11 Maintenance And Service; Overview: Maintenance And Service; Maintenance Safety Precautions; Checklist For Yearly Maintenance Of The Indoor Unit - Daikin EGSQH10S18AA9W Installer's Reference Manual

11 Maintenance and service

11 Maintenance and service
NOTICE
Maintenance must be done by an authorised installer or
service agent.
We recommend to do maintenance at least once a year.
However, applicable legislation might require shorter
maintenance intervals.
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO -equivalent) is used to determine the maintenance
2
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
11.1 Overview: Maintenance and
service
This chapter contains information about:
▪ 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 indoor unit
Check the following at least once a year:
▪ Fluid pressure of space heating and brine circuit
▪ Filters
▪ Pressure relief valves (1 at brine side, 1 at space heating side)
▪ Relief valve hoses
▪ Pressure relief valve of the domestic hot water tank
▪ Switch box
▪ Descaling
▪ Chemical disinfection
▪ Anode
▪ Brine leakage
Fluid pressure
Check whether the fluid pressure is above 1 bar. If it is lower, add
fluid.
Filters
Clean the filters.
NOTICE
Handle the space heating circuit filter with care. Do NOT
use excessive force when you reinsert the water filter so as
NOT to damage the water filter mesh.
Installer reference guide
60
NOTICE
When removing the filter circlip, do NOT drop it.
1 3
2
4
5
Pressure relief valve
Open the valve and check the correct operation. Discharge may be
very hot!
Checkpoints are:
▪ Fluid flow coming from the relief valve is high enough, no
blockage of the valve or in between piping is suspected.
▪ Fluid coming out from the relief valve and contains debris or dirt:
▪ open the valve until the discharged water does NOT contain dirt
anymore
▪ flush the system and install an additional water filter (a
magnetic cyclone filter is preferably).
It is recommended to do this maintenance more frequently.
Pressure relief valve hose
Check whether the pressure relief valve hose is positioned
appropriately to drain. See "7.5.5 To connect the pressure relief
valve to the drain" on page 27
relief valve to the drain on the brine side" on
Relief valve of the domestic hot water tank (field supply)
Open the valve and check the correct operation. 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.
▪ Dirty water coming out of the relief valve:
▪ open the valve until the discharged water does not contain dirt
anymore
▪ flush and clean the complete tank, including the piping between
the relief valve and cold water inlet.
To make sure this water originates from the tank, check after a tank
heat up cycle.
It is recommended to do this maintenance more frequently.
Switch box
▪ Carry out a thorough visual inspection of the switch box and look
for obvious defects such as loose connections or defective wiring.
▪ Using an ohmmeter, check if contactors K1M, K2M, K3M and K5M
(depending on your installation) operate correctly. All contacts of
these contactors must be in open position when the power is
turned OFF.
WARNING
If the internal wiring is damaged, it has to be replaced by
the manufacturer, its service agent or similarly qualified
persons.
and "7.4.5 To connect the pressure
page 26.
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02