Samsung AQA24C5ME Service Manual

Contents

TroubleshootingSamsung Electronics5-45-2-3 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage normal? (the rating voltage ±10% range)(2) Is the set temperature of the remote control higher than room temperature in COOL mode?(3) Is the set temperature of the remote control lower than room temperature in HEAT mode?(4) Is the POWER IN connector (CN78) linked correctly?(5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(7P)?2) Troubleshooting procedureAfter unplugging out the power cord should be recon-nected within five seconds.Does the operating lamp blinkYESYESNONONONONOYESNOOutdoor unit isout of order.Power relay isout of orderPower relay should bereplaced.Refer to replacePCB modulePCB isout of order.PCB and Room tempera-ture sensor should bechecked.Room temperature sensor isout of orderCheck as in the procedure "No Power parts"Refer to page 5-2.YES@!!! @##Is the room sensor normal register?(25°C 10KΩ)10°C 20°C 30°C17.96k Ω 12.09kΩ 8.3kΩDoes the timer lamp blink during operation ?Is the power relay RY71 operated by adjusting the roomtemperature?Is the rating voltage ±10% range applied relay betweenCN78 ! and # .Test rod location Normal+ - Condition VoltageIC06 Pin #40 GND RY71 ON DC 4.8V