15
English
8-2 Test run
Caution
After completing installation, be sure to open the valve. (Operat-
ing the unit with the valve shut will break the compressor.)
Power supply connection
When running the unit for the first time after installation, be sure to
perform a test run following these steps for test run. (Not performing
a test run 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 22)
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 “8-2 Test run 2.”.
•
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 checking the
indoor units individually. For that purpose, perform normal opera-
tion using the remote controller after the check operation.
Remote controller displays an error:
Temperature adjustment operation confirmation
•
After the test run is over, operate the unit normally. (Heating is not
possible if the outdoor temperature is 24°C or higher.)
•
Make sure the indoor and outdoor 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 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 fan strength buttons on the indoor
unit to see if they operate properly.
Caution
〈〈〈〈
Cautions for normal operation check
〉〉〉〉
•
Once stopping, the compressor will not restart in about 5 minutes
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 outdoor 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 error code “U3” is
displayed. In this case, perform check operation referring to
“
8-2 Test run
”.
•
After the test run, when handing the unit over to the customer,
make sure the electric box lid, the service lid, and the unit casing
are all attached.
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.)
.
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.)
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
(Default status
before delivery)
One outdoor unit installed
When multiple
outdoor unit
installed (
∗
)
Master station
Sub station 1
Sub station 2
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
LED display:
OFF
ON
Blinking
(
∗
) 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.
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
Malfunction
code
Installation error
Remedial action
E3
E4
F3
UF
The shutoff valve
of an indoor unit
is left closed.
Check referring to the table in
“
6-6 Additional Refrigeran
Charge
”.
U1
The phases of
the power to the
outdoor units are
reversed.
Exchange two of the three phases
(L1, L2, L3) to make a positive phase
connection.
U1
U4
No power is
supplied to an
outdoor or
indoor unit
(including phase
interruption).
Check if the power wiring for the out-
door units are connected correctly.
(If the power wire is not connected to
L2 phase, no malfunction display will
appear and the compressor will not
work.)
UF
Incorrect inter-
connections
between units
Check if the refrigerant line piping
and the unit wiring are consistent
with each other.
E3
F6
UF
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 refrigerant
charge has been finished correctly.
• Recalculate the required amount
of refrigerant from the piping
length and add an adequate
amount of refrigerant.
U7
UF
If an outdoor
multi terminal is
connected when
there is one
outdoor unit
installed
Remove the line from the outdoor
multi terminals (Q1 and Q2).
01_3P114261-9L-EN.fm Page 15 Thursday, August 28, 2003 3:33 PM
