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12 Troubleshooting
Installer reference guide
80
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
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
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.
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
Detailed error
code
Description
7H
01
Water flow problem
7H
04
Water flow problem during
domestic hot water production
Error code
Detailed error
code
Description
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
81
01
Mixed water thermistor
abnormality.
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
01
Overheating mixed water circuit
8H
02
Overheating mixed water circuit
(thermostat)
8H
03
Overheating water circuit
(thermostat)
AA
01
Backup heater overheated
AA
02
External backup heater
overheated
AH
00
Tank disinfection function not
completed correctly
AJ
03
Too long DHW heat-up time
required
C0
00
Water flow detected while pump
is OFF
C0
01
Flow switch malfunction
C0
02
Flow switch malfunction
C4
00
Heat exchanger temperature
sensor problem
CJ
02
Room temperature sensor
problem
EC
00
Abnormal increase tank
temperature
EC
04
Tank preheating
H1
00
External temperature sensor
problem
HC
00
Tank temperature sensor
problem
HC
01
Second tank temperature sensor
problem
HJ
10
Water pressure sensor
abnormality
JA
17
Refrigerant pressure sensor
abnormality
U3
00
Under floor heating screed dryout
function not completed correctly
U4
00
Indoor/outdoor unit
communication problem
U5
00
User interface communication
problem
U8
01
Connection with LAN adapter lost
Содержание Altherma EHVZ04S18DA6V
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