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9-3 Fault Diagnosis by Symptom
9-3-1 Basic Check Flow
Preparation : multimeter (AC voltage, DC voltage, Resistance)
Short check
for safety
Check point
No Good
• Outdoor unit controller (see 12-3-2)
OK : 207-253V
Detach cable cover of the terminal blocks
(HANDLE CABI RH) on outdoor unit.
Check resistance value between
L and N of Main power terminal block.
Apply the power
Check AC voltage between L and N of
MAIN power terminal block.
Check AC voltage between L and N of
power terminal block for indoor unit.
Is there any display of LED?
START
• Indoor unit controller (see 12-3-3)
OK : over 180KΩ
Power Source
check
No Good
• Power cable (see 12-3-4, 12-2)
• Breaker
OK : 207-253V(50Hz)
No Good
Terminal block wiring
Outdoor unit
No
• Main PCB,
• Display PCB,
• wiring between PCBs.
Yes
No Good
Starting by remocon or ON/OFF switch on the indoor
unit or K2 button on the Outdoor PCB display.
Yes
Error code starts in ''
''
No
Indoor unit
Yes
Consult error code table
Yes
Error code starts in '' ''.
Error code consists of 4 digits and displays first 2
digit and last 2 digit alternatively.
Consult error code table
Wait for 5 minutes to check error
No
• Remote control
• Remote control battery
• Infrared signal receiving path
(front panel duct, infrared receiving module, wiring)
No
• Indoor unit,
• Wiring cable to outdoor unit
Start operation
Any Error code on LED display?
code because some error judgement
needs long time.
Receiving of remote control signal ?
(Check by buzzer sound)
Consult error code(Next Page)
Ok
Check operation ON/OFF by the button
at lower right of the display module
(By buzzer sound and LED display)
Any Error code on LED display?
Wait for 5 minutes to check error code
because some error judgement
needs long time
Check Major parts(See 12-5)
Samsung Electronics 9-12