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Third party components
Service manual
287
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
a
b
a
Liquid stop valve
b
Gas stop valve
2
Check if the stop valves are completely open.
The refrigerant circuit stop valves are
open?
Action
Yes
Return to the troubleshooting of the
specific error and continue with the
next procedure.
No
Open the stop valves of the refrigerant
circuit, see
291].
To check if the refrigerant circuit is clogged
1
Turn ON the power of the unit.
2
Activate
Heating
operation via the user interface.
3
Wait for the system to run at a more or less stable condition.
4
On the refrigerant liquid piping (between the refrigerant/water heat
exchanger and the outdoor unit heat exchanger (coil)), using a contact
thermometer, measure the temperature before and after every restricting
device. If a big temperature difference is measured (>2.5~4K), an internal pipe
obstruction may be present at this location.
INFORMATION
Focus on positions with a potential risk for clogging such as:
▪
Filters
▪
Valves
▪
Brazing points
▪
…
INFORMATION
A bigger temperature drop before and after the expansion valve can be normal,
however excessive ice is indicating a malfunction of the expansion valve or internal
obstruction of the valve (dirt or ice build up in case of humidity in the system).
Содержание ALTHERMA
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