Toshiba MMU-AP0091H Owner's Manual Installation And Operation page 61

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 line from the header unit.
1. Turn off the power of the refrigerant line to be returned to the status at shipment from factory, and change the
header 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 header unit if it is ON.
(If it has been already ON, leave it as it is.)
Header unit
U3 U4
U1 U2
U1 U2
Remote
controller
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 header unit of
which address is to be cleared in the refrigerant line.
SW01 SW02 SW03
2 1 2
2 2 2
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 line. Check again the relay connector between [U1U2] and [U3U4] terminals.
NOTE) Be careful that the other refrigerant line address may be also cleared if clearing operation is not correctly
executed.
5. After clearing of the address, set up an address again.
Follower unit Header unit
U3 U4
U5 U6 U1 U2 U5 U6
U1 U2
A B A B
Remote
controller
Unit of which address is to be returned to the initial status
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.
Center unit Follower unit
U3 U4
U1 U2 U5 U6 U1 U2
U1 U2 U1 U2
A B A B
Remote
controller
SW04
58
Header unit Center unit
U3 U4 U3 U4
U5 U6 U1 U2 U5 U6
U1 U2
A B
Remote
controller
Address which can be cleared
Line + Indoor unit + Group address
Central control address
Central control
device
U1 U2
U3 U4