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Troubleshooting
Procedure :
3. Do a IU/OU Pcb check by using the wall controller (PC-ARF)
OPTIONAL FUNCTION
(Operation from Remote Control Switch)
P5415038
4-21
(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 unit
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 indicated. Press “ ” (return) and
return to (3).
Check 1: 00
Check 2: 00
Check 3: 00
I.U./O.U. PCB: Check 01-01
(3) I.U./O.U. PCB Check
Indoor Unit PCB
Outdoor Unit PCB
Normal
Normal
Abnormality of Inlet Air Temp. Thermistor
Abnormality of Transmission of Outdoor Unit
Abnormality of Outlet Air Temp. Thermistor
ITO Input Failure
Abnormality of Liquid Pipe Temp. Thermistor
PSH Input Failure
Abnormality of Remote Thermistor
Abnormality of Protection Signal Detection Circuit
Abnormality of Gas Pipe Temp. Thermistor
Abnormality of Phase Detection
Abnormality of Transmission of Central Station
Abnormality of Transmission of Inverter
Abnormality of EEPROM
Abnormality of High Pressure Sensor
Zero Cross Input Failure
Abnormality of Comp. Discharge Gas Temp. Thermistor
Abnormality of Transmission of I.U. during Check
Abnormality of Low Pressure Sensor
Abnormality of Evaporating Temp. Thermistor at Heating
Abnormality of Ambient Air Temp. Thermistor
< Result of Check Table >