Mitsubishi Electric PUHY-P250YNW-A Service Handbook page 199

8-12-3 Four-way Valve and Check Valve Replacement Procedure ................................................................. 49
8-12-4 Compressor Replacement Procedure................................................................................................... 57
8-12-5 Removal Instructions for the Control Box ............................................................................................. 59
8-12-6 Maintenance Procedure for the Drain Pan............................................................................................ 61
8-12-7 Maintenance Procedures for the Heat Exchanger ................................................................................ 63
8-12-8 Accumulator Replacement Procedure .................................................................................................. 68
8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ..................... 70
8-14 Replacement Instructions for Motor and Bearing (Indoor Unit)..................................................... 71
8-15 Maintenance/Inspection Schedule .................................................................................................... 77
GB_BS_08_C