Panasonic CU-5E36QBU-5 Service Manual

Also see for CU-5E36QBU-5: Operating instructions

5615.2.4 H16 (Outdoor Current Transformer (CT) Abnormality)Malfunction Decision Conditions A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) andCT detected input current (less than 1.25A) for continuously 20 seconds.Malfunction Caused CT defective. Outdoor PCB defective. Compressor defective (low compression).Abnormality Judgment: ---TroubleshootingForce cooling operation and measure:1. Running current2. Suction pressureReplace compressor due tocompressor low compression.YesNo Replace the indoor andoutdoor unit PCBs.Check the functionality ofcurrent transformer (CT).Replace the outdoor PCB.YesIs the CT open circuit?NoIs the running current less than1.25A?For safety reason and to prevent componentbreakdown, always switch off the power beforeremove and connect the component.Caution