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Maintenance and service
Installer and user reference guide
31
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1A – 2020.05
Refrigerant type: R744 (CO
2
)
WARNING
▪
Do NOT pierce or burn refrigerant cycle parts.
▪
Do NOT use cleaning materials other than those recommended by the
manufacturer.
▪
Be aware that the refrigerant inside the system is odourless.
WARNING
The refrigerant R744 (CO
2
) inside the unit is odourless, non-flammable and, in
moderate concentrations, non-toxic, and normally does NOT leak.
If the refrigerant leaks in the room, it may have negative effects on its occupants
(asphyxiant in high concentrations). Ventilate the room and contact the dealer where
you purchased the unit (see
"10.5.1 About refrigerant leak detection"
Do NOT use the unit until a service person confirms that the part from which the
refrigerant leaked has been repaired.
10.5.1 About refrigerant leak detection
In order to detect refrigerant leaks, a CO
2
refrigerant leak detector (field supply)
MUST be installed. The CO
2
refrigerant leak detector may require annual tests. For
more details, see the documentation of the installed device.
In case a CO
2
refrigerant leak is detected
▪
the fan of the indoor unit is stopped to prevent the refrigerant from being
spread,
▪
the user interface displays error code A0 or U9 ( for the Madoka; to display
error codes, refer to the reference guide of the Madoka),
▪
a warning sound will come from the user interface ( only for Madoka with buzzer,
see option list) or from another safety alarm in combination with a CO
2
refrigerant leak detector (field supply).
Actions required by the user
1
Ventilate the room and immediately contact the dealer where you purchased
the unit. Do NOT use the unit before the fault is fixed.
Actions required by the installer or the service person
INFORMATION
During detection of the refrigerant leakage, the contact between terminals T1 and T2
disconnects. During normal operation, the contact between terminals T1 and T2 is
closed (acting as a short circuit).
1
If field supplied stop-valves are NOT installed: Close the stop valves of the gas
and liquid pipe on the outdoor unit.
2
If field supplied shut-off valves are installed: If the refrigerant leak to the room
has stopped, you can use the air conditioner for other rooms where the
refrigerant leak did NOT occur.
3
Locate and repair the cause of the refrigerant leak. If necessary, replace the
indoor unit.
4
Refill the refrigerant if needed.
5
Perform manual power reset and resume operation.
