Alarm Codes On Electronic Controller - Daikin LXE10E-A Service Manual

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6.2 Alarm codes on electronic controller

If any alarm occurs, search its cause and repair it referring to the following table.
Be sure to check the connectors in the electronic controller as the poor contact of them may cause the
controller alarm codes.
Alarm code
The high-pressure switch (HPS) contact is open HPS circuit check
F101
The HPS activates within 20 seconds after the
compressor starts
The fuse Fu1 is blown
Faulty controller
The LPT is decreased to -85 KPA or less within
F109
2 seconds after the compressor starts
F111 The high pressure switch does not activate at
set value
Temperature setting request
F301
Supply air temperature sensor SS fault
F401
Return air temperature sensor RS fault
F403
Faulty operation of suction modulating valve
F603
Wrong controller model setting
Abnormal power supply voltage
F701
S phase is open phase
F705
Any of following alarm codes are displayed twice
F803
or more: E101, 103, 105, 107, 109, 203, 205
High-pressure switch (HPS) activates during
E101
operation
Content
・Broken lead wire
・Faulty contact
・Blown fuse Fu1
Condenser fan motor operation check
Discharge piping refrigerant circuit check
・Discharge stop valve
・Discharge filter
・Discharge check valve
・Discharge pressure regulating valve
Fuse Fu1 circuit check
Faulty controller
Refrigerant circuit check
・Suction stop valve
・SMV (Suction modularing valve)
・EV (Electronic expansion valve)
・LSV (Liquid solenoid valve)
・Dryer
・Clogged EV, LSV inlet filter
Low pressure transducer LPT circuit check
・Fu3, LPT fault, broken lead wire disconnection, short circuit
Shortage of refrigerant
Faulty controller
Disconnection of high pressure switch
Disconnection of high pressure transducer
Set temperature has not been set up yet
(Set up the temperature when the controller is replaced)
Faulty controller (SRAM fault)
Faulty SS and RS
・Broken or short-circuited lead wire
・Faulty wiring (incomplete connection of connector)
・Faulty sensor
Faulty sensor (faulty CPU PCB)
Faulty SMV body
・Broken coil
Faulty driving circuit
・Disconnection of connector
・blown Fu7, 4
・Faulty PCB for suction modulating valve (EC6)
DecosⅢ "c" or "d" for LXE10E
DecosⅢ "b" for LXE10D
Abnormal power supply voltage
・530 V or more
Faulty voltage detection
・Faulty PT of PC/CT board (other than disconnection and short-circuit)
・Faulty contact of connector
・S phase is open phase
Abnormal power supply voltage
・S phase is open phase
・Faulty contact of power supply facility
Faulty power supply equipment
・Faulty contact of power plug
・Faulty contact of power cable
・Faulty PT/CT board (EC5)
Find the cause of the alarm for each of the issued alarm codes
Refer to the "The inside temperature does not decrease" and "The
high pressure is excessively high" in "6.Troubleshooting"
6-13
Possible cause/checkpoint