9 Hand-over to the user
Installer and user reference guide
19
FDA125A5VEB
Split system air conditioners
4P495031-1A – 2019.03
INFORMATION
Backlight.
To perform an ON/OFF action on the user
interface, the backlight does not need to be lit. For any
other action, it needs to be lit first. The backlight is lit for
±30 seconds when you press a button.
1
Perform introductory steps.
#
Action
1
Open the liquid stop valve (A) and gas stop valve (B)
by removing the stem cap and turning
counterclockwise with a hex wrench until it stops.
A
B
2
Close the service cover to prevent electric shocks.
3
Turn ON power for at least 6 hours before starting
operation to protect the compressor.
4
On the user interface, set the unit to cooling operation
mode.
2
Start the test run
#
Action
Result
1
Go to the home menu.
Cool
Set to
28
°C
2
Press at least 4 seconds.
The Service Settings menu
is displayed.
3
Select Test Operation.
Return
Setting
Service Settings 1/3
Test Operation
Maintenance Contact
Field Settings
Demand
Min Setpoints Differential
Group Address
4
Press.
Test Operation is
displayed on the home
menu.
Cool
Return
Setting
Test Operation
5
Press within 10 seconds.
Test run starts.
3
Check operation for 3 minutes.
4
Stop the test run.
#
Action
Result
1
Press at least 4 seconds.
The Service Settings menu
is displayed.
#
Action
Result
2
Select Test Operation.
Return
Setting
Service Settings 1/3
Test Operation
Maintenance Contact
Field Settings
Demand
Min Setpoints Differential
Group Address
3
Press.
The unit returns to normal
operation, and the home
menu is displayed.
8.4
Error codes when performing a
test run
If the installation of the outdoor unit has NOT been done correctly,
the following error codes may be displayed on the user interface:
Error code
Possible cause
Nothing displayed
(the currently set
temperature is not
displayed)
▪ The wiring is disconnected or there is a
wiring error (between power supply and
outdoor unit, between outdoor unit and
indoor units, between indoor unit and
user interface).
▪ The fuse on the outdoor or indoor unit
PCB has blown.
E3, E4 or L8
▪ The stop valves are closed.
▪ The air inlet or air outlet is blocked.
E7
There is a missing phase in case of three-
phase power supply units.
Note:
Operation will be impossible. Turn
OFF the power, recheck the wiring, and
switch two of the three electrical wires.
L4
The air inlet or air outlet is blocked.
U0
The stop valves are closed.
U2
▪ There is a voltage imbalance.
▪ There is a missing phase in case of
three-phase power supply units.
Note:
Operation will be impossible. Turn OFF
the power, recheck the wiring, and switch
two of the three electrical wires.
U4 or UF
The inter-unit branch wiring is not correct.
UA
The outdoor and indoor unit are
incompatible.
9
Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation at the URL mentioned earlier in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do for the maintenance of the unit.
