12 Troubleshooting
Installer reference guide
79
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
Possible causes
Corrective action
Too much heat pump capacity is
used for heating domestic hot
water
Check and make sure that the
"space heating priority" settings
have been configured
appropriately:
▪ Make sure that the "space
heating priority status" has
been enabled. Go to [9.6.1]:
Installer settings > Balancing >
Space heating priority [5‑02]
▪ Increase the "space heating
priority
temperature"
to
activate
backup
heater
operation at a higher outdoor
temperature. Go to [9.6.3]:
Installer settings > Balancing >
Offset BSH setpoint [5‑03]
12.3.7
Symptom: The pressure at the tapping
point is temporarily unusually high
Possible causes
Corrective action
Failing or blocked pressure relief
valve.
▪ Flush and clean the complete
tank
including
the
piping
between pressure relief valve
and the cold water inlet.
▪ Replace the pressure relief
valve.
12.3.8
Symptom: Decoration panels are pushed
away due to a swollen tank
Possible causes
Corrective action
Failing or blocked pressure relief
valve.
Contact your local dealer.
12.3.9
Symptom: Tank disinfection function is
NOT completed correctly (AH-error)
Possible causes
Corrective action
The disinfection function was
interrupted by domestic hot water
tapping
Program the start-up of the
disinfection function when the
coming 4 hours NO domestic hot
water tapping is expected.
Large domestic hot water tapping
happened recently before the
programmed start-up of the
disinfection function
When Tank > Heat up mode >
Reheat only or Sc
reheat is selected, it is
recommended to program the
start-up 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 Tank > Heat up mode >
Schedule only is selected, it is
recommended to program a Eco
action 3 hours before the
scheduled start-up of the
disinfection function to preheat
the tank.
The disinfection operation was
stopped manually: [C.3]
Operation > Tank was turned off
during disinfection.
Do NOT stop tank operation
during disinfection.
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 the 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
