Custom Bid for Services- Removal of 4 no of fresh air return air filter of RMPU cleaning with water and air pressure during each Trip D1 schedule of AC Coach having two RMPU units per coach Cleaning of return air Fresh air grills of coaches with su.., Custom Bid for Services- Cleaning of 04 nos each condenser and evaporator coils with water jet cleaning machine on weekly basis, Custom Bid for Services- Monthly D2 schedule maintenance of underwarranty out of warranty LHB RMPU units In LHB coaches having two RMPU units per coach 1 number 1 coach month, Custom Bid for Services- Six Monthly D3 Schedule Maintenance of underwarranty out of warranty LHB RMPU Units in LHB coaches having two RMPU unitscoach 1number 1 number of schedule, Custom Bid for Services- IOHSS1 Schedule Maintenance of underwarranty out of warranty LHB RMPU Units in LHBcoaches having two RMPU unitscoach once in 18 Month 1number 1 number of schedule