LG THERMA V AHNW16606B0, Service Manual, Page: 59 / 81

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Display
code
Title Cause of error Check point & Normal condition
35 Low Presser Error
Excessive decrease of low
pressure
• Defective low pressure sensor
• Defective unit fan
• Refrigerant shortage/leakage
• Deformation because of damage of refrigerant pipe
• Defective unit EEV
• Covering / clogging (unit covering during the
cooling mode / unit filter clogging during heating
mode)
• SVC valve clogging
• Defective unit PCB(Inverter)
• Defective unit pipe sensor
n
Error diagnosis and countermeasure flow chart
Are communication cable/
piping normal?
No
Is amount of refrigerant
normal?
Yes
No
Adjust the amount of
refrigerant (Additive charge)
check communication/
piping correction.
Is strainer Ok?*
No
Replace the strainer
No
Replace the pressure sensor
Yes
Yes
Check unit LEV
Check unit PCB(Inverter)
Check unit
installation conditions
Yes
Is there pipe crack or trace
of refrigerant leakage?
Weld / reconnect the cracked
portion and recharge refrigerant
No
Yes
* If the temperature difference between inlet and outlet of strainer
is so large that frost or ice formation can be seen or confirmed
then clogging of strainer should be checked
(Notice: it is not full ice forming of strainer, in case that there is
not at inlet portion but at outlet portion)
Are the value of manifold
gauge and pressure
sensor same?
(Is the low pressure value
actually low?)