Troubleshooting - Daikin FXFN50A2VEB Installer And User Reference Manual

11 Troubleshooting

FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07
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
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.
Malfunction
If the system does not
operate at all.
Turn OFF all main power supply
switches to the unit.
Stop operation.
Turn OFF the power supply.
or an error code. Notify your installer and report
the error code. To display error
codes, see the reference guide
of the user interface.
A refrigerant leak may be
detected (see
refrigerant leak
detection" [
Measure
▪ Check if there is no power failure. Wait until
power is restored. If power failure occurs during
operation, the system automatically restarts
immediately after power is restored.
▪ Check if no fuse has blown or breaker is activated.
Change the fuse or reset the breaker if necessary.
11 Troubleshooting
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Installer and user reference guide
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