To Drain The Domestic Hot Water Tank; 12 Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting - Daikin EGSQH10S18AA9W Installer's Reference Manual

Descaling
Depending on water quality and set temperature, scale can deposit
on the heat exchanger inside the domestic hot water tank and can
restrict heat transfer. For this reason, descaling of the heat
exchanger may be required at certain intervals.
Chemical disinfection
If the applicable legislation requires a chemical disinfection in
specific situations, involving the domestic hot water tank, please be
aware that the domestic hot water tank is a stainless steel cylinder
containing an aluminium anode. We recommend to use a non-
chloride based disinfectant approved for use with water intended for
human consumption.
NOTICE
When using means for descaling or chemical disinfection,
it must be ensured that the water quality remains compliant
with EU directive 98/83 EC.
Anode
No maintenance or replacement required.
Brine leakage
Carefully check if brine leakage is noticeable around the inside of the
unit.
Open the sound insulation jacket and check if brine leakage is
noticeable inside this enclosed volume.
11.4 To drain the domestic hot water
tank
Prerequisite: Switch OFF the power supply.
Prerequisite: Turn OFF the cold water supply.
1 Open the front panel.
2 The drain hose is located at the right side of the unit. Cut the tie
wraps or tape and bring the flexible drain hose forward.
EGSQH10S18AA9W
Daikin Altherma ground source heat pump
4P351748-1D – 2016.02
2×
INFORMATION
To drain the tank, all the hot water tapping points need to
be opened to allow air to enter the system.
3 Open the drain valve.
12 Troubleshooting
12.1

Overview: Troubleshooting

This chapter describes what you have to do in case of problems.
It contains information about:
▪ Solving problems based on symptoms
▪ Solving problems based on error codes
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
12.2

Precautions when troubleshooting

WARNING
▪ When carrying out an inspection on the switch box of
the unit, always make sure that the unit is disconnected
from the mains. Turn off the respective circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER bridge safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION

12 Troubleshooting

Installer reference guide
61