Installation Instructions
35
Clearance of address (Return to status (Address undecided) at shipment from factory)
Method 1
An address is individually cleared from a wired remote controller.
“0099” is set up to line address, indoor address, and group address data from the wired remote controller.
(For the setup procedure, refer to the above-mentioned address setup from the wired remote controller.)
Method 2
Clear the indoor addresses in the same refrigerant system from the outdoor unit.
1. Turn off the power of the refrigerant system to be returned to the status at shipment from factory, and change the
outdoor unit to the following status.
1) Remove the relay connector between [U1U2] and [U3U4].
(If it has been already removed, leave it as it is.)
2) Turn on SW30-2 on the interface P.C. board of the outdoor unit if it is ON.
(If it has been already ON, leave it as it is.)
2. Turn on the indoor/outdoor power of which address is to be cleared. After approx. 1 minute, check that
“U.1. - - -” is displayed, and then execute the following operation on the interface P.C. board of the outdoor unit of
which address is to be cleared in the refrigerant system.
3. After “A.d. c.L.” has been displayed on 7-degment display, return SW01/SW02/SW03 to 1/1/1.
4. When the address clearing has correctly finished, “U.1.L08” is displayed on 7-degment display after a while.
If “A.d. n.G.” is displayed on 7-degment display, there is a possibility which is connected with the other
refrigerant system. Check again the relay connector between [U1U2] and [U3U4] terminals.
Note) Be careful that the other refrigerant system address may be also cleared if clearing operation is not
correctly executed.
5. After clearing of the address, set up an address again.
SW01 SW02 SW03
212
222
SW04
After checking that “A.d.buS” is displayed on 7-degment
display, and then push SW04 for 5 seconds or more.
After checking that “A.d.nEt” is displayed on 7-degment
display, and then push SW04 for 5 seconds or more.
Address which can be cleared
Line + Indoor + Group address
Central address
U3 U4
U1 U2
U1 U2
A B
Outdoor unit
Remote
controller
U1 U2
A B
Remote
controller
U3 U4
U1 U2
U1 U2
A B
Remote
controller
U1 U2
A B
U3 U4
U1 U2
U1
U3
U2
U4
U1 U2
A B
Remote
controller
Center unit Center unit
Outdoor unit Outdoor unit
Central control
device
Unit of which address is to be returned to the initial status
6
ADDRESS SETUP