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WA900-3EO
SERVICE INTERVALS
THREE MONTHLY INSPECTION
Component / System
Inspection Required
Condenser coil.
Check refrigeration connections against leakage.
Check coil support bolts.
Condenser fan motor.
Check motor support clamps and screws. Check shaft
bearings and brushes for wear. Check electrical con-
nections.
Condenser fan.
Check for excessive noise during operation. Check for
blade damage. Check securing screws.
Compressor.
Check refrigeration connections against leakage.
Check securing bolts. Check anti vibration mounts.
Check for excessive noise during operation.
Receiver drier.
Check refrigeration connections against leakage.
Check securing bolts. Check for system charge in
sight glass during operation.
High/Low pressure control.
Check electrical connections.
Evaporator coil.
Check for refrigerant leakage. Check coil securing
screws.
Evaporator fan motor.
Check motor support clamps and screws. Check shaft
bearings and brushes for wear. Check electrical con-
nections.
Evaporator fan.
Check for excessive noise during operation. Check for
blade damage. Check securing screws.
Thermal expansion valve.
Check refrigerant connections against leakage.
Thermostat.
Check electrical connections.
Control switches.
Check electrical connections. Check operation.
Supply air louvres.
Check for damage and cleanliness.
Condensate drip tray.
Check for cleanliness. Check for drain pipe blockage.
Main frame and panels.
Unit mounting.
Check securing screws and catches.
Check securing screws. Check plenum seal for leaks.
Refrigeration lines.
Fresh air fan motor.
Check for excessive noise during operation. Check
motor support clamps and screws. Check shaft bear-
ings and brushes for wear. Check electrical connec-
tions.
TWELVE MONTHLY OR 2000 HOURS INSPECTION
Component / System
Inspection Required
Compressor
Check compressor belts for wear, tightness and align-
ment. Replace and adjust as necessary.
Check Oil Level.
Condenser Coil
Hose condenser coil clean being careful not to use
excess pressure, which can damage coil finning.
(More frequent service may be required in dusty
applications.)
Evaporator Coil
Check and if necessary clean.
Performance Test
Carry out full components and system performance
test using a Gauge Manifold Set.
4000 HOURS INSPECTION
Component / System
Inspection Required
Evaporator Coil
Remove evaporator coil and thoroughly clean being
careful not to use excess pressure, which can dam-
age coil finning. Straighten finning.
Receiver Drier
Replace receiver drier. (Indicative only, always
replace receiver drier when the system has been
opened.)
Supply Air Fan
Remove and clean fan assemblies and check for
bearing wear and noise.
Condenser Fans
Remove and clean fan assemblies and check for
bearing wear and noise.
Evaporator Fans
Remove and clean fan assemblies and check for
bearing wear and noise.
Compressor
Check compressor oil level and bearings.
Evaporator Drain Tray
Check for blockage of condensate drains.
OPERATING INSTRUCTIONS
