Samsung CH070EAV1 Service Manual page 77

4-6-4 Outdoor Detailed Inspection Procedure
No Procedure
1 Turn OFF the power
and check wire and
socket connection on
each part
2 FUSE check
3
Turn on the power
and check voltage of
terminal block
4 Check LED display on
AIN PCB
5 Check LED display on
INVERTER PCB
6 Check DC voltage of
SMPS output
7 Check INVERTER PCB
8 Check BLDC fan
Samsung Electronics
Inspection Method
Wait until C702-C707 discharged
1) Is connection of housing to socket normal?
2) Is connection of each wire to terminal block normal?
3) Is the reactor wire connection normal?
4) Is there no miss-wiring of each cable?
Is the fuses on each PCB normal?
3 fuese on EMI PCB
1 fuse on MAIN PCB
1 fuse on INVERTER PCB
Is N-R,N-S,N-T around 230Vac?
Is R-S,S-T,T-R around 400Vac?
Is L-N(to indoor unit) around 230Vac?
Is F1-F2 within 5Vdc?
1) Is RED LED ON?
2) Is GREEN LED Blinking once a second?
3) Is LEDs displaying error code pattern?
1) Is RED LED ON?
2) Is GREEN LED Blinking once a second?
3) Is LEDs displaying error code pattern?
MAIN PCB
1) Is voltage of CN51 pin#1-#2 12-14.5V?
2) Is voltage of C108 5V?
INVERTER PCB
3) Is voltage of CN51 pin#1-#2 5V?
4) Is voltage of C124 12V?
5) Is voltage of each ZD100,ZD101,ZD102,ZD103 17-18V?
1) Is resistance of R100 200ohm?
1) To check this, touch one probe to CN10 pin#1(N) and
the other to D101 upper side pin of '~' marking pins
2) Is DC Link voltage 450-510V?
1) Check IGBT module pins marking voltage near C701
1) See 12-2-3 The Outdoor unit Fan error(Fault Diagnosis)
Cause
• installation mistake
• miss assembling
• wire short
• overload
• BLDC FAN short error
• miss wiring of power cable
• wire detaching
• MAIN PCB power trouble
• bad communication between indoor and
outdoor unit
• error detection
• INVERTER PCB power trouble
• NO communication between MAIN and
INVERTER PCB
• error detection
• SMPS circuit trouble
• resister
• wire connection between EMI PCB and
INVERTER PCB
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