Daikin Altherma 3 GEO Series Installer's Reference Manual page 96

14 Troubleshooting
Error code
7H-04 Water flow problem during domestic hot
water production
Water flow problem during heating/
7H-05
sampling
7H-06 Water flow problem during cooling/
defrost
7H-07 Water flow problem. Pump deblocking
active
Returning water temperature sensor
80-00
problem
81-00 Leaving water temperature sensor problem
81-04 Leaving water temperature sensor not
properly mounted
89-01 Heat exchanger frozen
Heat exchanger frozen
89-02
Heat exchanger frozen
89-03
8F-00 Abnormal increase outlet water
temperature (DHW)
8H-00 Abnormal increase outlet water
temperature
8H-03 Overheating water circuit (thermostat)
A1-00 Zero cross detection problem
OU: High pressure peak cut / freeze
A5-00
protection problem
AA-01 Backup heater overheated
AH-00 Tank disinfection function not completed
correctly
AJ-03 Too long DHW heat-up time required
C0-00 Flow sensor malfunction
ACS communication malfunction
C1-10
ACS communication malfunction
C1-11
C4-00 Heat exchanger temperature sensor
problem
C5-00 Heat exchanger thermistor abnormality
C8-01 Current sensor abnormality
CJ-02 Room temperature sensor problem
E1-00 OU: PCB defect
E3-00 OU: Actuation of high pressure switch
(HPS)
E4-00 Abnormal suction pressure
E5-00 OU: Overheat of inverter compressor
motor
E6-00 OU: Compressor startup defect
E7-63 Brine pump error
E8-00 OU: Power input overvoltage
E9-00 Malfunction of electronic expansion
valve
EA-00 OU: Cool/heat switchover problem
EC-00 Abnormal increase tank temperature
EC-04 Tank preheating
EJ-01 Brine circuit pressure low
F3-00 OU: Malfunction of discharge pipe
temperature
OU: Abnormal high pressure in cooling
F6-00
OU: Abnormal high pressure, actuation of
FA-00
HPS
H0-00 OU: Voltage/current sensor problem
Installer reference guide
96
Description Error code
H1-00 External temperature sensor problem
H3-00 OU: Malfunction of high pressure switch
(HPS)
H4-00 Malfunction of low pressure switch
H5-00 Malfunction of compressor overload
protection
H6-00 OU: Malfunction of position detection
sensor
OU: Malfunction of compressor input (CT)
H8-00
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
HJ-12 Bypass valve turning error
OU: Malfunction of discharge pipe
J3-00
thermistor
J5-00 Malfunction of suction pipe thermistor
J6-00 OU: Malfunction of heat exchanger
thermistor
J6-07 OU: Malfunction of heat exchanger
thermistor
Leaving water temperature thermistor
J6-32
Abnormality (outdoor unit)
J6-33 Sensor communication error
J7-12 Brine inlet thermistor abnormality
J8-00 Malfunction of refrigerant liquid
thermistor
Brine outlet thermistor abnormality
J8-07
OU: Malfunction of high pressure sensor
JA-00
JA-17 Refrigerant pressure sensor abnormality
JC-00 Low pressure sensor abnormality
JC-01 Evaporator pressure sensor (S1NPL) 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
Open-phase power supply imbalance
P1-00
P3-00 Abnormal direct current
P4-00 OU: Malfunction of radiating fin
temperature sensor
PJ-00 Capacity setting mismatch
PJ-09 Brine pump type 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
Description
EGSAH/X06+10DA9W(G)
Daikin Altherma 3 GEO
4P569820-1A – 2019.09