Applicable Systems
GA Series Compressed Air System
Symptoms
Oil filter differential pressure has exceeded 1.0 bar (14.5 psi), indicating a clogged spin-on filter element. The alarm is triggered by the differential pressure switch across the filter housing.
Possible Causes
- Oil filter element overdue for replacement based on runtime hours
- Degraded oil causing sludge buildup in the filter media (oxidation or contamination)
- Wrong oil viscosity grade used, increasing flow resistance through the filter
Troubleshooting Steps
- Step 1: Check the service timer on the Elektronikon - compare actual hours since last oil filter change
Replace the spin-on filter if hours exceed 2000 or the alarm is active - Step 2: Take an oil sample and inspect for dark color, burnt odor, or metallic particles
If oil is degraded, perform a full oil change with Atlas Copco Roto-Inject Fluid and replace both filter and separator - Step 3: Verify the oil viscosity grade on the drum matches the specification sticker inside the service door
Drain and refill with correct 46-grade synthetic compressor oil if mismatch is found
How to Reset
Reset: Replace the oil filter, then press the Service Reset button on the Elektronikon for the oil filter timer. The differential switch resets automatically when pressure drops.
Common Replacement Parts
- 1613-6169-00: Oil filter element, GA 11-90 (Spin-on, 93 mm OD x 178 mm height)
- 2901-0510-00: Roto-Inject Fluid, 20L drum (ISO VG 46, synthetic PAO/ester blend)
Frequently Asked Questions
- Q: How often should the oil filter be changed?
Every 2000 runtime hours or 12 months, whichever comes first. In dusty environments, reduce to 1500 hours.
- Q: Can I change just the filter without changing the oil?
Yes if the oil passes a visual and odor check. However, the separator element should also be inspected whenever the oil filter is replaced.
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Source: Atlas Copco GA 30-90 Service Manual, 2950 1630 00
Category: Compressor
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