LG HMC036KDT1 Service Manual - Page 41

Outdoor, operate, Communication

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Electronic Parts Troubleshooting Guide 7. Outdoor unit does not operate at all. Check Outdoor Unit Items • Power Transformer (Outdoor unit) - Input Voltage - Output Voltage 4, • ICO1D(7812) Output (Indoor/Outdoor unit) 40 • IC02D(7805) Output (Indoor/Outdoor unit) 4, • IC01A(KIA7036, Reset IC) X01(8MHz) PCB Board Operation Check in Outdoor Content Remedy - About AC220V/240V±10% - Check the power voltage • Replace Trans - About AC14±3V • DC +12V - Replace IC010 • DC +5V • Replace IC02D • Replace faulty parts Turn off Main Power • Check the electrical wiring diagram of outdoor side. • Check the abnormal condition for the component of Compressor/Outdoor Fan Motor/4-way. • Check the "open" or "short" of connecting wires between indoor and outdoor. 8. Communication e • The control data can be transmitted or received between indoor and outdoor unit with one signal cable. - If the data be disturbed by any noise level and misconnection, the unit will be operated incorrectly. In this case, the indoor unit blinks the operation and operation LED on display and indoor fan, outdoor fan, COMP are not operated. • The unit can be reoperated by On/Off control of Remocon. Service Manual 41

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Electronic
Parts
Troubleshooting
Guide
7.
Outdoor
unit
does
not
operate
at
all.
Check
Outdoor
Unit
PCB
Board
Operation
Check
in
Outdoor
Items
Content
Remedy
•
Power
Transformer
(Outdoor
unit)
-
About
AC220V/240V±10%
-
Check
the
power
voltage
•
Replace
Trans
-
Input
Voltage
-
About
AC14±3V
-
Output
Voltage
4,
•
DC
+12V
-
Replace
IC010
•
ICO1D(7812)
Output
(Indoor/Outdoor
unit)
40
•
DC
+5V
•
Replace
IC02D
•
IC02D(7805)
Output
(Indoor/Outdoor
unit)
4
,
•
Replace
faulty
parts
•
IC01A(KIA7036,
Reset
IC)
X01(8MHz)
Turn
off
Main
Power
•
Check
the
electrical
wiring
diagram
of
outdoor
side.
•
Check
the
abnormal
condition
for
the
component
of
Compressor/Outdoor
Fan
Motor/4-way.
•
Check
the
"open"
or
"short"
of
connecting
wires
between
indoor
and
outdoor.
8.
Communication
e
•
The
control
data
can
be
transmitted
or
received
between
indoor
and
outdoor
unit
with
one
signal
cable.
-
If
the
data
be
disturbed
by
any
noise
level
and
misconnection,
the
unit
will
be
operated
incorrectly.
In
this
case,
the
indoor
unit
blinks
the
operation
and
operation
LED
on
display
and
indoor
fan,
outdoor
fan,
COMP
are
not
operated.
•
The
unit
can
be
reoperated
by
On/Off
control
of
Remocon.
Service
Manual
41