Toshiba MMD-AP0726HP-UL Service Manual page 78

B) In case that power of the indoor units cannot be turned on individually
a) Remove temporarily the group wire connected to the terminal blocks A and B of the exchanged
indoor unit.
b) After connecting the remote control wire only to the removed terminal block, turn on power of the
indoor units and proceed to [3].
∗ When the above methods cannot be used, follow to the two cases below.
C) In case that power of the indoor units cannot be turned in individually
a) Remove all CN41 connectors of the indoor units in the same group except those of the
exchanged indoor unit.
b) Turn on power of the indoor units and proceed to [3].
∗ After [3] operation has finished, be sure to return the temporarily removed group wire or CN41
connector to the original connection.
(Case 1)
Indoor unit
P.C. board
A B
Group wire
[3] Writing the setting data to EEPROM
The settings stored in the EEPROM of the P .C. board for indoor unit servicing are the factory-set values.
SET CL
Step 1 Push , and
∗ In the group control operation, the unit No. displayed for the first time is the header unit No.
At this time, the CODE No. (DN) shows "
operation .
(The unit No. "
Step 2 Every time when
are displayed in order.
(The settings stored in the EEPROM of the P .C. board for indoor unit servicing are the factory-set values.)
Specify the indoor unit No. with its P .C. board replaced to the P .C. board for indoor unit servicing.
(You cannot perform this operation if "
Step 3 Select the CODE No. (DN) can be selected by pushing the
• Set the indoor unit type and capacity.
The factory-set values shall be written to the EEPROM by changing
the type and capacity.
1. Set the CODE No. (DN) to "
2. Select the type by pushing
(For example, 4-way Cassette Type is set to "0001".
Refer to table 2)
SET
3. Push button.
(The operation completes if the setting data is displayed.)
4. Change the CODE No. (DN) to "
buttons for the temperature setting.
5. Select the capacity by pushing
(For example, AP027 Type is set to "0012". Refer to table 3)
SET
6. Push button.
(The setting completes if the setting data are displayed.)
Service P.C. board of
Indoor unit the unit to be changed
A B
Remove the group wire of
the terminal blocks
A and B of the changed
Remote
control indoor unit and then install
the remote control only.
TEST
buttons on the remote control simultaneously for more than 4 seconds.
" is displayed if the auto-address setting mode is interrupted in [2] step 2 a))
UNIT LOUVER
(left side button) button is pushed, the indoor unit No. in the group control operation
". (without change)
/ buttons for the timer setting.
" by pushing
/
Indoor unit
P.C. board
CN41
A B
Remove CN41 connectors of the
indoor units other than the units
to be changed in the same group.
". Also, the fan of the indoor unit selected starts its
" is displayed.)
/
/
buttons for the timer setting.
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(Case 1)
(Case 2)
(Case 2)
Service P.C. board of
Indoor unit the unit to be changed
A B A B
Group wire
Remote
control
button for the temperature setting.
<Fig. 1 RBC-AMT32UL>
3 6 5 1 4 2