12 Troubleshooting
Installer reference guide
85
ERGA04~08DAV3(A) + EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499573-1A – 2018.11
12.4 Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. It is important to understand the problem and to take
measures before resetting an error code. This should be done by a
licensed installer or by your local dealer.
This chapter gives you an overview of all error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
12.4.1 To display the help text in case of a
malfunction
In case of a malfunction, the following will appear on the home
screen depending on the severity:
▪ : Error
▪ : Malfunction
You can get a short and a long description of the malfunction as
follows:
1 Press the left dial to open the main menu and go to
Malfunctioning.
Result: A short description of the error and the error
code is displayed on the screen.
2 Press in the error screen.
Result: A long description of the error is displayed
on the screen.
12.4.2 Error codes: Overview
Error codes of the outdoor unit
Error code Detailed error
code
Description
A1 00 Zero cross detection problem
A5 00 OU: High pressure peak cut /
freeze protection problem
E1 00 OU: PCB defect
E3 00 OU: Actuation of high pressure
switch (HPS)
E5 00 OU: Overheat of inverter
compressor motor
E6 00 OU: Compressor startup defect
E7 00 OU: Malfunction of outdoor unit
fan motor
E8 00 OU: Power input overvoltage
EA 00 OU: Cool/heat switchover
problem
H0 00 OU: Voltage/current sensor
problem
H3 00 OU: Malfunction of high pressure
switch (HPS)
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
F3 00 OU: Malfunction of discharge
pipe temperature
Error code Detailed error
code
Description
F6 00 OU: Abnormal high pressure in
cooling
FA 00 OU: Abnormal high pressure,
actuation of HPS
JA 00 OU: Malfunction of high pressure
sensor
J3 00 OU: Malfunction of discharge
pipe thermistor
J6 00 OU: Malfunction of heat
exchanger thermistor
J6 07 OU: Malfunction of heat
exchanger thermistor
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)
P4 00 OU: Malfunction of radiating fin
temperature sensor
U0 00 OU: Shortage of refrigerant
U2 00 OU: Defect of power supply
voltage
U7 00 OU: Transmission malfunction
between main CPU- INV CPU
Error codes of the indoor unit
Error code Detailed error
code
Description
7H 01 Water flow problem
7H 04 Water flow problem during
domestic hot water production
7H 05 Water flow problem during
heating/sampling
7H 06 Water flow problem during
cooling/defrost
7H 07 Water flow problem. Pump
deblocking active
80 00 Returning water temperature
sensor problem
81 00 Leaving water temperature
sensor problem
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)
AA 02 External backup heater
overheated
AC 00 Booster heater overheated
AH 00 Tank disinfection function not
completed correctly
AJ 03 Too long DHW heat-up time
required
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