Hitachi RAC-18YH4, Service Manual

Page: 8 / 99

– 6 –
– 8 –
INDOOR UNIT
Air filter To
pre
v
ent dust from coming into the indoor unit.
(Ref
er page 20)
Fr
ont panel
Indoor unit indicator
s
Light indicator sho
w
ing the oper
ating condition.
(Ref
er page 9)
Horizontal deflector
V
er
tical deflector
(Air Outlet) (Ref
er page 19)
Remote contr
oller
Send out operation signal to the indoor unit. So as to operate the whole unit. (Ref
er page 10)
MODEL NAME AND DIMENSIONS
OUTDOOR UNIT
Air outlet When
“heating”
oper
ation is
performed, cool air blows and when “cooling”
or
“dehumidifying” operation is performed, warm air blows.
Drain hose Drains the dehumidified water from the indoor unit to the outdoor dur
ing “cooling”
or “dehumidifying”
operation.
Piping and
Wiring
Air inlets (Rear and left sides)
About the outdoor unit: •
When
“Stop” is selected during operation of the indoor
unit, the f
an of the outdoor unit contin
ues tur
ning f
or
10 to 60 seconds to cool the electr
ic par
ts do
wn.
•
In heating operation,
condensate or w
ater due to
defrosting will flo
w
.
Do not cover the drain port of the outdoor unit because such w
ater ma
y freez
e in the chilly area.
•
When the outdoor unit is hung on the ceiling, install the bush and drain pipe on the drain port and drain w
ater
.
Drain por
t
(Bottom)
Ear
th terminal
(Lo
wer section of the side)
MODEL
WIDTH (mm)
HEIGHT
(mm)
DEPTH (mm)
RAS-18YH4 RAC-18YH4
780
280
205
750
548
288
NAMES AND FUNCTIONS OF EACH P
A
R
T
– 9 –– 5 – – 9
–
NAMES AND FUNCTIONS OF EACH
P
A
R
T
INDOOR UNIT INDICATIONS
TIMER LAMP (Orange) This lamp lights when the timer is working
.
FIL
TER LAMP (Green)
When the de
vice is operated
for a total of about 200
hours
, the FIL
TER lamp lights indicates that it is time
to clean the filter
.The lamp goes out when the
“
(A
UT
O SWING)”
b
utton is pressed while the
operation is stopped. OPERA
TION LAMP (Y
ello
w)
This lamp lights during operation. The OPERA
TION LAMP flashes in the f
ollo
wing
cases during heating. (1)
During preheating For about 2-3 minutes after starting up
.
(2)
During defr
osting
Defrosting will be performed about once an hour when frost forms on the heat exchanger of the outdoor unit, for 5-10 minutes each time.
TEMPORAR
Y SWITCH
Use this switch to start and stop when the remote controller does not work.
CAUTION
Tu
rn
off the circuit break
er or pull out
the po
w
er plug if the unit is not be
operated
fo
r a long period.
If the power stays on and the unit is not operated, power is slightly consumed in the control circuit. The pow
er is sa
v
ed b
y
tur
ning off the po
wer
s
witch (or the circuit breaker
when the pow
er is supplied
from the outdoor unit). Attaching the air
c
leansing and deodorizing filter
s (Accessories) to the filter frame
.
•A
ttach the air cleansing and deodorizing filters to the fr
ame b
y
gently compress its both sides and release after inser
tion into
filter frame
.
•
The cooling capacity is slightly w
eak
ened and the cooling speed
becomes slo
w
er when the air cleansing and deodor
izing filters
are used.
•
Frame
PO
WER SWITCH
Air cleansing and deodorizing filters can be used for about 1 year. When you want to renew it, please ask your sales agent.
• •
☆
This temporary operation will be at the most recent setting made. (The unit immediately go into automatic operation once power is switched on.)