IfPowerIsNotSupplied; IfPowerIsNotSupplied - Samsung RFG298HD Service Manual

TROUBlESHOOTING
4-2-8.Ifcompressordoesnotoperate
Refertotestfunction
in the manual
Didbuzzerofmanualoperationsound?
(Checkcertainlyaftermanualoperation)
0˜800Hz 50%
Duty Signal
output
Replace PCB
Check the wire
disconnection
RefertotheDIODEvoltage
valueintheIPM
Start
Did7mins
passafterCompressor
OFF?
yes
Doescompressor
workwithmanual
operation?
yes
No
No
IsCN75PIN#4
High?(2.5V)
yes
No
Is the wiring
between Main and Sub
normal?
yes
Is the connector
between Main and Sub
normal?
yes
Is the
connector (CN301) of
COMP normal?
yes
Is the DIODE voltage
between Pins for a single
SPM part normal?
yes
IsCOMPASS'y
normal?
yes
Normal
79
No
Checkafter7minutes
yes
Is freezer sensor normal?
yes
Is the temperature sensor
of MAIN PCB normal?
yes
Repair OPEN &
disconnection
No
Checkbadcontactofconnector
No
Checkbadcontactofconnector
No
Replace the INVERTER
PCB ASS`Y
No
ReplaceCOMPASS'y
☞  V oltagecheckingmethodPCBtypicalGround
J23JUMMPERandIC01MICOM#4CN75-"4")
: S quarewavevoltage→2~3Vmeasuredby
multi-meterWhenCOMPoperates
No
Repair OPEN &
disconnection
No
Repair the sensor &
replace PCB
PCBTypicalGroundJ23
JUMMPER