Samsung SH18BW6 Service Manual

Also see for AQV18FA: Service manual Service manual

Contents

Samsung Electronics12-3-4 Outdoor Detailed Inspection ProcedureNo Procedure Inspection Method Cause1 Wait 30 seconds over afterdisconnecting the powercable Check the outdoorPCB.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?• Over Current• Inner short of PCB• BLDC FAN Motor Error2 Check the Outdoor unitPCB.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?• Outdoor PCB Error• SUB Relay(RY74) Error• IC05 Error• Indoor PCB Error3 Check the LED lightingafter power supply.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.• Inner short of outdoor PCB• Wrong assembly of outdoor PCB• BLDC FAN Error4 Check the condition ofindoor & outdoor connec-tion cable.1) Is the green LED light on once per second?2) Is the indoor & outdoor connection ableconnected in order?3) Is the grounding wire connected to the both ofindoor & outdoor unit?4) Is the voltage of terminal block N(1), 225V?• Wrong connection of Indoor/Outdoor wiring• Wrong assembly of outdoorcommunication circuit5 Check the Comp Wire. 1) Is it connected red, blue, and yellow in order incounterclockwise.2) Are the valve and its installation condition good?3) Is the installation condition of outdoor unit?• Wrong assembly• Installation condition is bad.6 Check the BLDC Fan. 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 afterpower off?• Outdoor PCB Error• BLDC Motor ErrorTroubleshooting12-21