Daikin LXE10E-A Service Manual page 148

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Symptom
The low Faulty opening of
pressure is electronic
excessively low 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
Ingress of water in
refrigerant system
Water choke
Cause
Reset opening of EV, SMV
(Circuit breaker ON)
Is pull-down possible?
Manual defrost
Is pull-down possible?
Is drawn
and discharged
air reversed when
the ventilator
is opened?
Is the current at
evaporator fan motor 0?
(on the secondary side of
magnetic contactor)
Open the access
panel and check if
the evaporator fan
blade is removed
Is the DCHS sensor
installed inappropriately?
resistance of
electronic expansion
valve coil
(150Ω phase)
Is pull-down possible?
Continue to next page
6-6
Checkpoint
YES
Normal
NO
NO
YES
Normal
NO
YES(Fan rotates reverse)
Check the wiring of magnetic
contactor for evaporator fan
NO(Fan rotates normally)
YES
Replace the fan motor
NO
YES
Install the propeller fan
NO
YES(Inappropriate)
Correct installation of sensor
NO(Correct)
Faulty
YES(Inappropriate)
Replace the electronic expansion valve coil
* See page 7-1 (type A) or
NO(Normal)
YES
Normal
NO
Remedy
page 7-2 of TR03-1A (type E-1).