Daikin LXE10E-A14 Service Manual page 132

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State Malfunction occurrence
C. Condenser fan rotates, q Activation of
but evaporator fan and
compressor do not
rotate.
A. Suction pressure is
high
B. Suction pressure is
excessively low
C. Economizer circuit
does not function
D. Defrosting is not
initiated.
Abnormal point
high-pressure switch
(Water cooled
condenser type)
Electronic overcurrent
w
protection device, PT/CT
board actuation
e Abnormal low
pressure drop
r Abnormal discharge
gas temperature
q Poor compression of compressor
w Hot gas solenoid valve Valve leakage
e Defrosting solenoid valve Valve leakage
r Discharge gas
by-pass solenoid valve
t Electronic expansion valve Electronic expansion valve malfunction
y Injection solenoid valve Valve leakage
q Liquid solenoid valve (Not opened) Solenoid valve coil malfunction
w Shortage of refrigerant charge Refrigerant leakage
e Drier
r Suction modulating valve Coil wire breakage
t Electronic expansion valve Valve blocked with moisture
y Evaporator
Economizer solenoid valve
q Manual defrost key
w Evaporator outlet sensor Incorrect installation of sensor
e Defrosting solenoid valve Valve blocked with contamination
r No trouble with unit
6-2
Possible cause
Short circuit of condenser fan motor
Wrong installation of condenser fan
Reverse rotation of condenser fan
Insufficient cooling water flow rate
Water-cooled condenser blocked with scale
Overcurrent due to overload operation, etc.
Electronic expansion valve: poor contact of connector
Electronic expansion valve: incorrect opening
Electronic expansion valve: blocked
Suction modulating valve: blocked
Dryer: blocked
Hot gas solenoid valve: coil wire broken
Injection solenoid valve: closed
Injection capillary tube: blocked
High pressure increasing due to overload
Abrasion of scroll slide section
Valve leakage
Poor contact of connector
Drier blocked with contamination
Disconnection of connector
Valve blocked with contamination
Breakage of coil lead wire or disconnection of connector
Lead wire breakage or miss-mounting of evaporator inlet or outlet sensor
Electronic expansion valve malfunction
Abnormal frosting
Insufficient air flow rate in the evaporator
Air passage blocked by foreign material
Evaporator fan motor malfunction
Evaporator fan damage or fall out
Air short circuit around the evaporator
Reverse rotation of evaporator fan motor
Solenoid valve coil malfunction
Valve blocked with contamination
Poor contact of connector
Valve coil malfunction
Defrost interval is set to 99 H
(Demand/defrost setting)