Replacement Of P.c. Board For Indoor Unit Servicing - Toshiba MMK-UP0051DHPL-E(TR) Service Manual

12. Replacement of P.C. Board for Indoor Unit Servicing

<Models>
MMK-UP****DHPL Series
<Note : when replacing the P.C. board for indoor unit servicing>
The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P.C. board before replacement includes
the model specific type information and capacity codes as the factory-set value and the important setting data which have
been automatically or manually set when the indoor unit is installed, such as system/indoor/group addresses, high ceiling
select setting, etc. When replacing the P.C. board for indoor unit servicing, follow the procedures below.
After replacement completes, confirm whether the settings are correct by checking the indoor unit No.,Group header unit/
follower unit settings and perform the cooling cycle confirmation through the trial operation.
<Replacement procedures>
Case 1
Before replacement, the indoor unit can be turned on and the setting data can be read out by wired remote
control operation.
Case 2
The EEPROM before replacement is defective and the setting data cannot be read out.
Power reset (for all indoor units connected to the remote control when the group operation control is performed.)
[1] Setting data read out from EEPROM
The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out.
SET CL
Step 1 Press
, and
When the group operation control is performed, the unit No. displayed for the first time is the header unit No.
At this time, the CODE No.(DN)shows
the swing operation also starts if it has the louvers.
Step 2 Every time when the
Specify the indoor unit No.to be replaced.
1. Change the CODE No.(DN) to
(this is the setting for the filter sign lighting time.)
At this time, be sure to write down the setting data displayed.
2. Change the CODE No.(DN) by pressing
Similarly, be sure to write down the setting data displayed.
3. Repeat the step 2-2 to set the other settings in the same way and write down the setting data as shown in the
table 1(example)on page 4.
*
The CODE No.(DN)are ranged from
EEPROM data read out [1] (Refer to page 1)
Writing the read out EEPROM data [3] (Refer to page 2.)
based on the customer information. [3] (Refer to page 2.)
TEST
button on the remote control simultaneously for more than 4 seconds.
UNIT LOUVER
button is pressed, the indoor unit No. under the group control is displayed in order.
.Also,the fan of the indoor unit selected starts its operation and
by pressing / buttons for the temperature setting.
/ buttons for the temperature setting.
to .The CODE No.(DN) may skip.
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