Buildings B

3.2 TimelyMaintenanceSymptoms/PhenomenonPossible CausesSystemAirConditbning/HeatingNot cool enough, not warm • Poor efficiency, leakage ofenoughrefrigerant dust and dirt atheat transmission fins• Noisy, no air movement• Loosen parts, blowers orpropellers breakage• Engines sound normal but noair movement• Dust screens blocked, airducts and grilles needscleaning• Noisy blowers or propellersmovement• Misalignment of motorshafts• Poor indoor air quality• Insufficient fresh air intake,mal-function of intake airfilter• Dripping and substandardoutput of cool or warm air• Insulation failure• Noisy blowers or propellersmovementMisalignment of motorshaftsOther building services installations that require regular checking andmaintenance include gas supply, security system and alarm, radio, telephoneand television signaling systems, etc.(d)Defects in Slopes and Retaining Walls(i)Maintenance responsibi ity ofslopes or soi retaining structureswithin private boundaries restswith the owners. However, itis not uncommon that themaintenance responsibility ofslopes and retaining walls onGovernment land adjoining orin the vicinity of the lot is alsoplaced on the land owners underlease.UNDERSTANDING BUILDINGMAINTENANCE & MANAGEMENT