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Detailed malfunction analyse
13.3
Does ind oor heat -
Check sp eed
Yes
ex chan g er frosted?
of in door
motor.
Doe s the outdoo r
Che ck s peed
temp over 48 C?
of o utdoo r
mo tor.
Check t he over-
curre n t prot ect or of
comp ressor.
Recycle the
refrigerant
and recharge .
Re place the
ma in PCB board .
Is the L&N c onnections betwe en
indoor and outdoor units corr ec t?
Is the c omm unic ation conne ction good?
37
Yes
No
Yes
o
No
C heck the soft
s t arter mou ld.
Re place the
co mpressor.
R eplace the re verse
v alve.
Indoor /Outdoor Units C ommunic ation Pr otection
Yes
Re place the outdor PC B, the n run th e m ac hine.
Is the com mu nica ti on pro tec tion re lie ved?
I t m e a n s t h a t t h e
fr om indoor unit. Re pla ce the indoor PC B.
Service manual
Cur r ent protectio n
(LED indi cates)
Check t he indoor
air filt er.
Check the out door
condenser.
Che ck t he positio n
and wiring of tem p
sen sor (all of the m).
No
D oes it occur in
C ool mode?
Yes
It is n orma l under
tha t ambient temp .
No
Yes
Yes
m a l f u n c t i o n i s
If wro ng, t he unit w ill
result in current
prote ction, not tem p.
Yes
Does outdo o r heat -
exchanger fr os ted?
No
Doe s the ind oor
o
temp low than 1 0 C?
No
Check t he solenoid
c oil o f reve rse valve.
Chec k t h e soft
starter m ou ld.
C hec k t he ov e r-
c urre nt prot ect or of
c ompressor.
Replace th e
main PCB board.
Recycle the ref rig e-
rant and rech arge.
Re conne ct cor re ctly.
No
Re conne ct cor re ctly.
Che ck t he
dra inage
s ys tem of
out door unit.
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