Samsung SC07AS2 Service Manual

Also see for SC07AS2: Owner's instructions

Contents

TroubleshootingSamsung Electronics226-2-5 When the Outdoor Unit Does Not Operate. (Initial Diagnosis)1. Checklist :1) Is input voltage normal?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 (CN71) linked correctly?5) Is the outdoor unit properly connected with the TERMINAL BLOCK connector(N(1), 1, 2, 3)?2. Troubleshooting procedureAfter unplugging out the power cord should bereconnected within 5 seconds.Does the OPERATION lamp blinkYesNoYesNoNoNoYesYesOutdoor unit isout of order.Power relay isout of orderPower relay should bereplaced.PCB should bechecked.Micom isout of order.Sensor Should bereplacedRoom temperature sensor isout of orderCheck as in the procedure "No Power"Is the room sensor normal resistor?10°C 20°C 30°C17.96kΩ 12.09kΩ 8.3kΩDoes the timer lamp blink during operation ?Is the power relay RY71 operated by adjusting theroom temperature?Is rating voltage ±10% range applied relay betweenTerminal block No. N(1) and No. 1Test rod location Normal+ - Condition VoltageIC4 Pin No.38 GND RY71 ON DC 4.8V#!!@#@NoYes