15 Troubleshooting
Installer reference guide
91
EJHA NHY32AA
Daikin Altherma H Hybrid
4P556861-1A – 2019.05
Error code
Detailed error
code
Description
F3
00
OU: Malfunction of
discharge
pipe temperature.
Please contact your dealer.
F6
00
OU: Abnormal high pressure
in cooling.
Please contact your dealer.
FA
00
OU: Abnormal high
pressure,
actuation of HPS.
Please contact your dealer.
JA
00
OU: Malfunction of high
pressure sensor.
Please contact your dealer.
J3
00
OU: Malfunction of
discharge
pipe thermistor.
Please contact your dealer.
J6
00
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
J6
07
OU: Malfunction of heat
exchanger thermistor.
Please contact your dealer.
L3
00
OU: Electrical box
temperature
rise problem.
Please contact your dealer.
L4
00
OU: Malfunction of
inverter
radiating fin temperature
rise.
Please contact your dealer.
L5
00
OU: Inverter instantaneous
overcurrent (DC).
Please contact your dealer.
P4
00
OU: Malfunction of
radiating
fin temperature sensor.
Please contact your dealer.
U0
00
OU: Shortage of
refrigerant.
Please contact your dealer.
U2
00
OU: Defect of power supply
voltage.
Please contact your dealer.
U7
00
OU: Transmission
malfunction
between main CPU- INV CPU.
Please contact your dealer.
Hydro part
Error code
Detailed error
code
Description
80
00
Returning water
temperature
sensor problem.
Please contact your dealer.
81
00
Leaving water temperature
sensor problem.
Please contact your dealer.
89
01
Heat exchanger frozen.
89
02
Heat exchanger frozen.
89
03
Heat exchanger frozen.
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.
Power reset required.
Please contact your dealer.
A1
00
EEPROM reading error.
AA
01
Backup heater overheated.
Power reset required.
Please contact your dealer.
AC
00
Booster heater overheated.
Please contact your dealer.
AH
00
Tank disinfection function
not
completed correctly.
AJ
03
Too long DHW heat-up time
required.
C4
00
Heat exchanger temperature
sensor problem.
Please contact your dealer.