Troubleshooting SiBE811001EB137 CONVENI-PACK8. Troubleshooting8.1 Symptom-based TroubleshootingNo. Symptom Supposed Cause Countermeasure1 The system does not start operation at all. Blowout of fuse(s) Turn OFF the power supply andthen replace the fuse(s).Cutout of breaker(s) • If the knob of any breaker is inits OFF position, turn ON thepower supply.• If the knob of any circuitbreaker is in its tripped position,do not turn ON the powersupply.Power failure After the power failure is reset,restart the system.2 The system starts operation but makes animmediate stop. Blocked air inlet or outlet of indooror outdoor unit Remove obstacle(s).Clogged air filter(s) Clean the air filter(s).3 The system does not cool or heat air well. Blocked air inlet or outlet of indooror outdoor unit Remove obstacle(s).Clogged air filter(s) Clean the air filter(s).Enclosed outdoor unit(s) Remove the enclosure.Improper set temperature Set the temperature to a properdegree.Airflow rate set to "LOW" Set it to a proper airflow rate.Improper direction of air diffusion Set it to a proper direction.Open window(s) or door(s) Shut it tightly.[In cooling] Direct sunlight received Hang curtains or shades onwindows.[In cooling] Too many persons staying in aroom[In cooling] Too many heat sources (e.g. OAequipment) located in a room4 The system doesnot operate. The system stops andimmediately restarts operation. If the OPERATION lamp on theremote controller turns ON, thesystem will be normal. Thesesymptoms indicate that thesystem is controlled so as not toput unreasonable loads on thesystem.Normal operation. The system willautomatically start operation aftera lapse of 5 minutes.Pressing the TEMP ADJUSTbutton immediately resets thesystem.The remote controller displays"UNDER CENTRALIZEDCONTROL", which blinks for aperiod of several secondswhen the OPERATION buttonis depressed.The system is controlled withcentralized control equipment.Blinking display indicates that thesystem cannot be operated usingthe remote controller.Operate the system using theCOOL/HEAT central remotecontroller.The system stops immediatelyafter turning ON the powersupply.The system is in preparationmode of micro-computeroperation.Wait for a period of approximately1 minute.5 The systemmakesintermittentstops.The remote controller displayserror codes "U4" and "U5", andthe system stops but restartsafter a lapse of severalminutes.The system stops due to aninterruption in communicationbetween units caused byelectrical noises coming fromequipment other than air-conditioners.Remove causes of electricalnoises.If these causes are removed, thesystem will automatically restartoperation.ONKnobTrippedOFFCircuit breaker
