EDUS30-900-N
Installation
Installation of Outdoor Units
47
Cautions for check operation
• If the system is started within about 12 minutes after the outdoor/
indoor units are turned ON, the compressor will not run and H2P
lights up. Before starting an operation, always verify that the LED
display shows the contents of the table in “
11-3 Check operation
(6)”.
• The system may require up to 10 minutes until it can start the com-
pressor after an operation start. This is a normal operation to
equalize the refrigerant distribution.
• The check operation does not provide any means of checking the
indoor units individually. For that purpose, perform normal opera-
tion using the remote controller after the check operation.
• Check operation is not possible in other modes such as collection
mode.
• If the setting of indoor remote controller is changed before the
check operation, it may not be performed correctly and malfunc-
tion code “UF” may be displayed.
Remote controller displays malfunction code
11-4 Check of normal operation
After the check operation is completed, operate the unit normally.
(Heating is not possible if the outdoor temperature is 75 °F or higher.
Refer to the Operation manual.)
Check the below items.
•
Make sure the indoor and outside units are operating normally
(If a knocking sound can be heard in the liquid compression of
the compressor, stop the unit immediately and then energize
the heater for a sufficient length of time before restarting the
operation.)
•
Run each indoor unit one at a time and make sure the corre-
sponding outside unit is also running.
•
Check to see if cold (or hot) air is coming out of the indoor unit.
•
Press the fan direction and fan strength buttons on the indoor
unit to check if they operate properly.
NOTE
Cautions for normal operation check
•
Once stopped, the compressor will not restart in about 5 min-
utes even if the
Run/Stop
button of an indoor unit in the same
system is pressed.
•
When the system operation is stopped by the remote controller,
the outside units may continue operating for further 5 minutes
at maximum.
•
If the system has not undergone any check operation by the
test operation button since it was first installed, an malfunction
code “U3” is displayed. In this case, perform check operation
referring to “
11-3 Check operation
”.
•
After the test operation, when handing the unit over to the cus-
tomer, make sure the electric box lid, the service lid, and the
unit casing are all attached.
Malfunc-
tion code
Installation error
Remedial action
E3
E4
F3
F6
UF
U2
The stop valve of an out-
side unit is left closed.
Open the stop valve.
Check referring to the table in
“
9-9 Additional refrigerant
charge
”.
U1
The phases of the power
to the outside units are
reversed.
Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.
U1
U2
U4
No power is supplied to
an outside or indoor unit
(including phase inter-
ruption).
Check if the power wiring for
the outside units are connected
correctly.
(If the power wire is not con-
nected to L2 phase, no mal-
function display will appear and
the compressor will not work.)
Check if the ground fault circuit
interrupter in the outside unit is
ON.
UF
Incorrect transmission
between units
Check if the refrigerant piping
line and the unit transmission
wiring are consistent with each
other.
E3
F6
UF
U2
Refrigerant overcharge
Recalculate the required
amount of refrigerant from the
piping length and correct the
refrigerant charge level by
recovering any excessive
refrigerant with a refrigerant
recovery machine.
E4
F3
Insufficient refrigerant
•
Check if the additional refrig-
erant charge has been fin-
ished correctly.
•
Recalculate the required
amount of refrigerant from the
piping length and add an ade-
quate amount of refrigerant.
U7
UF
If an outside multi termi-
nal is connected when
there is one outside unit
installed
Remove the line from the out-
side multi terminals (Q1 and
Q2).
UF
E4
The operation mode on
the remote controller was
changed before the
check operation.
Set the operation mode on all
indoor unit remote controllers
to “cooling.”
HJ
The heat source water is
not circulating.
Make sure that the water pump
is running.
U3
The check operation has
not been performed.
Perform the check operation.
Summary of Contents for 80PTJU
Page 1: ...EDUS 30 900 N AMERICAS AMERICAS Installation ...
Page 17: ...REFNET Pipe System EDUS30 900 N 16 Installation of Outdoor Units 3P161697D ...
Page 21: ...REFNET Pipe System EDUS30 900 N 20 Installation of Outdoor Units C 3P113151C 7 8 1 1 1 8 ...
Page 23: ...REFNET Pipe System EDUS30 900 N 22 Installation of Outdoor Units C 3P113623C 7 8 1 1 1 8 ...
Page 25: ...REFNET Pipe System EDUS30 900 N 24 Installation of Outdoor Units 3P185500 ...
Page 27: ...REFNET Pipe System EDUS30 900 N 26 Installation of Outdoor Units 1P185542 ...