Hitachi RAS-H(V)RNME-AF Service Manual page 366

12 Troubleshooting
17
Alarm code
• The alarm code is displayed on the LCD User interface.
• The alarm code is displayed on the seven segments of the indoor unit PCB.
• This alarm code is displayed when the sensor is abnormality when SWIMMING POOL is enabled.
Is ATW-SPS-01
connected to (intake)
terminals 34(+) &35 (-) of
TB2?
(+) – TB2-34(+)
ATW-SPS-01
(-) – TB2--35(-)
Is resistance
inside ATW-SPS-01
between 92.16kΩ and
119.40kΩ?
Is the current of
ATW-SPS-01 output
between 4-20 mA?
Is the temperatu-
re of THMswp bet-
ween 50ºC and -30ºC?
Faulty PCB1
356
SMGB0070 rev. 1 - 08/2011
Swimming pool (THM ) Thermistor Abnormality
SWP
No
TB2
Yes
No
Yes
No
Yes
No
Yes
Connect it
Faulty device
(Change ATW-SPS-01)
Yes
Is the
current 0mA?
No
Check correct
position of
THMswp and
correct it
Repair harness
Check Harness connection
between TB2-34/35 and
PCB Connection (check
Electrical wiring diagram)
Datas: Resistance value
220Ω Power supply to
ATW-SPS-01 (+) 12Vcc
Is all correctly?
Yes
Faulty device
(Change ATW-SPS-01)