42
CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
Troubleshooting
2.Field Maintenance
Refrigerant Circuit
Others
Possible causes of trouble
Dir
ty e
vapor
at
or coil
Insufficient air thr
ough e
vapor
at
or coil
Ov
er
char
ge of r
efr
iger
ant
Dir
ty or par
tiall
y block
ed condenser
Air in r
efr
iger
ant cy
cle
Air flo
w cir
culation no
t cor
rect
High t
em
per
atur
e at condenser
Insufficient condens flo
w
Br
ok
en com
pr
es
sor int
er
nal par
ts
Inefficient com
pr
es
sor
Expansion v
al
ve obs
truct
ed
Expansion v
al
ve or capillar
y tube s
tuck
ed
Leaking po
w
er element on e
xpansion v
al
ve
Poor ins
tallation of f
eeler bulb
Insufficient cooling load
Loosen bolts or scr
ew
s
Packing r
es
t in the unit
Poor capacity
Cont
act with o
ther com
ponents lik
e pipe or plat
e
Unit will not start
Compressor does not start - Only fan runs
Compressor and condenser (outdoor) fan will
not start
Evaporator (indoor) fan will not start
Condenser (Outdoor) fan will not start
Unit runs, but shortly stops
✩
✩
✩
✩
Compressor short-cycles due to overload
✩
✩
High discharge pressure
✩
✩
✩
✩
✩
✩
Low discharge pressure
✩
High suction pressure
✩
✩
✩
✩
Low suction pressure
✩
✩
✩
✩
✩
Unit runs continuously but insufficient cooling
✩
✩
✩
✩
✩
✩
✩
✩
Too cool
Compressor is noisy
✩
✩
✩
✩
✩
Horizontal louver can not revolve
Test method / remedy
Clean coil
Check f
an
Change char
ged r
efr
iger
ant v
olume
Clean condenser or r
emo
ve obs
tacle
Pur
ge, e
vacuat
e and r
echar
ge
Check the air flo
w f
or obs
tacles
Check the air flo
w f
or obs
tacles
Check the dr
ain pipe
Check the com
pr
es
sor and r
eplace if def
ect
Check the com
pr
es
sor oper
ation
Check the e
xpansion v
al
ve and r
eplace if def
ect
Check the e
xpansion v
al
ve and r
eplace if def
ect
Check the e
xpansion v
al
ve and r
eplace if def
ect
Fix f
eeler bulb
Check the heat calculation
Tight
en bolts or scr
ew
s
Remo
ve packing mat
er
ial
Check the building load calculation
Check if the com
pr
es
sor is t
ouching ano
ther com
ponent and
cor
rect
Table 16.