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Daikin Error Codes – Outdoor Unit

Daikin Error Codes – Outdoor Unit

Simple Self-Diagnosis by Malfunction Code For Daikin Outdoor Unit

For error codes beginning with E, F, H, J, L, M or P, stay on this page and scroll down

For error codes beginning with 6, 7, 8 or 9, find causes here

For error codes beginning with A or C, find causes here

For error codes beginning with U, find causes here

Glow Still Cant Work It Out 4

 

Outdoor Unit Error Codes and ContentsSupposed causesParts affected
E0
Protection devices activated (unified)
Protection device connected to outdoor unit PCB actuated
Defective protection device connector contact
SkyAir, VRV, Chiller
E1
Defective outdoor unit PCB
Defective outdoor unit PCB
Defective connection of inside/ outside relay wires
RA, SkyAir, VRV, Package, Chiller
E3
Actuation of high pressure switch
(HPS)
Dirty outdoor unit heat exchanger
Defective high pressure switch
Clogged refrigerant piping
Defective connector contact
RA, SkyAir, VRV, Package
E4
Actuation of low pressure switch
(LPS)
Abnormally drop in low pressure
Defective low pressure sensor
Defective outdoor unit PCB
Defective connector contact
SkyAir, VRV, Package, Chiller
E5
Inverter compressor motor or
overheat
Inverter compressor lock
High differential pressure
Defective inverter PCB
UVW connection error
Defective connector contact
RA, SkyAir, VRV, Package, Chiller
E6
STD compressor motor
overcurrent/lock
Defective compressor
Defective control PCB
The stop valve is not opened
RA, SkyAir, VRV, Package
E7
Malfunction of outdoor unit fan
motor system
Fan motor failure
Neglect to connect or defective connection of harness/
connector between the fan motor and the PCB
Fan does not rotate due to foreign matters caught in it
RA, SkyAir, VRV, Package, Chiller
E8
Overcurrent of inverter compressor
Defective compressor
Defective inverter main circuit capacitor
Defect of outdoor unit PCB
Defect of power transistor
RA, Chiller
E9
Malfunction of electronic expansion
valve coil
Disconnection of connectors from electronic expansion valves
Defective electronic expansion valve coil
Defective outdoor unit control PCB
SkyAir, VRV, Package, Chiller
EA
Malfunction of four way valve or
cool/heat switch
Defective four way valve
Shortage of gas
Defective outdoor unit PCB
Defective thermistor
RA
EC
Malfunction of entering water
temperature
Cooling water temperature abnormality
Defective outdoor unit PCB
Defective thermistor
VRV
F3
Malfunction of discharge pipe
temperature
Defective discharge pipe thermistor
Abnormal discharge pipe temperature
Defective outdoor unit control PCB
Defective connector contact
RA, SkyAir, VRV, Package, Chiller
F6
Abnormal high pressure or
refrigerant overcharged
Refrigerant overcharged
Disconnection of heat exchanger deicer thermistor
Disconnection of outdoor air thermistor
Disconnection of liquid pipe temperature thermistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package
H0
Malfunction of sensor system of
compressor
Harness is disconnected, or defective connection
Defective PCB
RA, Chiller
H1
Malfunction of room temperature
sensor or humidifier unit damper
Defective limit switch
Defective damper
RA, Chiller
H3
Malfunction of high pressure switch
(HPS)
Defective high pressure switch
Broken wire
Defective outdoor unit PCB
Defective connector contact
RA, SkyAir, VRV, Package, Chiller
H4
Malfunction of low pressure switch
(LPS)
Defective low pressure switch
Broken wire
Defective outdoor unit PCB
Defective connector contact
SkyAir, VRV, Chiller
H5
Malfunction of compressor motor
overload thermistor
Defect of compressor motor overload thermistor
Defective connector contact
RA, Chiller
H6
Malfunction of position detection
sensor
Faulty contact of compress or cable
Defective compressor
Defective outdoor unit PCB
RA, Package, Chiller
H7
Malfunction of outdoor unit fan
motor signal
Abnormal signal from fan motor (Circuit failure)
Disconnection/Short circuit in fan motor leads or
disconnection of connector
Defective inverter PCB
SkyAir, VRV, Package, Chiller
