Samsung AR07CXCAAWKNEU - Pre-Inspection Notices; Inspection Procedure; Inspection Method

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10-2-1 Pre-inspection Notices
1
Check if you pulled out the AC power plug when you eliminate the PCB or front panel.
2 Don’t hold the PCB side not impose excessive force on it to eliminate the PCB.
3 Don’t pull the lead wire but hold the whole housing to connect or disconnect a connector to the PCB.
4 IncaseofoutdoorPCBdisassembly,checkrstthecompletedischargeofcondenserafter1minute
power off.
10-2-2 Inspection procedure
1
Check connector connection and peeling of PCB or bronze coating pattern when you think the PCB is
broken.
2 The PCB is composed of 3 parts.
• IndoorMainpart:MICOMandsurroundingcircuit,relay,fanmotorsensinganddrivingcircuit,
temperature sensing circuit power circuit of SMPS, buzzer circuit. Communication circuit.
• Displaypart:LEDlamp,Switch,Remote-controlmodule.
• OutdoorMainpart:MICOMandsurroundcircuit,fanmotorsensinganddrivingcircuit,compressor
driving circuit power circuit of SMPS, PFC control circuit, 4way circuit, communication circuit, OPTION
(EEV control circuit, temperature sensing circuit).
10-2-3 Indoor detailed inspection procedure
No. Procedure Inspection Method Cause
1
Plug out and pull the PCB
out of the control box
Check the PCB fuse
1) Is 1st fuse disconnected?
2) Is 2nd fuse disconnected?
• Over current
• Indoor Fan motor short
• AC part and pattern short
of Indoor PBA
2
Supply power
If the operating lamp
twinkles
at this time , the above
1)~3) have no relation
Check the power voltage
1) Is the BD71 input voltage
200Vac~240Vac?
• Power cord is fault, Fuse
open, Wrong Power cable
Wiring, AC part is faulty
2) Is the voltage between both
terminalofIC02pin#1-#212Vdc?
• Switching Trans of Power
circuit is faulty
3) Is the voltage between both
terminalofIC02pin#2-#35Vdc?
• Power circuit is faulty, Load
short
3
Press the ON/OFF button
1. Fan speed(high)
2. Continuous Operation
1) Is the voltage over AC 180V being
imposedonterminal#3-#5offan
motor connector (CN72)?
• Fan motor of the indoor is
faulty
2) The fan motor of the indoor unit
doesn’t run
• Fan motor connector(CN72)
is faulty
3) The power voltage between
terminal#3-#5ofthe
connector(CN72) is 0V
• PBA is faulty