CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
41
Troubleshooting
2.Field Maintenance
Electrical Circuit
Refrigerant Circuit
Possible causes of trouble
Po
w
er f
ailur
e
Blo
wn fuse or v
ar
is
tor
Loose connections
Shor
ted or br
ok
en wir
es
Saf
ety de
vice opens
Faulty ther
mos
tat / r
oom t
em
per
atur
e sensor
W
rong se
tting place of t
em
per
atur
e sensor
Faulty tr
ansf
or
mer
Shor
ted or open capacit
or
Faulty com
pr
es
sor cont
act
Faulty f
an cont
act
Lo
w v
olt
age
Faulty s
tepping mo
tor
Shor
ted or gr
ounded com
pr
es
sor
Shor
ted or gr
ounded f
an mo
tor
Com
pr
es
sor s
tuck
ed
Shor
tage of r
efr
iger
ant
Res
tr
ict
ed liq
uid line
Dir
ty air filt
er
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
Check po
w
er suppl
y
Check fuse type & size
Check connections - tight
en
Check wir
ing
Check saf
ety functions
Check ther
mos
tat, sensor and wir
ing
Check the cor
rect position of the t
em
per
atur
e sensor
Check cir
cuit boar
d
Check capacit
or with t
es
ter
Check the cont
acts
Check the cont
acts
Tes
t v
olt
age
Check the s
tepper mo
tor and r
eplace if def
ect
Check r
esis
tance with multime
ter
Check r
esis
tance with multime
ter
Check the com
pr
es
sor and r
eplace if def
ect
Per
for
m leak
age t
es
t
Check liq
uid pipe and cor
rect
Clean or r
eplace
Table 15.
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