Samsung AR18TSFYBWKNCV - Page 95

10-3
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 Ãʀɇϑʪͱ˙ͱЇϩʒͱͱθťA9ʒϑɇϑϑʪɵцࡥʀ˵ʪʀѣθϑϩϩ˵ʪʀͱΧʪϩʪʒϑʀ˵ɇθ˝ʪͱ˙ʀͱʒʪϑʪθɇ˙ϩʪθߣЇϩʪ
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
ߣ
Plug out and pull the PCB
out of the control box
Check the PCB fuse
ߣ࣒Ãϑߣϑϩ˙Їϑʪʒϑʀͱʪʀϩʪʒ࢐
ߤ࣒Ãϑߤʒ˙Їϑʪʒϑʀͱʪʀϩʪʒ࢐
• 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
ߣ࣒ߥ࣒˵ɇЭʪͱθʪɇϩͱ
Check the power voltage
ߣ࣒Ãϑϩ˵ʪ9UߩߣΧЇϩЭͱϩɇ˝ʪ
ߤߢߢǤɇʀߤߦߢǤɇʀ࢐
• Power cord is fault, Fuse
open, Wrong Power cable
Wiring, AC part is faulty
2) Is the voltage between both
ϩʪθɇͱ˙ÃAߢߤΧ࢈ߣࣛ࢈ߤߣߤǤʒʀ࢐
• Switching Trans of Power
circuit is faulty
3) Is the voltage between both
ϩʪθɇͱ˙ÃAߢߤΧ࢈ߤࣛ࢈ߥߧǤʒʀ࢐
• Power circuit is faulty, Load
short
3
Press the ON/OFF button
ߣ࢏ɇϑΧʪʪʒ࣑˵˝˵࣒
2. Continuous Operation
ߣ࣒Ãϑϩ˵ʪЭͱϩɇ˝ʪͱЭʪθAߣߪߢǤɵʪ˝
imposed on terminal #3-#5 of fan
ͱϩͱθʀͱʪʀϩͱθ࣑AĘߩߤ࣒࢐
• Fan motor of the indoor is
faulty
2) The fan motor of the indoor unit
doesn’t run
• ɇͱϩͱθʀͱʪʀϩͱθ࣑AĘߩߤ࣒
is faulty
3) The power voltage between
terminal #3-#5 of the
ʀͱʪʀϩͱθ࣑AĘߩߤ࣒ϑߢǤ
• PBA is faulty