At this time, the CODE No. (DN)shows . Also, the fan of the indoor unit selected starts its operation and
In the group control operation, the unit No. displayed for the first time is the header unit No.
Press , and buttons on the remote control simultaneously for more than 4 seconds.
The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.
the swing operation starts if it has the louvers.
[3] Writing the setting data to EEPROM
*
Step 1
SET
CL
TEST
(The unit No. is displayed if the auto-address setting mode is interrupted in [2] step 2 a) 2. on pervious
page.)
A B
Remote
controller
Group wire
Indoor unit P.C.board
Service P.C.board of the unit to
Remove the group wire of the
terminal blocks A and B of the
changed indoor unit, and then
be changed.
install the remote controller only.
Remote
controller
Group wire
Service P.C.board of the unit to
Remove CN41 connectors of the indoor units other than
the units to be changed in the same group.
be changed.
X
(Case 1)
CN
41
Indoor unit P.C.board
(Case 2)
A B
A B
A B
A B
I
t is necessary to set Indoor unit to be exchanged : Remote controller = 1:1
Based upon the system configuration, turn on power of the indoor unit with one of the following items.
1) Single (Individual) operation
Turn on power of the indoor units and proceed to
2) Group operation
When the above methods cannot be us
ed, follw
er to the two cases below.
[3].
indoor units and proceed to
A)
In case that power of the exchanged indoor unit only can be turned on
Turn on power of the exchanged indoor unit only
and proceed to [3].
B)
In case that power of the indoor units cannot be turned on individually (Case 1)
a)
Remove temporarily the group wire connected to the terminal blocks A and B of the exchanged
indoor unit.
b)
After connecting the remote controller wire only to the removed terminal blo
ck, turn on powe
r of the
[3].
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
(Case 2)
indoor unit.
b) Turn on power of the indoor units and pr
oceed to [3].
Step 2
button to return to the normal stop status.
(It takes approx. 1 min until the remote control operation is available again.)
CODE No.required at least
[2] P.C. Board for indoor unit servicing replacement procedures
Step 1 Replace the P.C. board to the P.C. board for i
ndoor 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.
Step 3
After writing down all setting dat
a, press
DN
Contents
10
Type
11
Indoor unit capacity
12
System address
13
Indoor unit address
14
Group address
1.
2.
The CODE No. for the Indoor unit type and Indoor unit capacity
are required to set the rotation number setting of the fan.
If the system/indoor/group addresses are different from those
before replac
ement, the
auto-address setting mode starts and the
manual resetting may be required again.
(when the multiple units group operation including twin system.)
FC
Communication protocol
1FC
I
f the plug for short-circuit is attached on the P.C. board
before replacement, attach it on the P.C. board replaced.
Connector (CN504)
for drain pump
J08
J01
J09
CN34
(Red)
(White)
CN504
SW501
TEST
[3]
After operation has finished, be sure to return the temporarily removed group wire or
CN41 connector to the original connection.
- 93 -
Summary of Contents for Carrier MMU-AP0074HPUL
Page 15: ...2 WIRING DIAGRAM 15 ...
