Check Pcb Of The Units - Hitachi PC-ARFG-E Installation & Operation Manual

SERVICE & INSTALLATION MENU

6.3.4 Check PCB of the Units

This function is used to Self check the PCB of the indoor and
outdoor units.
1 Select "Check PCB of the Units" on the "Check Menu"
screen and press "OK".
2 Press " ", " ", " ", or " " to select the indoor unit. Press "OK".
If there is only one indoor unit connected to the wired remote
controller, this screen is not displayed (the screen in Step3 is
shown).
3 Check result is shown.
88 PMML0565 rev.1 - 04/2022
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Unit check result
Indoor Unit PCB
00 Normal
01 Abnormality of inlet air temperature thermistor
02 Abnormality of outlet air temperature thermistor
03 Abnormality of liquid temperature thermistor
04 Abnormality of remote thermistor
05 Abnormality of gas pipe temperature thermistor
07 Abnormality of transmission of outdoor unit
08 Abnormality of transmission of central station
0A Abnormality of EEPROM
0b Zero Cross input Failure
Abnormality of transmission of Indoor unit during check
EE
(Wired remote controller ↔ Indoor unit)
Outdoor Unit PCB
00 Normal
F4 ITO Input failure
F5 PSH Input failure
F6 Abnormality of protection signal detection circuit
F7 Abnormality of phase detection
F8 Abnormality of transmission of inverter
FA Abnormality of high pressure sensor
Abnormality of compressor discharge gas temperature
Fb
thermistor
FC Abnormality of low pressure sensor
Fd Abnormality of evaporating temperature thermistor at heating
Depending on the outdoor unit model:
FE • Abnormality of gas piping temperature thermistor
• Abnormality of condensing temperature (heat exchanger)
FF Abnormality of ambient air temperature thermistor