10
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Troubleshooting
Installer and user reference guide
34
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
10.1 Error codes: Overview
In case a malfunction code appears on the indoor unit user interface display,
contact your installer and inform the malfunction code, the unit type, and serial
number (you can find this information on the nameplate of the unit).
For your reference, a list with malfunction codes is provided. You can, depending
on the level of the malfunction code, reset the code by pushing the ON/OFF
button. If not, ask your installer 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.
Lost phase in power supply.
Check the connection of the
power supply cable.
Insufficient supply voltage
Check if the supply voltage is
supplied properly.
Wrong transmission wiring
between units
Check the connection of
transmission wiring between the
outdoor unit and the air
conditioner.
Wrong combination of indoor
units
▪
Check
the
number
of
connected indoor units.
▪
Check if an indoor unit is
installed that is not a possible
combination.
Wrong transmission wiring
between units
Check the connection of
transmission wiring between the
outdoor unit and the air
conditioner.
Refer to the service manual for other malfunction codes.
If no malfunction code is displayed, check if:
▪
power of indoor unit is turned on,
▪
user interface wiring is broken or incorrectly wired,
▪
fuse on PCB has melted.
