Toshiba MMU-UP0071YHP-UL Service Manual page 98

CODE No. required at least
DN Contents
0010 Type
0011 Indoor unit capacity
0012 System address
0013 Indoor unit address
0014 Group address
[2] P.C. Board for indoor unit servicing replacement procedures
Step 1 Replace the P.C. board to the P.C. board for indoor unit servicing.
At this time, perform the same setting of the jumper wire (J01, J08, J09) setting (cut), switch SW501,
(short-circuit) connector CN34 as the setting of the P.C. board before replacement.
The short-circuit connector is
attached on the P.C. board
before replacement, attach it
on the P.C. board replaced.
Step 2 According to the system configuration, turn on the indoor unit following to the either methods shown below.
a) Single operation (Indoor unit is used as standalone.)
Turn on the indoor unit.
1. After completion of the auto-address setting mode (required time: approx. 5 min.), proceed to [3].
(System address = 1, Indoor unit address = 1, Group address = 0 (standalone) are automatically set.)
2. Interrupt the auto-address setting mode, and proceed to [3].
b) Group operation (including twin triple and double twin system)
Turn on the indoor unit(s) with its P.C. board replaced to the P.C. board for indoor unit servicing,
according to either methods 1 or 2 shown below.
1. Turn on only the indoor unit with its P.C. board replaced. (Be sure to confirm the remote controller
is surely connected. If not, the operation [3] cannot be performed.)
Perform either methods 1 or 2 described in item a) above.
2. Turn on the multiple indoor units including the indoor unit with its P.C. board replaced.
• Twin or triple or double twin 1 system only
• All group connections
After completion of the auto-address setting mode (required time: approx. 5 min.), proceed to [3].
∗ The header unit of the group may be changed by performing the auto-address setting.
Also, the system address/Indoor unit address of the indoor unit with its P.C. board replaced may be
assigned to the addresses (not used) other than those of the indoor units without its P.C. board
replaced.
It is recommended to keep the information in advance, which refrigerant system the indoor unit
belongs to or whether the indoor unit works as the header unit or the follower unit in the group
control operation.
1. The CODE No. for the Indoor unit type and Indoor unit capacity are
required to set the rotation number setting of the fan.
2. If the system/indoor/group addresses are different from those
before replacement, the auto-address setting mode starts and the
manual resetting may be required again.
(when the multiple units group operation including twin system.)
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