Step 1
Press
,
and button on the remote control simultaneously for more than 4 seconds.
SET
CL
TEST
When the group operation control is performe
d, the unit No. displayed for th
e first time is the header unit No.
At this ti
me, the
CODE No.(DN)shows
.Also,the fan
of the indoor unit selected starts its operation and
the swing operation also starts if it has the louvers.
Step 2 Every time when the button is pres
sed, the indo
or unit No. under the group control is displayed in order.
UNIT
LOUVER
Specify the indoor unit No.to be replaced.
1.
buttons for the temperature setting.
Change the CODE No.(DN) to by pressing /
(this is the setting for the filter sign lighting time.)
At thi
s time, be s
ure to write down the setting data displayed.
2. Change the CODE No.(DN) by pressing / buttons for the temperature setting.
Similar
ly, 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
EEPROM data read
out [1] (Refer to page 1)
Writing the read out EEPROM dat
a [3] (Refer to page 2.)
Case 2
The EEPROM before replacement is defective and the setting data cannot be read out.
based on the customer information
. [3] (Refer to page 2.)
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.
1
0
. Replacement of P.C. Board for Indoor Unit Servicing
<Models>
MMU-AP****HPUL 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 replac
ement, the indoor unit
can be turned on and the setting data can be read out by wired remote
control operation.
(MCC-1643)
table 1(example)on page 4.
*
he CODE No.
The CODE No.
The CODE No.(DN)are ranged from
(DN)are ranged from
to
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Summary of Contents for Carrier MMU-AP0074HPUL
Page 15: ...2 WIRING DIAGRAM 15 ...
