Error Codes: Overview - Daikin LREN8A7Y1B Installer And User Manual

9 | Troubleshooting

9.1 Error codes: Overview

Installer and user reference guide
36
Malfunction
The system operates but
cooling is insufficient.
(for refrigerator and freezer
indoor units)
If after checking all above items, it is impossible to fix the problem yourself, contact
your installer and state the symptoms, the complete model name of the unit (with
manufacturing number if possible) and the installation date (possibly listed on the
warranty card).
For your reference, a list with malfunction codes is provided. In case a malfunction
code appears, contact your installer to inform him of the malfunction code and ask
for advice.
Code
Electric leakage
The stop valve of an outdoor unit
is left closed.
The stop valve of an outdoor unit
is left closed.
The air passage is blocked.
▪ Check if air inlet or outlet of outdoor or indoor
unit is not blocked by obstacles. Remove any
obstacles and make sure the air can flow freely.
▪ Check if the indoor unit is not frosted up. Defrost
the unit manually, or shorten the defrost
operation cycle.
▪ Check if there are not too many articles inside the
room/showcase. Remove a couple of articles.
▪ Check if there is smooth air circulation inside the
room/showcase. Reorganise the articles inside the
room/showcase.
▪ Check if there is not too much dust on the outdoor
unit heat exchanger. Remove the dust with a
brush or vacuum cleaner, without using water. If
necessary, consult your dealer.
▪ Check if there is cold air leaking outside of the
room/showcase. Stop the air from leaking outside.
▪ Check if you did not set the indoor unit setpoint
temperature too
appropriately.
▪ Check if there are no high-temperature articles
stored in the room/showcase. Always store
articles after they have cooled down.
▪ Check if the door is not opened too long. Reduce
the opening time of the door.
Cause
Restart the unit. If the problem
reoccurs, contact your dealer.
Open the stop valve on both the
gas and liquid side.
Open the stop valve on both the
gas and liquid side.
Remove obstacles that block the
passage of air to the outdoor
unit.
Measure
high. Set the setpoint
Solution
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08