Premium PFR40W - Page 11

No
frost
Compressor
Check t he f r ost
on t he cabi net
l i ner sur f ace
Leakage
check
Cut of f t he
l ow pr eesur e pi pe
No refrigerant
air spurt out
Leakage
poi nt ?
On the
pipe joint
Ref r i ger ant
Leaks
Cut of f t he l ow pr essur e
pi pe and spur t out t he
r esi dual r ef r i ger ant
Repai r t he wel di ng,
cl ean t he pi pe and
r epl ace t he dry f i l t er
Vacuumi ng and
r echar gi ng
Leakage
check agai n
Refrigerant
air spurt out
Cut of f t he hi gh
pr essur e pi pe
Normal suction of
the comressor low
pressure pipe
Char ge t he
ni t r ogen t o t he
condenser pi pe
No air on the
low pressure side
Pi pe
cl ogged
Repl ace t he di r t y and
cl ogged par t s and
cl ean t he syst em pi pe
Little
frost
No air suction on
the compressor
low pressure pipe
Cut of f t he hi gh
pr essur e pi pe
Bad compression
of the compressor
Repl ace t he
compr essor
Leakage
checki ng
Detected
Leakage
poi nt
?
Cut of f t he
l ow pr eesur e pi pe
A little
refrigerant air
spurt out
Leaks
slowly
A little
refrigerant air
spurt out
Repai r t he wel di ng,
cl ean t he pi pe and
r epl ace t he dr y f i l t er
Vacuumi ng and
r echar gi ng
Leakage
check agai n
Big quantity
refrigerant air
spurt out
Cut of f t he hi gh
pr essur e pi pe
Normal suction of
the comressor low
pressure pipe
No air suction or weak
suction on the compressor
low pressure pipe
Compr essor
br eaks down
Repl ace t he
compr essor
Char ge t he
ni t r ogen t o t he
condenser pi pe
Not sufficient nitrogen
air return back the low
pressure side
Pi pe i s
cl ogged
slightly
Repl ace t he di r t y and
cl ogged par t s and
cl ean t he syst em pi pe
Condensate dew
but no frost
Check t he hi gh
pr essur e si de pi pe
and compr essor
Too high
temperature
Check l ow
pr essur e pi pe
Frost
Too mor e
r ef r i ger ant
Frost
Rechar ge appr opr i at e
quant i t y r ef r i ger ant
Cooling
discontinuously
Pi pe i s cl ogged
with ice
Repl ace t he dr y f i l t er
and cl ean t he syst em
pi pe wi t h war m ni t r ogen
Compressor
not working
Check t he el ect r i cal par t s such
as PTC st ar t er , capaci t or , over l oad
pr ot ect or , t her most at et c.
Broken-down
Repl ace t he
br oken- down par t s
Good
Measur e t he
r esi st ance of t he
compr essor wi ndi ng
Abnormal
resistance
Normal
Repl ace t he
compr essor
Over l oad
pr ot ect or act s
Over l ar ge
cur r ent
Repl ace t he
compr essor
Compr essor
goes wr ong
Yes
No
Problem and check point
Cause
Solution