12 Troubleshooting
Installer reference guide
86
ERGA04~08DAV3(A) + EHVH04+08S23DAV
Daikin Altherma – Low temperature split
4P499573-1 – 2017.12
Error code Detailed error
code
Description
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
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
INFORMATION
In case of error code AH and no interruption of the
disinfection function occurred due to domestic hot water
tapping, following actions are recommended:
▪ When the Domestic hot water > Type > Reheat or
Reheat + sched. is selected, it is recommended to
program the start-up of the disinfection function at least
4 hours later than the last expected large hot water
tapping. This start-up can be set by installer settings
(disinfection function).
▪ When the Domestic hot water > Type > Scheduled only
is selected, it is recommended to program a Storage
eco 3 hours before the scheduled start-up of the
disinfection function to preheat the tank.
INFORMATION
If the anti-legionella heater overheats and is disabled by
the thermostatic safety, the unit will not give an error
directly. Check if the anti-legionella heater is still in
operation if you experience one or more of the following
errors:
▪ Powerful operation takes a very long time to heat up
and the error code AJ-03 is displayed.
▪ During anti-legionella operation (weekly), the error code
AH-00 is displayed because the unit cannot reach the
requested temperature required for tank disinfection.
INFORMATION
A malfunctioning anti-legionella heater will have an impact
on energy metering and power consumption control.
NOTICE
When the minimum water flow is lower than described in
the table below, the unit will temporarily stop operation and
the user interface will display error 7H‑01. After some time,
this error will reset automatically and the unit will resume
operation.
INFORMATION
Error AJ-03 is reset automatically from the moment there is
a normal tank heat-up.
INFORMATION
How an error code can be reset will be displayed on the
user interface connected on the indoor unit.
Error code UA 17: Tank type problem
Possible cause Corrective action
No backup heater is installed,
and [E-05] is set to "0".
Set [E-05] to "1".
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
Final English - Tanslations in progress
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