About The Refrigerant; About Refrigerant Leak Detection; Troubleshooting; Relocation - Daikin FXFN50A2VEB Installation And Operation Manual

8 Troubleshooting

7.3

About the refrigerant

This product contains refrigerant gases.
Refrigerant type: R744 (CO )
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WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The R744 refrigerant (CO
non-flammable and normally does NOT leak.
ALWAYS install a CO
specifications of standard EN378.
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 "7.3.1 About refrigerant leak
Do NOT use the unit until a service person confirms that
the part from which the refrigerant leaked has been
repaired.
7.3.1

About refrigerant leak detection

In order to detect refrigerant leaks, a CO
(field supply) MUST be installed. The CO
may require annual tests. For more details, see the documentation
of the installed device.
In case a CO refrigerant leak is detected
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▪ the fan of the indoor unit is stopped to prevent the refrigerant from
being spread,
▪ the user interface displays error code A0 or U9 (
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 refrigerant leak detector (field supply).
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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.
Installation and operation manual
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) inside the unit is odourless,
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detector according to the
2
detection" [ 4 12]).
refrigerant leak detector
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refrigerant leak detector
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for the
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. Even when the CO
concentration is at a safe level, do NOT resume operation
before the fault is fixed and the refrigerant is refilled.
8 Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
WARNING
Stop operation and shut OFF the power if anything
unusual occurs (burning smells etc.).
Leaving the unit running under such circumstances may
cause breakage, electrical shock or fire. Contact your
dealer.
The system MUST be repaired by a qualified service person.
Malfunction
If a safety device such as a fuse, a
breaker or an earth leakage breaker
frequently actuates or the ON/OFF
switch does NOT function properly.
If water leaks from the unit.
The operation switch does NOT function
properly.
If the user interface displays
error code.
The user interface displays error code
A0 or U9 (or ), the fan stops and you
can hear a warning sound from the user
interface (in case of Madoka) or from
another safety alarm in combination
with a gas detection device (if installed).
If the system does NOT operate properly except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system in accordance with the following
procedures.
INFORMATION
Refer to the reference
www.daikineurope.com/support-and-manuals/product-
information/ for more troubleshooting tips.
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

Relocation

Contact your dealer for removing and reinstalling the total unit.
Moving units requires technical expertise.
10

Disposal

NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
Measure
Turn OFF all main power
supply switches to the
unit.
Stop operation.
Turn OFF the power
supply.
Notify your installer and
or an
report the error code. To
display error codes, see
the reference guide of the
user interface.
A refrigerant leak may be
detected (see "7.3.1 About
refrigerant leak
detection" [ 4 12]).
guide located on http://
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
3P672850-1A – 2021.07
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