To Perform A Gas Pressure Test; To Perform A Test Run On The Gas Boiler; 10 Maintenance And Service; Maintenance Safety Precautions - Daikin Altherma EHY2KOMB28AA Installation And Operation Manual

9.1

To perform a gas pressure test

1 Connect a suitable gauge on the gas valve. Static pressure
MUST be 20 mbar.
2 Select test program " ". See
gas boiler" on page 31. Static pressure MUST be 20 mbar (+
or – 1 mbar). If the working pressure is <19 mbar, the gas boiler
output will be reduced and the correct combustion reading may
NOT be obtained. Do NOT adjust the air and/or gas ratio. To
obtain sufficient working pressure, gas supply MUST be correct.
INFORMATION
Make sure the working inlet pressure does NOT interfere
with other gas appliances installed.
9.2 To perform a test run on the gas
boiler
The gas boiler has a test run function. Activating this function results
in the activation of the gas boiler (pump starts and fan starts with a
fixed speed), without the control functions being actuated. The safety
functions remain active. The test run can be stopped by pressing
and simultaneously or will end automatically after 10 minutes. To
perform a test run, switch off the system with the user interface.
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.
EHY2KOMB28+32AA
Daikin Altherma hybrid monobloc – Gas boiler module
4P538953-1 – 2018.06
"9.2 To perform a test run on the
Display
and
(1×)
(2×)
and Actual situation

10 Maintenance and service

10 Maintenance and service
Especially for UK:
After servicing, complete the relevant Service Interval Record
section of the Benchmark Checklist located on the backpages of this
document.
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.
10.1

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.
10.1.1

Opening the gas boiler

See "6.1.1 To open the gas boiler" on
10.2

To disassemble the gas boiler

1 Turn off the appliance.
2 Turn off the main power supply of the appliance.
3 Close the gas tap.
4 Remove the front panel.
5 Wait until the appliance has cooled down.
6 Unscrew the coupling nut at the base of the flue pipe by turning
counterclockwise.
7 Slide the flue pipe upwards by turning it clockwise until the
bottom of the pipe is above the condensate drain pan
connection.
page 11.
Installation and operation manual
31