Daikin LX10F10A, Service Manual

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Symptom Cause Checkpoint Remedy
Ⅲ
Inside temper
ature does not drop
.
Sight glass flashes
when the RS is 0
℃
or less during frozen
operation.
The high pressure is
excessively high.
The low pressure is
excessively low.
The low pressure is
excessively high.
Frosted compressor
body or suction pipe
Refrigerant shortage
Blocked pipe (parts)
(including solenoid
valves)
Entering of air in
refrigerant system
Clogging of discharge
pipe system
(Compressor to
condenser)
Faulty liquid solenoid
valve LSV
Blocked dryer
Entering of air
Faulty high pressure
transducer HPT
Gas leak check
Gas leaks
⇒ Repair the gas leaking location.
NO
Is the difference
in pressure between the ports
② and ④ 1000 kPa
or more?
Clogging of discharge pipe system
Clogged section between the ports
② and ④ or DRP operation is faulty.
⇒ Replace the DPR. (Strainer, DMV
and check valve)
NO
Is the difference
in pressure between the ports
④ and ③ 100 kPa
or more?
Blocked section between the
ports
④ and ③ or blocked LSV
⇒ Replace the LSV.
NO
Is the
difference in
temperature of the pipe in
and out of dryer filter
5 ° C or more?
Check for clogging in a dryer
⇒ Replace the dryer.
NO
Check for entering of air
referring to paragraph 4.4.
Air is entering
⇒ Replace refrigerant.
NO
Is the
difference in pressure
between the pressure gauge
and HPT 100 kPa
or more?
HPT failure
⇒
Replace HPT.
NO
Gas shortage ⇒ Replace the refrigerant.
Note: Recover refrigerant when
replacing it.
YES
YES
YES
YES
YES
YES
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