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Outdoor Unit
Installation Manual
Outdoor Unit
Installation Manual
2 Turn on the indoor and outdoor units of the refrigerant line for which you want to initialize the
addresses. About one minute after turning on the power, confirm that the 7-segment display on
the outdoor unit indicates “U.1. - - -” and operate the interface P.C. board on the outdoor unit of
the refrigerant line as follows.
3 Confirm that the 7-segment display indicates “A.d. c.L.” and set SW01, SW02 and SW03 to 1, 1, 1
respectively.
4 After a time “U.1.L08” appears on the 7-segment display if the address clearing has been
completed successfully.
If the 7-segment display indicates “A.d. n.G.”, the outdoor unit may still connected with other
refrigerant lines. Check the connection of the relay connectors between [U1, U2] and [U3, U4].
Take care to carry out the procedure above correctly; otherwise, addresses in other refrigerate lines may also be
cleared.
5 Set the addresses again after finishing the clearance.
SW01 SW02 SW03 SW04 Clearable addresses
212
Confirm that the 7-segment display indicates
“A.d.buS” and turn SW04 ON for more than five
seconds.
System / indoor unit / group address
222
Confirm that the 7-segment display indicates
“A.d.nEt” and turn SW04 ON for more than five
seconds.
Central control address
8 Test run
Before test run
Confirm that the valve of the refrigerate pipe of the outdoor unit is OPEN.
• Before turning on the power, confirm that the resistance between the terminal block of power supply and the
earth is more than 1 M using a 500 V megohmmeter.
Do not run the unit if it is less than 1 M.
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
◆ When executing a test run using a remote controller
Operate the system normally to check the running condition using the wired remote controller. Follow the
instructions in the supplied owner’s manual when operating the unit.
If you use a wireless remote controller 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 will automatically stop after 60 minutes to prevent continuous forcible running and return to
normal running.
Do not use forcible running except for a test run as it overloads the unit.
1, 5
3
2, 4
ON / OFF
TEMP.
TIME
SET CL
FILTER
RESET
TEST
TIMER SET
53-EN 54-EN
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