Samsung AQV12NSA Service Manual page 75

Troubleshooting
12-3-4 Outdoor Detailed Inspection Procedure
No Procedure
1 Wait 30 seconds over after
disconnecting the power
cable Check the outdoor
PCB.
2 Check the Outdoor unit
PCB.
3 Check the LED lighting
after power supply.
4 Check the condition of
indoor & outdoor connec-
tion cable.
5 Check the Comp Wire.
6 Check the BLDC Fan.
12-21
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Inspection Method
1) Is C101 discharged?
2) Is the resistance of both terminals of C101 opened?
3) Is the fuse of EMI PCB normal?
4) Is the reactor wire connected?
1) Is R701 200ohm?
2) Does ry74 operate normally?
(IC05 & 16:0V, 1:5V)
3) Is the fuse(F701) normal?
4) Is the Sub PCB assembled normally?
1) Normal: Red: Light On, Green: Flickering,
Yellow: Light Off?
2) Is the voltage of C101 250V over?
3) Is the input of IC19 8V, and the output 5V?
4) Recheck after disassembling BLDC FAN Wire.
1) Is the green LED light on once per second?
2) Is the indoor & outdoor connection able
connected in order?
3) Is the grounding wire connected to the both of
indoor & outdoor unit?
4) Is the voltage of terminal block N(1), 225V?
1) Is it connected red, blue, and yellow in order in
counterclockwise.
2) Are the valve and its installation condition good?
3) Is the installation condition of outdoor unit?
1) Is CN01 1, 3 over 250V?
2) Is CN01 3, 5 within 1V~5V?
3) Is the voltage of CN01 6 changed?
4) Is the resistance of BLDC Motor 1, 3 opened after
power off?
Cause
•
Over Current
•
Inner short of PCB
•
BLDC FAN Motor Error
• Outdoor PCB Error
• SUB Relay(RY74) Error
• IC05 Error
• Indoor PCB Error
•
Inner short of outdoor PCB
•
Wrong assembly of outdoor PCB
•
BLDC FAN Error
•
Wrong connection of Indoor/Outdoor wiring
•
Wrong assembly of outdoor
communication circuit
•
Wrong assembly
•
Installation condition is bad.
•
Outdoor PCB Error
•
BLDC Motor Error
Samsung Electronics