Hand-Over To The User 74; Maintenance And Service; Overview: Maintenance And Service; Maintenance Safety Precautions - Daikin CHYHBH05AA Installer's Reference Manual

11 Hand-over to the user
Make sure that the leaving water temperature home page, room
temperature home page, and domestic hot water home page are
turned OFF.
There may be no error on the gas boiler or the heat pump module.
During a gas boiler test run, "busy" will be displayed on the user
interface.
Program Button combination
Burner ON at
minimum power
Burner ON, maximum and
space heating power
setting
Burner ON, maximum and
domestic hot water
setting
Stop test program
NOTICE
If an 81‑04 error occurs, then do NOT perform a test run
on the gas boiler.
NOTICE
During the maintenance of the boiler, the direct expansion
indoor unit is NOT allowed to operate.
11 Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Fill in the installer setting table (in the operation manual) with the
actual settings.
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation on the url as earlier described in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do in relation to maintaining the unit.
▪ Explain the user about energy saving tips as described in the
operation manual.
12

Maintenance and service

NOTICE
Maintenance MUST be done by an authorized installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
12.1 Overview: Maintenance and
service
This chapter contains information about:
▪ The yearly maintenance of the indoor unit
▪ Cleaning the gas boiler
12.2

Maintenance safety precautions

DANGER: RISK OF ELECTROCUTION
Installer reference guide
74
Display
and
(1×)
(2×)
and Actual situation
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.
12.2.1

Opening the indoor unit

See "7.2.2 To open the switch box cover of the indoor unit" on
page 22.
12.3 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.
12.4 Checklist for yearly maintenance
of the indoor unit
Check the following at least once a year:
▪ Water pressure
▪ Water filter
▪ Water pressure relief valve
▪ Pressure relief valve of the domestic hot water tank
▪ Switch box
Water pressure
Check whether the water pressure is above 1 bar. If it is lower, add
water.
Water filter
Clean the water filter.
NOTICE
Handle the water filter with care. Do NOT use excessive
force when you reinsert the water filter so as NOT to
damage the water filter mesh.
1 3
2
4
5
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.
Daikin hybrid for multi heat pump – heat pump module
CHYHBH05+08AA + EHYKOMB33A
4P471761-1A – 2017.10