About Refrigerant Leak Detection - Daikin FXFN50A2VEB Installer And User Reference Manual

10 | Maintenance and service

10.5.1 About refrigerant leak detection

Installer and user reference guide
34
WARNING
The R744 refrigerant (CO
does NOT leak.
ALWAYS install a CO
If the refrigerant leaks in high concentrations in the room, it may have negative
effects on its occupants such as asphyxiation and carbon dioxide poisoning. Ventilate
the room and contact the dealer where you purchased the unit (see
refrigerant leak
Do NOT use the unit until a service person confirms that the part from which the
refrigerant leaked has been repaired.
In order to detect refrigerant leaks, a CO
MUST be installed. The CO
more details, see the documentation of the installed device.
In case a CO refrigerant leak is detected
2
▪ the fan of the indoor unit is stopped to prevent the refrigerant from being
spread,
▪ the user interface displays error code A0 or U9 (
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
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.
NOTICE
After the refrigerant leakage is detected, the unit will send a signal at regular
intervals to confirm if the CO
concentration is at a safe level, do NOT resume operation before the fault is fixed
and the refrigerant is refilled.
) inside the unit is odourless, non-flammable and normally
2
detector according to the specifications of standard EN378.
2
4
detection" [ 34]).
refrigerant leak detector (field supply)
2
refrigerant leak detector may require annual tests. For
2
concentration is at a safe level. Even when the CO
2
"10.5.1 About
for the Madoka; to display
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07
2
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