9. TROUBLESHOOTING9-1. Summary of Troubleshooting1. Before troubleshooting1) Require tools/instruments• and screwdrivers, spanners, radio cutting pliers, nippers, push pins for reset switch• Tester, thermometer, pressure gauge, etc.2) Confirmation points before checka) The following operations are normal.1. Compressor does not operate.• Is not 3-minutes delay (3 minutes after compressor OFF)?• Is not the outdoor unit in standby status though the remote controller reached the setuptemperature?• Does not timer operate during fan operation?• Is not an overflow error detected on the indoor unit?2. Outdoor fan does not rotate or air volume changes.• Does not outside low-temperature operation control work in cooling operation?3. ON/OFF operation cannot be performed from remote controller.• Is not the control operation performed from outside/remote side?• Is not automatic address being set up?(When the power is turned on at the first time or when indoor unit address setting is changed, theoperation cannot be performed for maximum approx. 5 minutes after power-ON.)• Is not being carried out a test run by operation of the indoor controller?b) Did you return the cabling to the initial positions?c) Are connecting cables of indoor unit and remote controller correct?2. Troubleshooting procedureWhen a trouble occurred, check the parts along with the following procedure.Trouble → Confirmation of check code display → Check defective position and parts.NOTEFor cause of a trouble, power conditions or malfunction/erroneous diagnosis of microcomputer due to outer noiseis considered except the items to be checked.If there is any noise source, change the cables of the remote controller to shield cables.FILE NO. SVM-19024- 46 -
