Panasonic CU-4E24RBU Service Manual

Also see for CU-3E19RBU: Operating instructions Service manual Service manual Service manual Installation manual

2TABLE OF CONTENTS PAGE PAGE1. Safety Precautions .............................................32. Specifications .....................................................52.1 CU-3E19RBU ...............................................52.2 CU-4E24RBU ...............................................73. Dimensions .......................................................163.1 CU-3E19RBU .............................................163.2 CU-4E24RBU .............................................164. Refrigeration Cycle Diagram ...........................174.1 CU-3E19RBU .............................................174.2 CU-4E24RBU .............................................185. Block Diagram ..................................................195.1 CU-3E19RBU .............................................195.2 CU-4E24RBU .............................................206. Wiring Connection Diagram ............................216.1 CU-3E19RBU .............................................216.2 CU-4E24RBU .............................................227. Electronic Circuit Diagram ..............................237.1 CU-3E19RBU .............................................237.2 CU-4E24RBU .............................................248. Printed Circuit Board .......................................258.1 Main Printed Circuit Board .........................258.2 Noise Filter Printed Circuit Board ...............278.3 Display Printed Circuit Board .....................289. Installation Information ....................................299.1 CU-3E19RBU .............................................299.2 CU-4E24RBU .............................................3010. Installation Instruction .....................................3110.1 CU-3E19RBU .............................................3110.2 CU-4E24RBU .............................................3611. Operation Control .............................................4111.1 Cooling Operation.......................................4111.2 Heating Operation ......................................4212. Simultaneous Operation Control ....................4313. Protection Control ............................................4413.1 Freeze Prevention control (Cool) ...............4413.2 Dew Prevention control (Cool) ...................4413.3 Electronic Parts Temperature RiseProtection 1 (Cool)......................................4413.4 Electronic Parts Temperature RiseProtection 2 (Cool)......................................4413.5 Cooling overload control (Cool) ..................4513.6 Heating overload control (Heat) .................4513.7 Extreme Low Temperature Compressorlow pressure protection control (Heat) .......4613.8 Deice Control ..............................................4613.9 Time Delay Safety Control(Restart Control) .........................................4613.10 30 seconds Force Operation ......................4613.11 Total Current Control ..................................4613.12 IPM (power transistor) ProtectionControl ........................................................4713.13 Compressor Protection Control(Gas leak detection control 1) ....................4713.14 Compressor Protection Control(Gas leak detection control 2) ....................4713.15 Valve close detection control......................4813.16 Compressor discharge high pressureprotection control ........................................4814. Servicing Mode .................................................4914.1 CU-3E19RBU .............................................4914.2 CU-4E24RBU .............................................5115. Troubleshooting Guide ....................................5315.1 Self Diagnosis Function ..............................5315.2 Self-diagnosis Method ................................5516. Disassembly and Assembly Instructions ......7916.1 Outdoor Unit Removal Procedure(CU-3E19RBU) ...........................................7916.2 Outdoor Unit Removal Procedure(CU-4E24RBU) ...........................................8117. Technical Data ..................................................8417.1 CU-3E19RBU .............................................8417.2 CU-4E24RBU .......................................... 10818. Exploded View and Replacement PartsList .................................................................. 19118.1 CU-3E19RBU .......................................... 19118.2 CU-4E24RBU .......................................... 194