9
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Troubleshooting
Installer and user reference guide
36
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
Malfunction
Measure
The system operates but
cooling is insufficient.
(for refrigerator and freezer
indoor units)
▪
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 high. Set the setpoint
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.
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).
9.1 Error codes: Overview
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
Cause
Solution
Electric leakage
Restart the unit. If the problem
reoccurs, contact your dealer.
The stop valve of an outdoor unit
is left closed.
Open the stop valve on both the
gas and liquid side.
The stop valve of an outdoor unit
is left closed.
Open the stop valve on both the
gas and liquid side.
The air passage is blocked.
Remove obstacles that block the
passage of air to the outdoor
unit.
