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Resetting to factory default address
Method 1
Follow steps 1 through 11 by using a direct wired remote control (page 22) to reset the line (system) address, indoor
unit addresses and group addresses to "0099".
Method 2
Clearing all the indoor unit addresses on a single refrigerant line and reset all addresses to the factory default settings
follow the steps below:
A. On the header outdoor unit, open the connector between (U1, U2) and (U3, U4) terminals.
B. On the header outdoor, interface PC board, SW30 dip switch 2, set to ON.
Header
unit
U3 U4
U1 U2
U1 U2
U1 U2
A B
A B
Remote
Remote
control
control
1
Turn on the indoor and outdoor units of the refrigerant line for the addresses to be initialized. About one
minute after turning on the power, confirm that the 7-segment display on the header outdoor unit
indicates "U.1. - - -" and operate the interface P.C. board on the header outdoor unit of the refrigerant line
as follows:
SW01
SW02
SW03
Confirm that the 7-segment display indicates "A.d.buS"
2
1
2
and turn SW04 ON for more than five seconds.
Confirm that the 7-segment display indicates "A.d.nEt"
2
2
2
and turn SW04 ON for more than five seconds.
2
Confirm that the 7-segment display indicates "A.d. c.L." and set SW01, SW02 and SW03 to 1, 1, 1
respectively.
3
After a time "U.1.L08" appears on the 7-segment display if the address clearing has been completed
successfully.
4
Set the addresses again after finishing the clearance.
EN-47
Central control
U1
U3
Header
Header
unit
unit
U3 U4
U3 U4
U1 U2
U1 U2
U1 U2
U1 U2
U1 U2
A B
A B
A B
Remote
Remote
control
control
Indoor units to have their addresses initialized
SW04
Clearable addresses
System/indoor unit/group address
Central control address
8
Test Run
CAUTION
• Turn on the power and turn on the case heater of the
compressor.
To save the compressor when it is activated, leave the
power on for more than 12 hours.
Methods of test run
A test run is executed by using a remote
control
U2
U4
Operate the system normally to check the running
condition using the wired remote control. Follow the
instructions in the supplied owner's manual when
operating the unit.
If a wireless remote control is used for operations, follow
the instructions in the installation manual supplied with
the indoor unit.
To execute a test run forcibly under the condition that the
thermostat automatically turns the unit off due to the
indoor temperature, follow the procedure below.
The forcible test run automatically stops after 60 minutes
to prevent continuous forcible running and return to
normal running.
CAUTION
Do not use forcible running except for a test run as it
overloads the unit.
TEMP.
TIMER SET
TIME
FILTER
RESET TEST
SET CL
1, 5
1
Push and hold the
seconds. TEST appears on the LCD and the unit
enters the TEST mode.
– 24 –
2
Push the
3
Push the
mode to COOL or HEAT.
NOTE
• Do not run the unit in any mode other than COOL or
HEAT.
• The temperature setting cannot be changed during the
test run.
• Trouble is are detected as usual.
4
Push the
finishing the test run.
The indication on the LCD display returns to the
status of procedure 1.
5
Push the
button to exit the test mode.
(TEST disappears on the LCD display and the
status changes to normal stopped mode.)
ON / OFF
2, 4
3
button for more than 4
TEST
button.
button to switch the running
TEST
button to stop running after
EN-48
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