Daikin LXE10E-A - Page 150

6-8
Symptom Checkpoint RemedyCause
Ⅳ Inside temperature does not rise (during heating operation)
The high
pressure is
excessively low
The discharge
gas temperature
is low
The low
pressure is
excessively high
YES
YES
Is the outlet piping of HSV,
DSV cold?
Is the difference in pressure
between the pressure gauge and
HPT 100 kPa or more?
Is the difference in pressure
between the pressure gauge
and LPT 30 kPa or more?
Is the DCHS or heat
insulator installed
inappropriately?
Faulty operation of HSV,
DSV⇒Replace
Faulty HPT
⇒Replace
NO
NO
YES
Faulty LPT
⇒Replace
NO
NO
Is the magnetic
contactor (high speed) for
evaporator fan motor
turned OFF?
Is the evaporator fan motor
stopped?
YES
Faulty motor
⇒Replace
YES
Faulty DCHS temperature
detection
⇒Replace
YES
Correct installation of
DCHS
NO
NO
NO
HPT＜700kPa ?
YES
Leak from DPR
⇒Replace the DPR
Leak from ISV
⇒Replace the ISV
Heating operation
※ DCHS: Discharge pipe temperature sensor
Faulty operation of
valve
(HSV or DSV)
Faulty operation of
high pressure
transducer HPT
(charging is
impossible)
Leak from ISV⇒
Charge control is
unavailable
Faulty operation of low
pressure transducer
LPT (charging is
impossible)
Displacement of
HPT, DCHS
(Stop of evaporator
fan)
Stop of evaporator
fan
Reduced heating air
volume
(stop or drop of
evaporator fan)
Pressure leak to
condenser due to leak
from discharge pressure
control valve (DPR)
06LXE10E-A(1-27)07.2.233:11PMページ6-8
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