11 Maintenance and service
Installer reference guide
74
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
▪ The yearly maintenance of the indoor unit
11.2
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
11.3
Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
▪ Outdoor unit heat exchanger.
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
11.4
Checklist for yearly maintenance
of the indoor unit
Check the following at least once a year:
▪ Water pressure
▪ Water filters
▪ Magnetic filter/dirt separator
▪ Water pressure relief valve
▪ Relief valve hose
▪ Pressure relief valve of the domestic hot water tank
▪ Switch box
▪ Descaling
▪ Chemical disinfection
Water pressure
Check whether the water pressure is above 1 bar. If it is lower, add
water.
Water filters
Clean the water filters.
NOTICE
Handle the water filters with care. Do NOT use excessive
force when you reinsert the water filters so as NOT to
damage the water filters mesh.
1
3
2
5
4
Magnetic filter/dirt separator
b
a
c
d
a
Screw connection
b
Magnetic sleeve
c
Drain valve
d
Drain cap
The yearly maintenance of the magnetic filter/dirt separator consists
of:
▪ Checking if both parts of the magnetic filter/dirt separator are still
screwed tight (a).
▪ Emptying the dirt separator as follows:
1
Take off the magnetic sleeve (b).
2
Unscrew the drain cap (d).
3
Connect a drain hose to the bottom of the water filter so that the
water and dirt can be collected in a suitable container (bottle,
sink...).
4
Open the drain valve for a couple of seconds (c).
Result:
Water and dirt will come out.
5
Close the drain valve.
6
Screw the drain cap back on.
7
Reattach the magnetic sleeve.
8
Check the pressure of the water circuit. If required, add water.
NOTICE
▪ When checking the magnetic filter/dirt separator for
tightness, hold it firmly, so as NOT to apply stress to
the water piping.
▪ Do NOT isolate the magnetic filter/dirt separator by
closing the shut‑off valves. To properly empty the dirt
separator, sufficient pressure is required.
▪ To prevent dirt from remaining in the dirt separator,
ALWAYS take off the magnetic sleeve.
▪ ALWAYS first unscrew the drain cap, and connect a
drain hose to the bottom of the water filter, then open
the drain valve.
INFORMATION
For yearly maintenance, you do not have to remove the
water filter from the unit to clean it. But in case of trouble
with the water filter, you might have to remove it so that
you can thoroughly clean it. Then you need to do as
follows:
▪
"11.5.1 To remove the water filter" on page 75
▪
"11.5.2 To clean the water filter in case of trouble" on
page 76
▪
"11.5.3 To install the water filter" on page 76
Water pressure relief valve
Open the valve and check if it operates correctly.
The water may be
very hot!
Checkpoints are:
▪ The water flow coming from the relief valve is high enough, no
blockage of the valve or in between piping is suspected.
