14 | Troubleshooting
Installer reference guide
261
ERGA04~08E + EHVH04+08SU18+23E
Daikin Altherma 3 R F
4P629090-1C – 2022.08
Error code Description
H1-00 External temperature sensor problem
H3-00 OU: Malfunction of high pressure switch (HPS)
H5-00 Malfunction of compressor overload protection
H6-00 OU: Malfunction of position detection sensor
H8-00 OU: Malfunction of compressor input (CT)
system
H9-00 OU: Malfunction of outdoor air thermistor
HC-00 Tank temperature sensor problem
HC-01 Second tank temperature sensor problem
HJ-10 Water pressure sensor abnormality
J3-00 OU: Malfunction of discharge pipe thermistor
J6-00 OU: Malfunction of heat exchanger thermistor
J6-07 OU: Malfunction of heat exchanger thermistor
JA-00 OU: Malfunction of high pressure sensor
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
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