb 23