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Troubleshooting - Sealey SAC32775B Quick Start Manual

270l belt drive air compressor 7.5hp 3ph

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6.4.
OPERATIONS TO BE CARRIED OUT EVERY 100 HOURS
NOTE: Or more frequently, if the compressor operates in a very dusty atmosphere.
A: Check oil level and, if necessary, top up.
B: Remove the fi lter elements (fi g 3) and clean with compressed air (wear eye protection). DO NOT operate the compressor
without the fi lters as foreign bodies or dust could seriously damage the pump.
C: Check for oil leaks.
6.5.
OPERATIONS TO BE CARRIED OUT EVERY 200 HOURS:
A: Replace the lubricating oil. For oil specifi cations see 6.7.
Remove the fi ller cap (fi g 5) then unscrew the drain plug (fi g 5) and drain the oil into a suitable waste oil container.
Drain when the compressor is hot so that oil drains rapidly and completely. Incline compressor to ensure complete drainage.
Replace drain plug and refi ll through the oil fi ller aperture. DO NOT overfi ll. Replace fi ller cap.
B: Check the automatic cut-out at maximum pressure and the automatic cut-in at 2bar below.
WARNING! Never mix diff erent oils and DO NOT use non-detergent/low quality oils as the compressor may be damaged.
WARNING! Dispose of waste oil only in accordance with local authority requirements.
6.6.
OPERATIONS TO BE CARRIED OUT EVERY 500 HOURS:
A: Replace air fi lter (fi gs 3 & 5).
B: Check all tube fi ttings and electrical connections.
6.7.
OIL
Recommended oil for compressors, suitable for room temperatures ranging from +5°C to +25°C.
SEALEY CPO or equivalent SAE 40 compressor oil. Room temperature below +5°C: SAE 20 compressor oil.
IMPORTANT WARNING - Air contaminants taken into the compressor will aff ect optimum performance. Example: Body fi ller dust
or paint overspray will clog the pump intake fi lter and may cause internal damage to pump/motor components.
WARNING! Any parts damaged by any type of contamination will not be covered by warranty.
6.8.
Inspection of pressure tank both inside and out.
Under the PRESSURE SYSTEMS SAFETY REGULATIONS 2000 it is the responsibility of the owner of the compressor to initiate a
system of inspection that both defines the frequency of the inspection and appoints a person who has specific responsibility for
carrying out the inspection.

7. TROUBLESHOOTING

FAULT
1A) Pressure drop in the tank
1B) Pressure drop in the tank
1C) Pressure drop in the tank
2) Pressure switch valve leaks when
compressor is idle
3) Air leaks from tank body or tank welds
4A) Motor stops and will not restart
4B) Motor stops and will not restart
5) Compressor stops and does not restart
6A) Compressor does not stop at
maximum pressure
6B) Compressor does not stop at
maximum pressure
7) Compressor noisy with metallic knock
8) Excessive moisture in discharged air
© Jack Sealey Limited
POSSIBLE CAUSE
Air leaks at connections
Air leaks from safety valve
Air leaks from cylinder head gasket
Non-return valve seal defective
Internal corrosion caused by infrequent tank
draining or non permitted modifications to tank
Thermal cut out has operated
Supply fuse has tripped
Motor failure
Pressure switch fault
Filter clogged
Head gasket or valve fault
Bearing or piston damage
High humidity environment
Original Language Version
REMEDY
Run compressor to maximum pressure, switch off.
Brush soap solution over connections and look for
bubbles. Tighten connections showing leaks.
If problem persists contact Authorised Service Agent
It should be replaced, unless leaking at a joint
which can be sealed.
Check tightness of head bolts. If leak continues
contact authorised Service Agent
Empty the air tank. Remove the check valve cap,
spring and seal. Clean the seal and its seat, or if
necessary replace the seal (fig 5)
Tank could rupture or explode. Cannot be repaired
DISCONTINUE USE IMMEDIATELY
Allow unit to cool for 30 minutes before restarting
Press trip reset button (fig 6) and restart unit. If
repeated tripping occurs replace the check valve or
contact authorised Service Agent
Contact Authorised Service Agent
Contact Authorised Service Agent
Replace filter element.
Contact Authorised Service Agent
Contact Authorised Service Agent
Drain tank after each use
SAC32775B Issue 1 31/03/22

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