Troubleshooting SiBE04-101102 Service Diagnosis4.15 Interrupt Due to OL Action or Thermal Fuse Blow-OutRemote ControllerDisplayE5Outdoor unit LEDDisplayA 5 1 4 2 3 3 4 4 3Method ofMalfunctionDetection OL action detected by the opening of OL contact. Thermal fuse blown out.MalfunctionDecisionConditionsIf an OL action (opening) or thermal fuse blowout signal has come from the OL action or thermal fusedetection circuit to the microcomputer. OL action detected twice, resulting in a shutdown of the system.(The dual-action counter will reset itself if any of the following troubles does not occur for a total oneoperating hour of the compressor since the interruption: OL failure, radiation fin temperature rise, gasshortage, or compressor failure to start.OL setting : Open at 125±3˚CClosed at 95±10˚C Thermal fuse setting: 76˚C (not reusable once blown out)Supposed Causes OL action because of refrigerant shortage OL action because of 4-way valve failure Error detection due to an opening of OL contact Error detection due to connector in poor contact Error detection due to broken OL harness Error detection due to outdoor-unit PC board failure OL action because of mixture of tap water in the field Temperature around the terminal block above 76˚C Thermal fuse blown out due to harness in poor contactSiBE04-101.book Page 102 Monday, October 15, 2001 3:08 PM
