Hitachi RAS-2-HVNP Service Manual page 279

8. Troubleshooting
  
Checking procedure of PCB by means of the Remote Control Switch
(1) Press and hold " " (menu) and "?" (help) simultaneously
for 3 seconds during the normal mode.
The check menu is displayed.
(2) Select "I.U./O.U. PCB Check" from the check menu and
press "OK".
(3) Select the set indoor unit by pressing "
"OK". (This screen is NOT displayed when the number of indo-
or units connected with the remote control switch is 1 (one). In
this case, (4) will be displayed.)
(4) The indoor unit PCB and the outdoor unit PCB checks are
started.
* If " " (menu) is pressed during the check, the check is cance-
led and the screen will return to (2).
* If " " (return) is pressed during the check, the check is can-
celed and the screen will return to (3).
(5) After completing the check, the result of PCB check will be
indicated. Press " " (return) and return to (3).
Result of check table
Indoor Unit PCB
00 Normal
01 Abnormality of Inlet Air Temp. Thermistor
02 Abnormality of Outlet Air Temp. Thermistor
03 Abnormality of Liquid Pipe Temp. Thermistor
04 Abnormality of Remote Thermistor
05 Abnormality of Gas Pipe Temp. Thermistor
01 Abnormality of Transmission of Central Station
08 Abnormality of EEPROM
0A Zero Cross Input Failure
b Abnormality of Transmission of I.U. during Check
265
SMGB0079 rev.0 - 01/2013
Check Menu
I. U./O. U. PCB Check
Self Checking
SEL.
I.U./O.U. PCB Check
01-01
" and press
01-02
01-03
01-04
SEL.
I.U./O.U. PCB: Check 01-01
I.U./O.U. PCB: Check 01-01
Outdoor Unit PCB
00 Normal
07 Abnormality of Transmission of Outdoor Unit
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
Fb Abnormality of Comp. Discharge Gas Temp. Thermistor
FC Abnormality of Low Pressure Sensor
Fd Abnormality of Evaporating Temp. Thermistor at Heating
FF Abnormality of Ambient Air Temp. Thermistor
02
02
ENT. RTN.
OK
02-01 03-01 04-01
02-02 03-02 04-02
02-03 03-03 04-03
02-04 03-04 04-04
RTN.
OK ENT.
Check 1: Checking
Check 2: Checking
Check 3: Checking
Check 1: 00
Check 2: 00
Check 3: 00
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