Installation Manual
– 34 –
EN
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
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
and set SW01, SW02 and SW03 to 1, 1, 1
respectively.
4
After a time
appears on the 7-segment display if the address clearing has been completed
successfully.
If
appears on the 7-segment display, the outdoor unit may still be connected to another
refrigerant line. Check again the connection of the relay connectors (CN10) between the [U1, U2] and [U3,
U4] terminals.
NOTE
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
2
1
2
Confirm that the 7-segment display indicates
and turn SW04 ON for more than
five seconds.
System / indoor unit / group address
2
2
2
Confirm that the 7-segment display indicates
and turn SW04 ON for more than
five seconds.
Central control address
U. 1. - - -
A.d.buS
A.d.nEt
A.d. c.L.
U.1.L08
A.d. n.G.
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
Ω
using a 500 V megohmmeter.
Do not run the unit if it is less than 1 M
Ω
.
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
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.
CAUTION
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
EN-67
EN-68
