LG HMC036KDT1 Service Manual - Page 34

Cycle, Troubleshooting, Guide, Trouble, analysis, Multi, Conditioner

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Cycle Troubleshooting Guide I Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. Difference Operating Current Temp. difference : approx. 0°C Current : less than 80% of rated current All amount of refrigerant leaked out. Check refrigeration cycle. Temp. difference : approx. 8°C Current : less than 80% of rated current Refrigerant leakage Clog of refrigeration cycle Defective compressor Temp. difference : less than 8°C Current :over the rated current Excessive amount of refrigerant Temp. difference : over 8°C Normal Notice: Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger. 2. Check temperature and pressure of refrigeration cycle. Suction pressure (Compared with the normal value) Higher Temperature (Compared with the normal value) High Normal Lower Higher Cause of Trouble Description Defective compressor Current is low. Defective 4-way reverse valve Excessive amount of refrigerant High pressure does not quickly rise at the beginning of operation. Insufficient amount of refrigerant(Leakage) Clogging Current is low. Current is low. Notice: 1. The suction pressure is usually 4.5-6.0 kg/cm'G at normal condition. 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. 34 MPS Multi Air Conditioner

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Cycle
Troubleshooting
Guide
I
Cycle
Troubleshooting
Guide
Trouble
analysis
1.
Check
temperature
difference
between
intake
and
discharge
air
and
operating
current.
Temp.
Difference
Operating
Current
Temp.
difference
:
approx.
0°C
Current
:
less
than
80%
of
rated
current
Temp.
difference
:
approx.
8°C
Current
:
less
than
80%
of
rated
current
Temp.
difference
:
less
than
8°C
Current
:over
the
rated
current
Temp.
difference
:
over
8°C
All
amount
of
refrigerant
leaked
out.
Check
refrigeration
cycle.
Refrigerant
leakage
Clog
of
refrigeration
cycle
Defective
compressor
Excessive
amount
of
refrigerant
Normal
Notice:
Temperature
difference
between
intake
and
discharge
air
depends
on
room
air
humidity.
When
the
room
air
humidity
is
relativery
higher,
temperature
difference
is
smaller.
When
the
room
air
humidity
is
relatively
lower
temperature
difference
is
larger.
2.
Check
temperature
and
pressure
of
refrigeration
cycle.
Suction
pressure
(Compared
with
the
normal
value)
Temperature
(Compared
with
the
normal
value)
Cause
of
Trouble
Description
Higher
High
Defective
compressor
Defective
4
-way
reverse
valve
Current
is
low.
Normal
Excessive
amount
of
refrigerant
High
pressure
does
not
quickly
rise
at
the
beginning
of
operation.
Lower
Higher
Insufficient
amount
of
refrigerant(Leakage)
Clogging
Current
is
low.
Current
is
low.
Notice:
1.
The
suction
pressure
is
usually
4.5-6.0
kg/cm'G
at
normal
condition.
2.
The
temperature
can
be
measured
by
attaching
the
thermometer
to
the
low
pressure
tubing
and
wrap
it
with
putty.
34
MPS
Multi
Air
Conditioner