Sensor Checking Function - LG ARUN Series Service Manual

Function

4.3 Sensor checking function

Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or
not. It checks 3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors.
It is used for judging sensor abnormality.
Main PCB
Wait for 3 min. after power
SW01S
Main PCB
Set the DIP switch according to the function
Sensor Checking ➠ Refrigerant Auto Charging : 1,2,7 ON
SW01B
Sensor Checking ➠ Refrigerant Checking : 1,2,7,14 ON
SW02B
Would you perform
the Sensor
checking?
Yes
Main PCB
Press the black button for 2 sec. on main PCB.
SW01V
Indoor/Outdoor units operate with
air circulation mode
Judging sensor
normality
Main pcb
Error Display
LED
Main PCB
Press the black button on the main PCB for 2 sec.
SW01V
Press the black button for 2 sec. after turning off all
of SIP switch.
Completed.
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
)
Note 2
Start
reset
Don't Perform Sensor Checking
No
Note 3)
Yes
No
Note 4)
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. Reference the sensor error in ** page.
5. Refer to service manual about refrigerant auto
charging
Caution
1. Confirm auto addressing has been performed (Check
installed number of IDU).
2. 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.
Refrigerant Auto Charging
Press the black button
until '508' is displayed
Refrigerant
Auto Charging
- 34 -
Note 1)
Refrigerant Checking
Press the black button
until '608' is displayed.
Refrigerant
Checking
LGE Internal Use Only