Hitachi RAC-18WSPA, Service Manual

Page: 12 / 101

s
If the unit still fails to operate normally after performing the above inspections, turn the circuit break
er off
, or pull the
power plug out, and contact y
our sales agent immediately
.
Contact y
our sales a
g
ent immediatel
y if the
follo
wing phenomena should occur:
s
The circuit break
er s
witches off or the fuse b
lo
w
s
frequently
.
s
The s
witch oper
ation is not stab
le
.
s
F
oreign matter or w
ater accidentally enters the unit inter
ior
.
s
The po
w
er cord gets e
xcessiv
ely hot or its insulation is tor
n or str
ipped.
s
TIMER lamp on the indoor unit displa
y b
links
.
As the nature of the f
ailure can be identified b
y the b
linking cycle
,
chec
k the b
linking cycle bef
ore tur
ning off the circuit break
er
.
(
)
Notes s
In quiet oper
ation or stopping the r
unning, the f
ollo
wing phenomena ma
y
occasionally occur
, b
ut the
y are not abnor
mal f
or the oper
ation.
(1)
Slight flo
wing noise of refr
igerant in the refr
iger
ating cycle
.
(2)
Slight r
u
b
bing noise from the f
an casing which is cooled and then
g
radually w
a
rmed as oper
ation stops
.
s
The odor will possib
ly be emitted from the room air conditioner because
the v
a
rious odor
, emitted b
y
smok
e
, f
oodstuffs
, cosmetics and so on,
stic
ks to it.
So please clean the air filter and the e
v
apor
ator regular
ly to
reduce the odor
.
Noise of the ventilation fan sucking in air present in the drain hose and blowing out dehumidifying w
ater that had accumulated in the condensed w
ater collector
. F
o
r
details, consult your sales agent. Operation noise changes due to power variations according to room temperature changes. Mist is generated as the air within the room is suddenly cooled b
y conditioned air
.
W
ater gener
ated dur
ing defrosting oper
ation e
vapor
ates and steam is emitted.
Caused as the smells and particles of smoke, food, cosmetics, etc. present in room air become attached the unit and b
lo
w
n off into the room again.
Defrosting is underway (as the heating operation is stopped, the microcomputer checks frost accumulated in the outdoor unit and instructs the unit to perform automatic defrosting if necessary). Sho
ws preheating or defrosting oper
ation is underw
ay
.
As the protective circuit or preheat sensor operates when unit operation is stopped during preheating and then restarted, or when operation mode is switched from cooling to heating, the lamp continues to blink. Actual room temperature may deviate slightly from the remote controller's temperature setting depending on the number of people in the room, indoor or outdoor conditions.
s
Please contact your sales agent immediately if the air conditioner still fails to operate normally after the abo
v
e
inspections
. Inf
or
m y
our agent of the model of y
our unit, production n
umber
, date of
installation.
Please also inf
or
m him regarding the f
ault.
Please note: On s
witching on the equipment, par
ticular
ly when the room light is dimmed, a slight br
ightness
fluctuation ma
y occur
. This is of no consequence
.
The conditions of the local P
o
w
er Supply Companies are to be obser
v
ed.
Does not reach the temper
ature
setting
Mist emission
P
e
rking noise
Changing operation noise Steam emitted from the outdoor unit The outdoor unit contin
ues to oper
ate
e
ven if oper
ation is stopped.
Odors The OPERA
TION lamp is b
linking.
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