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6 - MAINTENANCE CHECKLIST
6.1 - Checklist for check points and maintenance intervals
The checklist contains a general overview of the planning that facilitates the inspections and maintenance of the AHU.
On the following pages there is a more detailed description of the individual components.
Remember to de-energies all components and to ensure that the fan has stopped rotating, before the doors
and access covers are opened before inspections and maintenance take place.
General AHU Maintenance Check List
Components
Panels
CASING
Doors
Actuator
DAMPER
Blades
Rotation
Flat Pre-filter
FILTER
Metallic filter
Vee filter
Bag filter
Control
ELECTRIC
HEATER
Fins
COIL
Coil Frames
Headers
Eliminators
Drain pan
Fan housing
FAN
Bearing
Blower
Motor
Drive (Pulleys
& Belts)
Isolators
Flexible
connection
Rotor
HEAT
WHEEL
Motor and
Drive
Check Points
Contamination
Damage
Operation of Hinges & Locks
Door Seals
Installation
Seal and contamination
Fitting
Opening
Bushing and Linkage
Operational
Physical condition and seal
pressure drop
All electrical connection
Flow and thermostat sensor
Contamination
Damage
Air by-pass
Seal
Water leakage
Contamination
Contamination
Water Flooding
Contamination
Lubrication (re-grease type)
Wear
Contamination
Lubrication (re-grease type)
Fitting
Belt tensioning
Wear
Alignment
Fixing
Contamination
Crack and leak
Contamination
Operational
Operational
Wear and tear
Recommended Maintenance Operations
Remove contamination with water and mild house hold
soap
Remove rust and touch-up with anti-rust primer and
paint
Check locks and hinges operational function
Check for seal span and crack
Check if correctly installed to the damper shaft
Check seal integrity, remove dirt with compressed air
Check blades and rod bolts are tight
Check if blades can open and close to require angle
Remove dirt from bushing and linkage rod with
compressed air
Check damper operational once power supply restored
Check filter sitting (rail) correctly each other.
Check filter clip (frame) correctly installed.
Check and remove pollution and dirt
Filter replacement depend to degree of contamination
Clean dirt with compressed air and check connection in
control box
Check the operational of flow and thermostat sensors
Clean dirt with compressed air
Check fin alignment and comb fins
Check gap and seal with silicon sealant to avoid fresh air
by-pass
Check gap and seal with silicon sealant to avoid fresh air
by-pass
Incase tube leak, braze leak point
Clean dirt with compressed air
Clean dirt with vacuum cleaner
Check and clean U-trap
Check and remove dirt with compressed air
Check oil and re-grease every 6 months.
Check if physical bearing is good or replace with new
bearing
Check and remove dirt with compressed air
Check oil and re-grease every 6 months.
Weekly check pulley fitting tightness to the shaft
Weekly check tensioning and tighten the belt if required
Check if belt in good condition or replace with good belts
Weekly check pulley and belt alignment
Check all bolts not loose, tighten the bolts if required
For spring isolators, check if rusted and touch-up with
anti-rust
Check if any damage or air leakage, replace new flexible
connector if required
Check and remove dirt with compressed air
Check rotor rotation
Check rotor speed and verify with design rpm
Check if belts with enough tension
12
Interval Month
1
3
6
12
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