LG LM-1963H2L Service Manual ▷ View online
–11–
8. Defrost Control
• Defrost operation is controlled by timer and sensing the outdoor piping temperature.
• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
• The defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting
of heating operation.
• Defrost ends after 9 minutes 30 seconds passed from starting of defrost operation or when the outdoor pipe
temperature rises over 12°C even if before 12 minutes.
More than 45 minutes
of heating operation
Within
9min. 45sec.
ON
OFF
ON
ON
ON
ON
OFF
OFF
COMPRESSOR
4-WAY VALVE
INDOOR FAN
-6
°
C ON
12
°
C OFF
The outdoor
piping Temp.
ON
More than 10 min.
running of compressor
More than 45 minutes
of heating operation
5sec.
HOT-
START
ON
9. Self-Diagnosis Function
• 'CHECK' will flash in the remote controller display when a problem occurs. Then please contact your dealer.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
Remote controller LCD
Accident Point
F
1
Indoor temperature thermistor error
F2
Indoor piping thermistor error
F3
Indoor/Outdoor unit communication error
F4
Water level float switch error
–12–
Installation of Indoor, Outdoor Unit
1. Selection of the best location
1) Indoor unit
• There should not be any heat source or steam
near the unit.
• There should not be any obstacles to prevent
the air circulation.
• A place where air circulation in the room will be
good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into
• A place where noise prevention is taken into
consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the
• Ensure the spaces indicated by arrows from the
wall, ceiling, or other obstacles.
• The indoor unit must keep the maintenance
space.
2) Outdoor unit
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful that
heat radiation from the condenser is not restrict-
ed.
heat radiation from the condenser is not restrict-
ed.
• There should not be any animals or plants which
could be affected by hot air discharged.
• Ensure the spaces indicated by arrows from the
wall, ceiling, fence or other obstacles.
More than
10cm
More than 10cm
More than
70cm
,,
Unit:cm
Ceiling
Ceiling Board
Ceiling Board
30 or more
Above 250
300 or less
100
or more
50 or
more
50 or
more
30 or less
,,,
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Floor
–13–
Indoor unit
Outdoor unit
B
A
MODEL
24K, 28K BTU 5/8"
3/8"
7.5
20
GAS LIQUID
7.5
15
50
Elevation B(m)
Length A(m)
* Additional
refrigerant
(g/m)
Pipe Size
Rated
Rated
Max.
Max.
• If this Model is installed at a distance of 15m, 375g of
refrigerant should be added.....................................(15-7.5)x50g
NOTE:
• Thoroughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the
turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction,
spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
capacity so that it draws oily steam which should not flow into the suction of the air conditioner.
• Make enough distance from a cooking room to install the air conditioner in such a place where it
may not suck in oily steam.
2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is in sus-
pension in factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
3) Piping length and the elevation
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance
distance
–14–
• The dimensions of the paper model for installing are
the same as those of the ceiling opening dimen-
sions.
sions.
• Select and mark the position for fixing bolts and pip-
ing hole.
• Decide the position for fixing bolts slightly tilted to
the drain direction after considering the direction of
drain hose.
drain hose.
• Drill the hole for anchor bolt on the wall.
,,,
Level gauge
Unit:mm
Ceiling
800 Unit size
800 Unit siz
e
720 (Hanging bolt)
60
60
840 (Ceiling opening)
840 (Ceiling opening)
624(Hanging bolt)
108
108
600
120
120
Ceiling board
• This air-conditioner uses a drain pump.
• Horizontly install the unit using a level gauge.
• During the installation, care must be taken not to
• Horizontly install the unit using a level gauge.
• During the installation, care must be taken not to
damage electric wires.
CAUTION
2. Ceiling opening dimensions and hanging bolt location
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