6-4
Symptom
Checkpoint
Remedy
Cause
Indicator flashes
when the RS is
-10˚C or less
during frozen
operation
Refrigerant
shortage
Blocked pipe (parts)
(including solenoid
valves)
Trap of air in
refrigerant system
The high
pressure is
excessively
high
Faulty discharge
pressure control
valve DPR
The low
pressure is
excessively low
Faulty liquid
solenoid valve LSV
Blocked dryer
The low
pressure is
excessively
high
Entering of air
Frosted
compressor
body or suction
pipe
Faulty high
pressure transducer
HPT
Gas leak check
Gas leaks
⇒
Restore the gas leaking portion
NO
Is the difference in pressure
between the ports
w
and
t
1000 kPa
or more?
Clogged section between the ports
w
and
t
or DRP operation is faulty
⇒
Replace the DPR
NO
Is the difference in pressure
between the ports
t
and
e
100 kPa
or more?
Blocked section between the ports
t
and
e
or blocked LSV
⇒
Replace the LSV
NO
Is the difference in
temperature of the pipe in front of
and that back of dryer filter 5˚C
or more?
Check for clog in a dryer
⇒
Replace the dryer
NO
Check for
entering of air referring
to clause 4.1.4 (2)
Air is entering
⇒
Replace refrigerant
NO
Is the difference in pressure
between the pressure gauge and
HPT 100 kPa or more?
Faulty HPT
⇒
Replace the HPT
NO
Gas shortage
⇒
Replace the refrigerant
Note: Recover refrigerant when
replacing it
YES
YES
YES
YES
YES
YES
Ⅲ
Inside temperature does not drop
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