Fault Diagnosis By Symptom - Samsung MH023FPEA Service Manual

9-3 Fault Diagnosis by Symptom

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