7.3.1 Result of the PCB check
Indoor unit PCB
00
Normal
01
Abnormality of inlet air temperature thermistor
02
Abnormality of outlet air temperature thermistor
03
Abnormality of liquid pipe temperature thermistor
04
Abnormality of remote thermistor
05
Abnormality of gas pipe temperature thermistor
08
Abnormality of Central Station transmission
0A
Abnormality of EEPROM
0b
Zero cross input failure
EE
Abnormality of indoor unit transmission during check
Outdoor unit PCB
00
Normal
07
Abnormality of outdoor unit transmission
F4
ITO input failure
F5
HPS input failure
F6
Abnormality of protection signal detection circuit
F7
Abnormality of phase detection
F8
Abnormality of inverter transmission
FA
Abnormality of high pressure sensor
Fb
Abnormality of temperature thermistor of compressor
discharge gas
FC
Abnormality of low pressure sensor
Fd
Abnormality of evaporating temperature thermistor in
heating
FF
Abnormality of ambient air temperature thermistor
7.4 SELF CHECKING
The self checking performs to check the wired controller and to
clear EEPROM (storage cell inside of the wired controller).
1
Press and hold “Menu” and “ECO” simultaneously for
three seconds during the normal mode (when unit is not
operating). The Check Menu is displayed.
2
Select “Self Checking” from the Check Menu and press “OK”.
Check Menu
Self Checking
02
/
02
I. U./O. U. PCB Check
Entr
Sel.
Rtrn
Back
OK
3
(01) Select the process for “Self Checking”.
-
To start self check, press “ECO”.
-
To clear EEPROM, press “ ” and “ECO” simultaneously.
See EEPROM clear process (15) below.
0 1 : 0 0 0
P-3400
ARF-8Y050
2008.11.06 12:34
Self Checking
4
(02) LCD Test
Press “OK” and the screen changes as shown at the right.
0 2 : 0 0 0
Self Checking
5
(03) Backlight Test
LCD brightness is changed gradually by pressing “OK”.
6
(04) Contrast Test
Contrast of the LCD gradually changes by pressing “OK”.
7
(05) Run Indicator Test
Press “OK” and the run indicator flashes in red and green
twice for each.
03: Backlight Test
04: Contrast Test
05: Run Indicator Test
0 3 : 0 0 0
Self Checking
CHECK MENU
PMML0496 rev.1 - 12/2020
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