Service Manual - Quietside

4-5-15 DC Link Over voltage/ Low voltage error1. Checklist :1) Is the power voltage normal?(Lightning, Power interruption etc.)2) Is AC Power cable connection normal?(Detaching the wire)2. Troubleshooting procedureIs the AC Power cable connection to the outdoorunit terminal block good?NoCheck and reconnecting theAC power cable wireYesIs the connection of reactor terminal good?YesAre the FUSEs on EMI PCB blown?NoYesCheck and reconnecting the reactor wireat the TAB terminalReplace the blown FUSENoPush the center bar of M/C and mesure the resistanceof each contact.Is each contact resistance normal?(less than 0.1ohm)NoExchange M/CYesDoes the error reappear frequentlyYesExchange INVERTER PCBNoThe cause of this error may be power sourcetrouble as like power interruption.Check the power source.4-32 Samsung ElectronicsCH£ª£ª£ªCAV_USA_30520_SM_N.indd 32 2009-2-18 17:33:51