LG ARUN50GS2A Quick Manual page 26

26
Sensor Checking Function (U3 Chassis, 2Fan
Model)
Sensor checking function judges whether the current temperature of
indoor and outdoor unit sensors is right or not. It checks 3 indoor tem-
perature sensors, 9 outdoor temperature sensors, 2 outdoor pressure
sensors.
It is used for judging sensor abnormality.
Start
Main PCB
Wait for 3 min. after power
reset
SW01S
Main PCB
Set the DIP S/W according to the function
Sensor Checking ➠ Refrigerant Auto Charging : 1,2,7 ON
SW01B
Sensor Checking ➠ Refrigerant Checking : 1,2,7,14 ON
SW02B
Don't Perform Sensor Checking
Would you perform
the Sensor
No
checking?
Yes
Note 3)
Main PCB
Press the black button for 2 s on main PCB.
SW01V
Indoor/Outdoor units operate with
air circulation mode
Yes
Judging sensor
normality
No
Note 4)
Main pcb
Error Display
LED
Main PCB
Press the black button on the main PCB for 2 s
SW01V
Press the black button for 2 s after turning
off all of DIP S/W.
Completed.
CAUTION
!
• Confirm auto addressing has been performed (Check installed num-
ber of IDU).
• The error can be displayed even if the sensor is normal according to
installation and temperature condition.
If error occurs, check the sensor and judge abnormality.
Sensor Check Error Code Display
Error display during sensor inspection process is composed of 3 stages
as shown below, and is proceeded by repeating these stages
Step 1 : Display of error existence : 309 or 319
- 309 : Inspect sensors of outdoor unit
- 319 : Inspect sensors of indoor unit
Step 2: Display of error location
- In case of 309 (outdoor unit sensors)
2 digits on the left among 7 segments – Sensor Type (Table1)
1 digit on the right among 7 segments – Outdoor Unit Number
- In case of 319 (indoor unit sensors)
2 digits on the left among 7 segments – Indoor Unit Number
1 Digit on the right among 7 segments – Sensor Type (Table 2)
Step 3: Turn Off
h 1 error is displayed through 3 stages above and maximum of 5 errors
are displayed.
Note 2)
Note
1. Sensor checking function is used with Refrigerant
Checking and Refrigerant Auto Charging.
2. Check abnormal sensor
3. It is displayed at the LED on the main PCB at each step.
4. Refer to the next page for sensor error code part
Refrigerant Auto Charging
Refrigerant Checking
Press the black button
Press the black button
until '508' is displayed
until '608' is displayed.
Refrigerant Refrigerant
Checking
Auto Charging
(Same as LGMV (automatic
address configuration) indoor
unit number)
Displaying error content
Indoor unit error display
- 1st and 2nd number represents indoor unit number.
Indoor unit number follows auto addressing number.
- Last number represents sensor.
1 Pipe inlet temperature sensor
2 Pipe outlet temperature sensor
3 Air temperature sensor
h Indoor unit number follows Auto addressing number.
Displaying outdoor unit error
st nd
- 1 and 2 number represents error content(code).
- Last number represents outdoor unit number.
1 Outdoor Air Temperature
2 Heat Exchanger 1
4 Inverter Compressor Discharge Temperature
6 Suction Temperature
7 Liquid Pipe Temperature
9 SC pipe out
10 High Pressure Sensor
11 Low Pressure Sensor
ex) Indoor unit No. 2 pipe inlet temperature sensor error
ex) Outdoor unit liquid pipe temperature sensor error
ex) Indoor unit No.2 pipe inlet temperature sensor error and outdoor
unit suction temperature sensor error
CAUTION
!
• Up to 5 number of errors is displayed continuously and repeatedly.
In case 5 number of errors occurs, again perform sensor checking
after solving errors.
• IDU in which error occurred operates air circulation mode.