H8
Malfunction of compressor input
(CT) system
Defective power transistor
Defective reactor
Faulty wiring of inverter system
Defective outdoor unit PCB
RA, Chiller
H9
Malfunction of outdoor air
thermistor
Defective connection of thermistor
Defective outdoor unit PCB
Defective outdoor air thermistor
RA, SkyAir, VRV, Package, Chiller
HC
Malfunction of (hot) water
temperature thermistor
Defective connection of thermistor
Defective outdoor unit PCB
Defective water temperature thermistor
SkyAir, VRV, Chiller
HF
Alarm in thermal storage unit or
storage controller
Thermal storage group defective wiring
Defective setting
Excess of thermal storage tank numbers
VRV
HJ
Malfunction of thermal storage
tank water level
Low water level
Defective switch setting
Water level detecting sensor failure
Defective connector contact
RA, SkyAir, VRV, Package
J1
Malfunction of pressure sensor
Defective pressure sensor connector contact
Defective pressure sensor
Defective outdoor unit PCB
SkyAir, VRV, Package, Chiller
J2
Malfunction of current sensor of
compressor
Defective current sensor
Defective compressor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package, Chiller
J3
Malfunction of discharge pipe
thermistor
Defective connection of thermistor
Defective discharge pipe thermistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package, Chiller
J4
Malfunction of low pressure
equivalent saturated temperature
sensor system
Defective connection of thermistor
Defective thermistor
Defective outdoor unit PCB
VRV, Chiller
J5
Malfunction of suction pipe
thermistor
Defective connection of thermistor
Defective suction pipe thermistor
Defective outdoor unit PCB
SkyAir, VRV, Package, Chiller
J6
Malfunction of heat exchanger
thermistor
Defective connection of thermistor
Defective heat exchanger thermistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package, Chiller
J7
Malfunction of thermistor
(Refrigerant circuit)
Defective connection of thermistor
Defective liquid pipe thermistor
Defective outdoor unit PCB
SkyAir, VRV, Package, Chiller
J8
Malfunction of thermistor
(Refrigerant circuit)
Defective connection of thermistor
Defective liquid pipe thermistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package, Chiller
J9
Malfunction of thermistor
(Refrigerant circuit)
Defective connection of thermistor
Defective gas pipe thermistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Package, Chiller
JA
Malfunction of high pressure
sensor
Defective connector contact
Connection of low pressure sensor in mistake for high
pressure sensor
Defective high pressure sensor
Defective outdoor unit PCB
SkyAir, VRV, Package, Chiller
JC
Malfunction of low pressure sensor
Defective connector contact
Connection of high pressure sensor in mistake for low
pressure sensor
Defective low pressure sensor
Defective outdoor unit PCB
SkyAir, VRV, Package, Chiller
JE
Malfunction of oil pressure sensor
or sub-tank thermistor
Defective connector contact
Defective sub-tank thermistor
Defective outdoor unit PCB
VRV
JF
Malfunction of oil level sensor or
heating heat exchanger thermistor
Defective connector contact
Defective heat exchanger thermistor
Defective outdoor unit PCB
VRV
L0
Malfunction of inverter system
Shortage of power supply capacity
Defective power transistor
Defective outdoor unit PCB
VRV, Chiller
L1
Malfunction of inverter PCB
Defective compressor wiring
Defective outdoor unit fan motor
Blown fuse
Defective inverter PCB
SkyAir, VRV, Package, Chiller
L3
El.compo. box temperature rise
Fin temperature rise due to short circuit
Defective outdoor unit fan motor
Defective power transistor
Defective outdoor unit PCB
RA, SkyAir, VRV, Chiller
L4
Malfunction of inverter radiation fi n
temperature rise
Fin temperature rise due to short circuit
Defective fi n thermistor
RA, SkyAir, VRV, Package, Chiller
L5
Inverter instantaneous overcurrent
(DC output)
Defective compressor coil (such as wiring disconnection or
insulation failure)
Compressor startup failure (mechanical lock)
Defective inverter PCB
RA, SkyAir, VRV, Package, Chiller
L6
Inverter instantaneous overcurrent
