Mitsubishi Electric PUHY-HP72 Service Handbook page 197

8-11 Measures for Refrigerant Leakage .................................................................................................... 50
8-12 Parts Replacement Instructions ........................................................................................................ 52
8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts)............. 52
8-12-2 Notes on Wiring Installation .................................................................................................................. 53
8-12-3 Four-way Valve and Check Valve Replacement Procedure ................................................................. 54
8-12-4 Compressor Replacement Procedure................................................................................................... 62
8-12-5 Removal Instructions for the Control Box ............................................................................................. 64
8-12-6 Transformer box replacement instructions............................................................................................ 66
8-12-7 Maintenance Procedure for the Drain Pan............................................................................................ 68
8-12-8 Maintenance Procedures for the Heat Exchanger ................................................................................ 70
8-12-9 Accumulator Replacement Procedure .................................................................................................. 77
8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ..................... 79
HWE18240_GB