M thermal Mono 
202004                                                                                                                                                                                                                    31 
Part 4 
Diagnosis and 
Troubleshooting 
 
1 Outdoor Unit Electric Control Box Layout ................................................. 32 
2 Outdoor Unit PCBs ................................................................................... 35 
3 Error Code Table ....................................................................................... 49 
4 Troubleshooting ....................................................................................... 52 
5 Appendix to Part 4 ................................................................................. 108