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Troubleshooting
Installer reference guide
261
EPRA14~W1 + ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH₂O
4P679467-1 – 2022.02
Error code
Description
HC-01
Second tank temperature sensor problem
HC-09
Tank temperature sensor problem
HJ-10
Water pressure sensor abnormality
J3-00
OU: Malfunction of discharge pipe thermistor
J3-10
Compressor port thermistor abnormality
J5-00
Malfunction of suction pipe thermistor
J6-00
OU: Malfunction of heat exchanger thermistor
J6-07
OU: Malfunction of heat exchanger thermistor
J6-32
Leaving water temperature thermistor
Abnormality (outdoor unit)
J6-33
Sensor communication error
J8-00
Malfunction of refrigerant liquid thermistor
JA-00
OU: Malfunction of high pressure sensor
JC-00
Low pressure sensor abnormality
JC-01
Evaporator pressure 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