11 Maintenance and service
Installation and operation manual
32
EHYKOMB33A
Daikin Altherma hybrid heat pump – gas boiler module
4P353067-1K – 2020.10
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.
10.2
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 indoor unit pump, as well as the gas boiler
(with a fixed fan 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
Display
Burner ON at
minimum power
and
Burner ON, maximum
space heating power
setting
and (1×)
Burner ON, maximum
domestic hot water
setting
and (2×)
Stop test program
and
Actual situation
NOTICE
If an 81‑04 error occurs, then do NOT perform a test run
on the gas boiler.
11
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.
11.1
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
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.
11.1.1
Opening the gas boiler
"7.1.1 To open the gas boiler"
11.2
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.
