Hitachi RAS-E10H2 - Page 62

< Ref
erence
>
When operation stop with LD301 b
links 12 times
, it ma
y be caused b
y f
aulty DC
fa
n motor.
In
this
case
,
please
chec
k
CN6
and
CN12
connection
first.
It
mak
es
Fa
n
Motor
Lo
ck
also
if
those
connectors are in misconnection.
DC
Fan
Motor
has
broken
invites
1A
Fuse
burned.
Please
replace
both
DC
Fan
Motor
and
1A
Fuse
togethe
r.
It
will
makes
“Fan
Lock
Stop”
when
something
has
disturb
the
Fan
rotation
by
inserting
materials
into
propeller f
an or ice has gr
ow
ing inside of outdoor unit
by
sno
wing.
unit will be restar
t again after a while
.
In
case
of
“
F
an
Loc
k
Stop
”
ev
en
though
the
DC
F
an
Motor
is
rotating
correctly
,
correctly, correctly
the
possib
le
cause
in
Fa
n
Motor problem or control board problem. Stop after the Fan motor runs 2 minutes, Fan Motor may be
broken.
< Caution
>
Please
tak
e
care
f
or
the
electr
ical
shoc
k
by
high
v
oltage
of
DC
F
an
Motor
po
w
er
source
which
is
common
with compressor when
yo
u are ser
vicing this unit.
Y
ou can not confir
You can not confirY
m the coil and wi
ri
ng of Motor directly due to the
bu
ilt in control circuit in
Fa
n Motor.
It may make “Fan Lock Stop” by strong wind (ex.17m/sec. or above) against the Fan rotation. In this case
COOLING MODE
The compressor has
Fan speed is not switched over
during dehumidifying operation.
Cool air comes from the unit during
dehumidifying operation.
Fans speed is normally set to LOW during
dehumidifying operation.
To have an operation with high dehumidifying
effect, the unit operates at low fan speed.
As a result, cool air comes from the unit.
This phenomenon is not a fault.
stopped suddenly during
cooling operation.
The circulation stops
occasionally during
Heating mode.
When the fan speed is set
at HIGH or MED, the flow
is actually Weak.
Heating operation stops
When “Auto fan” mode is set,
the indoor fan speed changes
from HIGH through MED to
LOW.
while the temperature is
preset at "30".
Check if the indoor heat
exchanger is frosted.
Wait for 3-4 minutes
until it is defrosted.
If the air conditioner operates
in cooling mode when it is
cold,
the evaporator may get
frosted.
It occurs during defrost
-
ing. Wait for 5-10
minutes until th
e
condenser is defrosted.
At the beginning of heating,
the fan speed remains
LOW for 30 seconds.
If
HIGH is selected, it
switches to LOW and again
to MED after additional 30
seconds.
If temperature is high in
This is not an error.
The anti cool air function
shows this phenomenon.
In the fan “Auto” mode, the unit
detects the heat exchange
temperature. When the
temperature becomes low,
the fan speed changes from
HIGH, through MED to LOW.
the outdoor, heating
operation may stop to
protect internal devices.
DEHUMIDIFYING MODE
HEATING MODE
Q1
A1
Q2
A2
Q3
A3
Q4
A4
Q5
A5
Q6
A6
Q7
A7
SERVICE CALL Q & A
MODEL RAS-E10H2 / RAC-E10H2
- 66
-