Alarm Codes On Electronic Controller - Daikin LXE10E-A14 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 Content
F101 The high-pressure switch (HPS) Discharge pressure regulation valve is defective.
activates within 30 seconds
after the compressor start or
the protection devices activates High-pressure switch contact is defective.
five times at unit start-up.
F109 Low pressure lowers abnormally Liquid solenoid valve coil is broken.
within 2 seconds after
compressor started.
F111 High-pressure switch (HPS)
does not activate at set value.
F301 Temperature setting request
F401 In the chilled or partial frozen
F403 mode, the supply air sensor
(SS) and return air sensor (RS) Both sensors defective
is defective.
F603 The suction modulating valve does not
fully close although it is set to be full-close. Suction modulating valve malfunctions.
F701 Abnormal power voltage Note) 1.
F705 S phase is open phase
F803 Any following malfunction
codes are counted 10 times
E101 E103 E107
E109 E203 E707
E101 High-pressure switch (HPS)
activated during operation.
E103 Electronic overcurrent protection Compressor lock
device (electronic OC) actuates. CPU board malfunction
Note1: If S phase is open, F701 may occur. When F701 and F705 are displayed together, inspect the S
phase for opening.
Check valve is blocked.
Lead wire of the high-pressure switch is broken.
High-pressure switch is defective.
Condenser fan motor is in abnormal stop.
Printed-circuit board malfunction.
Low-pressure transducer (LPT) value is abnormal.
High-pressure switch lead wire is broken.
High-pressure transducer lead wire is broken.
Set point temperature is not set.
Failure of SRAM (on CPU board)
Short circuit or breakage of both sensor lead wires
Wrong wiring connection on both sensors
CPU board malfunction
Suction modulating valve coil is broken.
The voltage selector is in poor contact.
The circuit breaker is in poor contact.
Power plug is in poor contact.
Power cable is broken
Open phase of power supply
Refer to the possible cause of the left mentioned malfunction codes.
Refrigerant is overcharged
Wrong refrigerant is charged. (i.e. HCFC22)
Air entered in the refrigerant system
Insufficient air flow rate
Ambient temperature is abnormally high
Condenser fan motor running
is abnormal
Water-cooled condenser
capacity is decreased
HPS malfunction
Wiring lead breakage
Poor connection with terminal block board
Wrong wiring of high pressure switch
CPU board malfunction
Power I/O board malfunction
Power I/O board malfunction
PT/CT board malfunction
6-4
Possible cause
CPU board is faulty.
The low-pressure transducer is faulty.
Fins are blocked
Air passage is blocked by some foreign materials
Short circuit of condenser cooling air
Wrong installation of condenser fan
Condenser fan rotates reverse.
Condenser fan breakage.
Condenser fan fell out.
Motor stops due to Blocked finned coil.
thermal protector Air passage is blocked by some foreign materials
actuation. Wiring lead breakage
Motor does not run Wrong wiring
Shortage of cooling-water
Cooling-water temperature high.
Blocked with scale