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Troubleshooting
Installer reference guide
183
EPGA11~16DAV3(7) + EA23DA6V(7)+9W
Daikin Altherma 3 H F
4P556075-1A – 2021.09
Error code
Detailed error code Description
JA
00
OU: Malfunction of high
pressure sensor
JA
17
Refrigerant pressure sensor
abnormality
L1
00
Malfunction of INV PCB
L3
00
OU: Electrical box
temperature rise problem
L4
00
OU: Malfunction of inverter
radiating fin temperature
rise
L5
00
OU: Inverter instantaneous
overcurrent (DC)
L8
00
Malfunction triggered by a
thermal protection in the
inverter PCB
L9
00
Prevention of compressor lock
LC
00
Malfunction in communication
system of outdoor unit
P1
00
Open-phase power supply
imbalance
P3
00
Abnormal direct current
P4
00
OU: Malfunction of radiating
fin temperature sensor
PJ
00
Capacity setting mismatch
U0
00
OU: Shortage of refrigerant
U1
00
Malfunction by reverse phase/
open-phase
U2
00
OU: Defect of power supply
voltage
U3
00
Underfloor heating screed
dryout function not completed
correctly
U4
00
Indoor/outdoor unit
communication problem
U5
00
User interface communication
problem
U7
00
OU: Transmission malfunction
between main CPU- INV CPU
U8
01
Connection with LAN adapter
lost
U8
02
Connection with room
thermostat lost
U8
03
No connection with room
thermostat
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