EDUS39-605
Installation
Installation of Outdoor Units
56
age of 500V DC between power terminals and earth. Never
use the megatester for the transmission wiring.
4.
Installation Date:
Be sure to keep record of the installation date on the
[Additional Refrigerant]
label.
Test operation
NOTE
•
After completing installation, be sure to open the valves.
Operating the unit with the valves shut breaks the com-
pressor.)
Power supply connection
Perform a test operation after installation to ensure the unit is
operating properly.
•
During the operation, monitor the outdoor unit operation
status and check for any incorrect wiring.
(Refer to figure 19, page 39)
1.
Electric box lid
2.
Service lid
3.
[
Service precautions
] Label location
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 Section 8-2, Test Operation 2.
•
Upon startup, the system may require up to 10 minutes to
start the compressor in order to equalize the refrigerant
distribution.
•
The check operation does not provide any means of check-
ing the indoor units individually. For that purpose, perform
normal operation using the remote controller after the
check operation.
Remote controller displaysmalfunction codes and the solutions
are as follows:
Temperature adjustment operation confirmation
•
After the test operation is over, operate the unit normally.
Heating is not possible if the outdoor temperature is 75°F or
higher.
•
Make sure the indoor and outdoor units are operating
normally.
If a knocking sound can be heard in the liquid compres-
sion of the compressor, stop the unit immediately and
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
corresponding outdoor unit is also running.
•
Check to see if cold (or hot) air is coming out of the
indoor unit.
•
Press the fan direction and speed buttons on the indoor
unit to see if they operate properly.
1. Turn ON the power to the outdoor
units and indoor units.
3.
.
As necessary, configure the system
settings onsite by using the dipswitch
(DS1) on the outdoor unit P-board
(A1P) and push button switches
(BS1 to 5).
Always perform configuration after turning ON the
power. To learn the setting method, refer to the
[Service Precautions] label attached at the
position shown in the figure on the right
(Electric box lid in outdoor unit).
(Remember, the actual settings you have made
must be recorded on the [Service Precautions]
label.)
2. Check the LED on the P-board (A1P) in the outdoor unit to see if the data transmission
is performed normally.
Make sure to turn ON the power 6 hours before
starting the operation. This is necessary to warm
the crankcase preliminarily by the electric heater.
LED display:
OFF
ON
Blinking
4. Check if the shutoff valves are in
appropriate status and correct any
wrong status. (Refer to the table in
“6-6 Additional Refrigerant Charge”.)
5. Perform the check operation
following the instructions printed
on the [Service Precaution] label.
Do not leave any shutoff valve closed.
Otherwise the compressor will fail.
The system operates for about 15 minutes
(30 minutes at maximum) and automatically
stops the test operation. The system can start a
normal operation about 15 minutes after the test
operation, only if the remote controller displays
no error codes.
Caution
LED display
(Default status
before delivery)
One outdoor unit installed
When multiple
outdoor unit
installed (*)
Master station
Microcomputer
operation
monitor
Page
HAP
H1P
H2P
H3P
H4P
H5P
H6P
H7P
H8P
Ready/
Error
Cooler/heater changeover
Individual
Bulk
(parent)
Bulk
(child)
Low
noise
Demand
Multi
Sub station
(*) The base (parent) unit is the outdoor unit to which the interconnecting wiring for the
indoor units is connected. The other outdoor units are child units.
.
When the system is in the multiple-
outdoor unit configuration (Out Multi),
perform the configuration on the parent
unit. (Any settings made on a child unit
will be ignored.)
Installation error
Malfunc-
tion code
Solution
The stop valve of an out-
door unit is left closed.
E3
E4
F3
UF
Check referring to the table in
6-6 Additional Refrigerant
Charge
.
The phases of the power
to the outdoor units are
reversed.
U1
Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.
No power is supplied to
an outdoor or indoor unit,
including phase interrup-
tion.
U1
U4
Check if the power wiring for the
outdoor units are connected
correctly.
If the power wire is not connected
to L2 phase, no malfunction dis-
play will appear and the com-
pressor will not work.
Incorrect interconnec-
tions between units
UF
Check if the refrigerant line piping
and the unit wiring are consistent
with each other.
Refrigerant
overcharge
E3
F6
UF
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.
Insufficient
refrigerant
E4
F3
Check if the additional refrigerant
charge is correct.
Recalculate the required amount
of refrigerant from the piping
length and add an adequate
amount of refrigerant.
If an outdoor multi
terminal is connected
when there is one
outdoor unit installed
U7
UF
Remove the line from the out-
door multi terminals (Q1 and
Q2).
The check operation has
not been performed.
U3
Perform the check operation.
