LG Multi V ARWM072CAS5 Service Manual page 143

Error No.
CH150 Discharge superheat low
n Error diagnosis and countermeasure flow chart
Is there indoor unit
which leaks ref.
1)
much ?
Yes
Is EEV head(Coil)
assembly normally?
Yes
Is EEV connector
connected normally?
Yes
Change EEV assembly
1) Ref. leakage much
: Both Pipe in, pipe out temp.
is under 10℃[50℉]
during unit is off(EEV 40pls)
Also, big refrigerant flow
noise occured
Error Type
Discharge superrheat is
under 3℃[6℉]
(liquid back)
No
Is SC EEV or SC
circuit leaks?
Yes
Change SC EEV or SC EEV
assembly
No
Assemble again or change
EEV head(coiL)
No
Connect EEV connector
Error Point
Check liquid bypass
1. Individual power of indoor unit is
2. Indoor unit EEV fault(ref. leak much)
3. Indoor unit EEV connector discon-
4. SC EEV fault(ref. leak much)
5. Liquid pipe – gas pipe direct connec-
No
Check liquid pipe
– gas pipe direct connection
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Self-diagnosis function
Main Reasons
open during operation
nected.
tion