Ingersoll-Rand RS75i User Manual

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47612267

Revision B

January 2019

Save These Instructions

Contact-Cooled Rotary Screw Air Compressor

Product Maintenance Information

RS45i, RS55i, RS75i

RELEASED 11

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2019 01:43:20 GMT

Table of Contents

Questions and Answers:

A
Antonio ThompsonAug 10, 2025
What to do if my Ingersoll-Rand RS75i Air Compressor will not start?
- B
  brownandrewAug 10, 2025
  If your Ingersoll-Rand Air Compressor won't start, there could be several reasons. First, check that the power supply to the compressor is switched on; if it is, contact a qualified electrician. Another potential cause is controller failure, in which case you should check the supply to the controller and replace it if necessary. Finally, a starter failure could be the issue; in this case, isolate the supply, lock it off, tag it, and replace the failed component, or contact your local Ingersoll Rand representative.
M
Matthew WeaverAug 17, 2025
Why does the pressure produced by my Ingersoll-Rand RS75i is too high?
- B
  bradleymoralesAug 17, 2025
  If the pressure produced by your Ingersoll-Rand Air Compressor is too high because the speed isn't reducing as demand decreases, the controller settings may be incorrect; check and modify them. Alternatively, the pressure transducer may be faulty, incorrectly calibrated, or not receiving a pressure signal; recalibrate or replace it. A drive settings fault could also be the cause, in that case, contact your local Ingersoll Rand representative.
K
Kelli EvansAug 25, 2025
What to do if my Ingersoll-Rand Air Compressor will not meet pressure required by system?
- D
  davidorrAug 25, 2025
  If your Ingersoll-Rand Air Compressor isn't meeting the required system pressure, several factors could be at play. The inlet valve might not be opening fully, the separator element could be dirty or collapsed, pipes or hoses might be blocked or collapsed, or the cooler core could be blocked. Additionally, the minimum pressure check valve might not be functioning correctly, or equipment between the compressor and the customer measuring point could be causing a pressure drop or loss. In each of these cases, repair or replace the faulty component. Review system requirements.
A
April HoSep 2, 2025
What to do if my Ingersoll-Rand Air Compressor is stopped and will not restart?
- W
  William WaltonSep 2, 2025
  If your Ingersoll-Rand Air Compressor is stopped and won't restart, it could be because the controller has tripped the compressor and hasn't been reset. See Table 4. Another possibility is that the emergency stop button has been pressed and not released; in this case, identify the reason why, repair the fault, disengage the button, and reset the controller. Even if the emergency stop button has been pressed and released, the controller may still need to be reset after the fault is repaired.

Ingersoll-Rand RS75i Specifications

General

Model	RS75i
Type	Rotary Screw Air Compressor
Power Output	75 HP
Voltage	460 V
Phase	3
Pressure Range	100 - 175 PSI

Summary

Personnel Qualifications

Required Personnel Skills

Skills include proper tool use, safety procedures, and industry standards.

Safety Precautions

Electrical Isolation and Pressure Relief

Ensure electrical isolation and pressure relief before maintenance.

Genuine Parts and Workmanship

Use genuine parts to avoid safety hazards and performance issues.

Air Compressor Maintenance

Maintenance Prompts and Indicators

Service warnings and flashing LEDs indicate maintenance intervals.

Periodic Maintenance Schedule

Chart detailing maintenance items by time interval.

Routine Maintenance Overview

Covers periodic maintenance and replacement of components.

Coolant Level Check and Addition

Coolant Draining Procedure

Coolant Filter Replacement

Separator Element Check and Replacement

Checking separator differential pressure and replacing the element.

Minimum Pressure Check Valve (MPCV) Testing

Air Cooled Cooler Removal and Installation

Water Cooled Cooler Cleaning

Condensate Drain Check and Cleaning

No-Loss Drain Trap Check and Cleaning

Fluid Monitoring and Bearing Analysis

Recommends predictive maintenance using fluid and shock pulse analysis.

Troubleshooting

Integrated Dryer Maintenance

Dryer Maintenance Schedule

Timed Condensate Drain Cleaning

Electronic Drain Troubleshooting

Basic troubleshooting information for electronic condensate drains.

Integrated Dryer Decommissioning

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