(AC output)
Overcharge of refrigerant amount
Shortage of power supply capacity
Defective compressor
Defective inverter unit
VRV, Chiller
L8
Malfunction of overcurrent inverter
compressor
Compressor overloaded
Wiring disconnection in compressor coil
Disconnection of compressor wiring
Defective inverter PCB
RA, SkyAir, VRV, Package, Chiller
L9
Malfunction of inverter compressor
startup error (Stall prevention)
The stop valve is not opened
Defective compressor
Error in wire connections to compressor
Large differential pressure before compressor startup
Defective inverter PCB
SkyAir, VRV, Package, Chiller
LA
Malfunction of power transistor
Defective power transistor
Defective compressor
Defective inverter PCB
VRV, Chiller
LC
Malfunction of transmission
between control and inverter PCB
Defective connection between the inverter PCB and the
control PCB
External factors (e.g. noise)
Defective inverter compressor
Defective control PCB (transmission block)
RA, SkyAir, VRV, Package, Chiller
M1
Malfunction of central remote
controller PCB
Defective central remote controller PCBRA, SkyAir, VRV, Package, Fan Coil
M8
Malfunction of transmission
between optional controllers for
centralized control
Other centralized control power disconnection
Centralized control reset switch ON
Defective transmission wiring
Central remote controller address change
RA, SkyAir, VRV, Package, Fan Coil
MA
Improper combination of optional
controllers for centralized control
Improper combination of optional controllers for centralized
control
More than one master controller is connected
Faulty setting of centralized control
Defect of centralized control
RA, SkyAir, VRV, Package, Fan Coil
MC
IAddress duplication, improper
setting
Address duplication of central remote controllerRA, SkyAir, VRV, Package, Fan Coil
PO
Shortage of refrigerant amount
(thermal storage unit)
Shortage of refrigerant
Clogged refrigerant piping
VRV, Chiller
P1
Power voltage imbalance or
inverter PCB
Open phase
Interphase voltage imbalance
Defective capacitor in the main circuit
Defective wiring in the main circuit
Defective inverter PCB
SkyAir, VRV, Package, Chiller
P2
Automatic refrigerant charge
operation stop
The stop valve is not opened
Closed valve of refrigerant tank
SkyAir, VRV, Package, Chiller
P3
Malfunction of thermistor in switch
box
Defective connection of thermistor
Defective reactor thermistor
Defective inverter PCB
RA, SkyAir, VRV, Package, Chiller
P4
Malfunction of radiation fin
temperature sensor
Defective radiation fi n temperature thermistor
Defective inverter PCB
Defective INV. compressor
Defective fan motor
RA, SkyAir, VRV, Package, Chiller
P8
Heat exchanger freezing protection
during automatic refrigerant
charging
(Close the refrigerant cylinder. Start again from step 1.)SkyAir, VRV, Package
P9
Malfunction of fan motor
(humidifier unit)
Defective fan motor
Defective outdoor unit PCB
Broken relay harness
Defective connector contact
RA
P9
Automatic refrigerant charge
operation completed
__SkyAir, VRV, Package, Heat reclaim ventilator
PA
Refrigerant cylinder during
automatic refrigerant charging
Refrigerant cylinder of master unit is emptySkyAir, VRV, Package
PA
Broken wire of heater
(humidifier unit)
Defective heater unit
Defective thermistor
Defective outdoor unit PCB
RA
PC
Refrigerant cylinder during
automatic refrigerant charging
Refrigerant cylinder of slave unit 2 is emptyVRV, Package
PE
Automatic refrigerant charge
operation nearly completed
__SkyAir, VRV, Package
PH
Refrigerant cylinder during
automatic refrigerant charging
Defective heater unit
Defective connector contact
Defective thermistor
Defective outdoor unit PCB
RA, VRV, Package
PJ
Malfunction of capacity setting
(Outdoor unit PCB)
Capacity setting adaptor is not installed
Improper capacity setting adaptor
Defective outdoor unit PCB
SkyAir
PJ
Improper combination between
inverter and fan driver
Mis-matching of type of PCB
Improper (or no) fi eld setting after replacing outdoor unit
main PCB
SkyAir, VRV, Package, Chiller
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