Hitachi RAS-(2-6)HVNP1(E), Service Manual

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8 Troubleshooting
289
SMGB0087 rev.0 - 12/2013
8
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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.
Check Menu
Self Checking
02
/
02
I. U./O. U. PCB Check
ENT. RTN. SEL.
OK
(2) Select “I.U./O.U. PCB Check” from the check menu and press
“OK”.
(3) Select the set indoor unit by pressing “ ” and press “OK”.
(This screen is NOT displayed when the number of indoor units
connected with the remote control switch is 1 (one). In this case,
(4) will be displayed.)
I.U./O.U. PCB Check
01-01 02-01 03-01 04-01
04-02
04-03
04-04
03-02
03-03
03-04 01-02 02-02
02-03
02-04
01-03
01-04
RTN. SEL.
OK ENT.
(4) The indoor unit PCB and the outdoor unit PCB checks are started.
* If “ “ (menu) is pressed during the check, the check is canceled and
the screen will return to (2).
* If “ “ (return) is pressed during the check, the check is canceled
and the screen will return to (3).
Check 1: Checking
Check 2: Checking
Check 3: Checking
I.U./O.U. PCB: Check 01-01
(5) After completing the check, the result of PCB check will be indi-
cated. Press “ ” (return) and return to (3).
Check 1: 00
Check 2: 00
Check 3: 00
I.U./O.U. PCB: Check 01-01
Result of check table
Indoor Unit PCB Outdoor Unit PCB
00
Normal
00
Normal
01
Abnormality of Inlet Air Temperature Thermistor
07
Abnormality of Transmission of Outdoor Unit
02
Abnormality of Outlet Air Temperature Thermistor
4
ITO Input Failure
03
Abnormality of Liquid Pipe Temperature Thermistor
5
PSH Input Failure
04
Abnormality of Remote Thermistor
6
Abnormality of Protection Signal Detection Circuit
05
Abnormality of Gas Pipe Temperature Thermistor
7
Abnormality of Phase Detection
01
Abnormality of Transmission of Central Station
8
Abnormality of Transmission of Inverter
08
Abnormality of EEPROM
A
Abnormality of High Pressure Sensor
0A
Zero Cross Input Failure
b
Abnormality of Compressor Discharge Gas Temperature Thermis-
tor
b
Abnormality of Transmission of I.U. during Check
C
Abnormality of Low Pressure Sensor
d
Abnormality of Evaporating Temperature Thermistor at Heating

Abnormality of Ambient Air Temperature Thermistor