Daikin LXE10E-A Service Manual page 152

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Symptom
Temperature
continues to
decrease
・Disconnection of
fuse (Fu2) circuit
・Faulty operation
of defrost solenoid
valve DSV
・Stop of
evaporator fan
・Faulty operation of suction
modulating valve SMV
Temperature
continues to
increase
・Excessive frost
on evaporator
・Opened discharge
gas bypass
solenoid valve BSV
(dusts caught in)
・Excessive frost
on evaporator
Malfunction of
Abnormal noise
compressor inside
Fan motor of
evaporator, condenser
・Worn bearing
・Interference with
fan guide
Compressor, fan
Abnormal motor
vibration
・Loosen bolt
Piping
・Removed or
loosen cramp
Cause
Temperature continues
to decrease
Check for disconnection
in the Fu2 circuit
Is the DSV outlet
pipe cold?
The evaporator fan stops
Check the SMV
Temperature continues
to increase
Is the opening of the
SMV 36% or more?
Is the BSV outlet
Manual defrost
Auditory check
Auditory check
Auditory check
Visual check
Auditory check
Visual check
Auditory check
Visual check
6-10
Checkpoint
YES
NO
YES
NO
YES
NO
NO
YES
YES
pipe hot?
NO
※ As for the manual defrost, refer to page 2-23.
Remedy
Replace the Fu2
Check operation of the DSV
⇒Replace the DSV
Check the fan motor
Check operation of the BSV
⇒Replace the BSV
Replace
Replace the unit
Replace the faulty parts
Tighten bolts
Correct the cramp