EDUS39-605
Installation
Installation of Outdoor Units
34
•
Check that wiring lines do not make contact with refrig-
erant piping.
BEFORE OPERATION
Checks after completion of work
CAUTION
•
CAUTION Never connect power supply wiring to the ter-
minal block for remote controller wiring as this could
damage the entire system.
•
Attach the power wire securely.
•
To avoid injury, always make sure that the circuit breaker
on the power supply panel of the installation is switched
off before doing any work.
After the installation, check the following before switch-
ing on the circuit breaker:
1.
The position of the switches that requires an initial setting
Make sure that switches are set according to your applica-
tion needs before turning on the power supply.
2.
Power supply wiring and transmission wiring:
Use a designated power supply and transmission wiring
and make sure that it has been carried out according to the
instructions described in this manual, the wiring diagrams
and local and national regulations.
3.
Pipe sizes and pipe insulation:
Make sure that correct pipe sizes are installed and that the
insulation work is properly executed.
4.
Additional refrigerant charge:
The amount of refrigerant to be added to the unit should be
written on the included [
Additional Refrigerant Charge
]
label, and attach it to the rear side of the front cover.
5.
Measurement of insulation in the main power circuit:
Using a megatester for 500V, check that the insulation
resistance of 2MW or more is attained by applying a volt-
age of 500V DC between power terminals and ground.
Never use the megatester for the transmission wiring.
6.
Installation date:
Be sure to record the installation date on the [
Additional
Refrigerant Charge]
label.
Test Operation
After completing installation, be sure to open the valve. Oper-
ating the unit with the valve shut will break the compressor.
Power supply connection
When operating the unit for the first time after installation, be
sure to perform a test operation following these steps. Not per-
forming a test operation when the unit is first installed may
prevent the unit from operating properly.
•
During the operation, monitor the outdoor unit operation
status and check for any incorrect wiring.
Refer to figure 21.
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
.
•
The system may require up to 10 minutes until it can start
the compressor after an operation start. This is a normal
operation 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.
•
The check run cannot be performed in recovery or other
modes.
•
Before running a check on the unit, changing the indoor
remote controller settings might cause the error code [
UF
]
to be displayed and prevent a proper check to be run.
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.)