Samsung AM080FXWANR, Service Manual

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Troubleshooting
Samsung Electronics 81
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Initial Tracking (Communication Check-up)- Display for Problem
1. For the display module of the outdoor unit, there are differences in the contents displayed depending on whether the relevant outdoor unit
is a master unit or a sub unit.
1) Master Unit
Ɣ
The outdoor unit Micom attempts communication with the indoor unit connected to the communication cable (F1/F2) when the power is
turned on.
Ɣ
Basic segment display
Ɣ
If the number of indoor units set by the outdoor unit is not in accordance with the number of indoor units that succeeded with communi-
cation, then the four displaying parts will display
.
2) Sub(Slave) Unit
Ɣ
The two left hand displays show its own address and the two right hand displays show the outdoor unit's address.
Main address : C8, Sub1 address : C9, Sub2 address : CA, Sub3 address : CB
2. The number of the indoor Units Connected to the outdoor unit can be configured by using the indoor unit installation quantity setup
switch.
Indoor Unit
Installed
Quantity
MCU
Installed
Quantity
g
SEG1
a f G1
G2
b c e d
SEG2
g
SEG3
a f G1
G2
b c e d
SEG4
Outdoor Unit Display Parts
Step Display content Display
At initial power input
Checking segment
display
SEG1 SEG2 SEG3 SEG4
"8" "8" "8" "8"
While setting
communication
between indoor and
outdoor unit
(Addressing)
Number of
connected
indoor units
SEG1 SEG2 SEG3, 4 SEG3, 4
"A" "d"
Number of
communicated units
ఐ͑
Refer to
"View Mode" for
communication
address
After communication
setting
(usual occasion)
Transmit/Reception
address
SEG1 SEG2 SEG3, 4 SEG3, 4
I/U : “A”
MCU : “C”
I/U : “0”
MCU : “1”
Reception address
(in decimal number)
ఐ
I/U : Indoor unit
4-3 Appropriate Measures for Different Symptom (cont.)
4-3-1 Outdoor Unit Test Operation Flow (cont.)