Samsung DMR78AHS/XAC Service Manual

Also see for DMR57 Series: User manual Installation guide User manual User manual Installation guide

Contents

4. Troubleshooting4-7Error type Error mode Checking Method Corrective actionsHeater error HE1 1. Check the operation of the Thermistor. - See the “tE1 Error”.2. Check the Heater Relay. - See the “HE Error”.Water leakageerror LE Check whether there is any trace of water leakage in the shutter.Normal: No water leakage trace➢- Faulty: Check the leakage location. Replace the faulty part.- Nomral: Replace the Main PBA assy.Half load error PE1. Check the connections for the Distributor Motor connectors. - Reconnect the Distributor Motor connectors.2. Check whether the coil in Distributor Motor is conductive.: Remove the connectors before measuring.Normal: Approx. 2.6 kΩ➢- Faulty: Replace the Distributor Motor.3. Check whether half load is operating normally.- Check the half load operationNormal: 120V➢- Check the the operation of Distributor Motor Relay.: Check the operating voltage between the white wire of theMain PBA CN1 connector and the violet wire of the CN14connector.Normal: 120V (while operating)➢New PBA3-1.Check whether half load is operating normally.- Check the half load operationNormal: 120V➢- Check the the operation of Distributor Motor Relay.: Check the operating voltage between the white wire of theMain PBA CN101 connector and the violet wire of the CN201connector.Normal: 120V (while operating)➢- Faulty: Replace the Main PBA assy.4. Check the Power Relay. - See the “Power Relay error”.New PBA