Daikin LXE10E136 - Page 142

6-6
Symptom Checkpoint RemedyCause
The low
pressure is
excessively low
・Faulty opening of
electronic
expansion valve
(EV)
・Faulty opening of
suction
modulsting valve
(SMV)
・ Low air volume
(frosted
evaporator)
Low air volume
(reverse rotation of
evaporator fan)
Low air volume
(stop of evaporator
fan)
Low air volume
(drop of propeller
fan)
Displacement of discharge
pipe temperature sensor
DCHS (detection of
humidity)
Faulty electronic
expansion valve coil
Entering of water in
refrigerant system
Water choke
Ⅲ Inside temperature does not drop
NO
Normal
Normal
Normal
NO
Is suction
and discharge
air reversed when
the ventilator
is opened?
Is the DCHS sensor
installed inappropriately?
Faulty
resistance of
electronic expansion
valve coil
(46Ω phase)
YES(Inappropriate)
NO(Correct)
Correct installation of sensor
YES(Inappropriate)
Replace the electronic expansion valve coil
Reset opening of EV, SMV
(Circuit breaker ON)
Is pull-down possible?
Is pull-down possible?
NO(Fan rotates normally)
Check the wiring of magnetic
contactor for evaporator fan
YES(Fan rotates reverse)
Is the current at
evaporator fan motor 0?
(on the secondary side of
magnetic contactor)
Replace the fan motor
Install the propeller fan
Is pull-down possible?
NO(Normal)
NO
Continue to next page
YES
Open the access
panel and check if
the evaporator fan
blade is removed
YES
YES
YES
YES
Manual defrost
NO
NO
NO
* See page 7-1
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