maintenance of duct air conditioner installed at parishad hall in ujjain municipal corporation , gas refilling with likage attend , follow the mention process below for each compressor : ( without outdoor unit compressor replacement . ) charges etc complete a . vacum the gas line and fill with other required gas as well as required presure . b . leave it & check after at least 24 to 48 hours for likage c . if likage found then close the likage . d . again check the likage e . after the likage attend fill with the proper suitable air conditioner gas . f . after the process if ac outdoor unit compresor is not working or giving performance then report to the sub engineer of the light departmnet . , duct motor rewinding with suitable materila ( old material not return to the department . ) , motor dismental and reinstallation at the duct with blower repairing work . , air flow duct likage repair