3. CHECKING COMPONENTS
Heating mode
Test system
pressure
. Is the high
pressur
e normal
at
servic
e part
?
The pressure on the
high side.
The pressure on the
low side.
Recharge refrigerant
after
ai
r purging w
ith
t
he vacuum
pump
.
Is
t
he high
pr
essu
re nor
m
al
ove
r
agai
n
?
Air
remains at the
refrigerant system.
yes
T
he system
needs
refrigerant
. The service
peopl
e must add
refrigerant
. Does
the
high pressur
e ris
e in
heating mode?
NO
Recharge refrigerant
yes
If the pressure is close
to static pressure?
4-way valve collude or
compressor exhaust every
ebb.
yes
Check heat exchanger and
4-way valve.
NO
The capillary t
ube is
blocked
.Unsolder
the
capillary
t
ube ASS
'Y. The
capillary
tube
1 and capillary
tube
2 is
blow
n by
N
2
.
NO
Remove the back
panel."see"the
capillary tube1 and
capillary tube2. Is it
defrosting?
yes
NO
3.2 Check parts unit
1. Indoor unit fan motor
Ducted motor model (DC motor)
1.0HP/1.5HP(9K/12K): SIC-68CVL-F140-1
2.0HP(18K): SIC-68CVL-F160-2
3.0HP(24K): SIC-70CW-F195-1
4.0HP(36K): SIC-101CW-F1250-4
Cassette motor model (DC motor)
1.0/1.5HP(9K/12K):SIC-62FW-D857-15
2.0/3.0HP(18K/24K): EHDS50AQH
4.0HP(36K): SIC-72FW-D8124-2B
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