Ingersoll-Rand ARO EVO Series

Questions and Answers

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Ashley BartlettAug 20, 2025
Why my Ingersoll-Rand Water Pump will not operate?
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  Dennis MooreAug 20, 2025
  If your Ingersoll-Rand Water Pump is not operating, it could be due to several reasons: * Improper power, sensor, or control wiring. Ensure wiring is done according to the manual's instructions. * The Smart Setup wasn't completed at VFD startup. Complete the Smart Setup in the Quick Menu, Selection §4. * A VFD Alarm. Check the VFD manual section 7.4 for a list of alarm codes. * The torque limit is set too low. Increase VFD parameter 4-16, but do not exceed 100%. * Crankshaft bearing failure. Replace the pump crankcase.
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Cynthia AyersAug 22, 2025
What to do if my Ingersoll-Rand ARO EVO has erratic behavior or excessive noise?
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  Michael PerryAug 22, 2025
  If your Ingersoll-Rand Water Pump is experiencing erratic behavior, excessive noise, or knocking, it could be due to: * Excessive wear of the wrist pin and/or journal. Consider replacing the wrist pin and journal. * Excessive wear of the piston rider band and/or wear ring. Replace the rider band and/or journal. * A missing, worn, or failed ball check. Ensure all ball checks are installed, intact, and in place. * The system operating outside of NPSH requirements. Ensure the pump is running within NPSH requirements. * A foreign particle stuck in the inlet manifold or ball check. Make sure no solid particles exceed the pump's passing capability.
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Charles HughesAug 25, 2025
What to do if my Ingersoll-Rand ARO EVO Water Pump will not achieve pressure?
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  Yvonne GrayAug 25, 2025
  If your Ingersoll-Rand Water Pump will not achieve pressure, check the following: * Missing, worn, or failed ball checks: Ensure all ball checks are installed, intact, and in place. * Damage or failure of the PRV bellows: Replace the PRV bellows. * Torque limit set too low: Increase VFD parameter 4-16, but do not exceed 100%.
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Patricia HenryAug 26, 2025
What to do if my Ingersoll-Rand Water Pump will not achieve flow?
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  William KennedyAug 27, 2025
  If your Ingersoll-Rand Water Pump is not achieving the desired flow rate, consider the following: * Missing, worn, or failed ball check: Ensure all ball checks are installed, intact, and in place. * Excessive back pressure: Increase VFD parameter 4-16, not exceeding 100%, or decrease the system back pressure.
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richardgonzalezAug 28, 2025
Why does the oil color turn black in my Ingersoll-Rand ARO EVO Water Pump?
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  Kendra ThomasAug 28, 2025
  If the oil color in your Ingersoll-Rand Water Pump turns black, it could be caused by: * A malfunctioning piston pump assembly. Bleed air from the NPT plug on the top right side of the oil pump housing. * A broken or damaged crankshaft cam. Replace the crankshaft cam. * The oil filter element needing replacement and is in bypass mode. Replace the oil and filter.
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Heather StevensonAug 30, 2025
Why is the speed oscillating on my Ingersoll-Rand Water Pump?
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  Lauren AyersAug 30, 2025
  If your Ingersoll-Rand Water Pump speed is oscillating, it could be due to: * Varying back pressure in the system causing the pump to go in and out of torque limit. If constant speed is desired, increase VFD parameter 4-16, but do not exceed 100%. * Leak detects tripping and beginning to stop the pump, but the sensor loses contact with fluid before the pump comes to a full stop and returns to commanded speed. Ensure air caps and tubing are sufficiently cleaned after a diaphragm failure. Increase the filter timer on leak detect sensitivity if nuisance trips cannot be avoided.
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pamelahurleySep 1, 2025
What causes pre-mature diaphragm failure in my Ingersoll-Rand ARO EVO?
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  Keith AndrewsSep 1, 2025
  If you are experiencing pre-mature diaphragm failure in your Ingersoll-Rand Water Pump, it could be due to fluid cap bolts or diaphragm bolts loosening, allowing air in between the diaphragms. Use recommended torques for all fasteners and re-torque all fluid section bolts prior to operation.
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melanie44Sep 3, 2025
What causes PRV bellows failure in my Ingersoll-Rand ARO EVO?
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  diana90Sep 3, 2025
  If you're experiencing PRV bellows failure in your Ingersoll-Rand Water Pump, consider these potential causes: * Excessive and repeated rapid dead-heading (rapid valve closure). Dead-head (down-stream valve closure) should be done in a smooth and controlled manner. * Using the pump PRV to maintain system pressure spikes or shocks. The pump PRV does not replace the need for system safety or relief devices. Install system protection.
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Timothy HoldenSep 5, 2025
What causes rubber bellows failure in my Ingersoll-Rand ARO EVO?
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  Michael GarnerSep 5, 2025
  If you're experiencing rubber bellows failure in your Ingersoll-Rand Water Pump, it could be due to: * Bellows not replaced with each diaphragm change. Replace rubber bellows with each diaphragm replacement. * Excessive oil leak at the piston seal limits breathing of the rubber bellows and can collect in the bellows. Replace piston seals and any damaged pistons.
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James RodriguezSep 7, 2025
Why is there excessive oil in section 1 of the lower cap of my Ingersoll-Rand ARO EVO?
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  Jared ObrienSep 7, 2025
  If you notice excessive oil in section “1” of the lower cap of your Ingersoll-Rand Water Pump (as shown in figure 1), it could be due to: * Worn or damaged reciprocating piston seals. Replace the piston seal. * A worn, scratched, or damaged piston sealing surface. Replace the piston and seal. * Excessive wear of the piston wear ring or rider band. Replace the wear ring and rider band.

Summary

Technical Specifications

Pump Data

Detailed specifications for the electric diaphragm pump, including model variations and physical characteristics.

Variable Frequency Drive (VFD) Data

Technical specifications for the Variable Frequency Drive (VFD) unit, covering power, voltage, and environmental ratings.

Electric Motor Data

Technical specifications for both ordinary and hazardous location electric motors used with the pump.

Nameplate Details

Information on standard and hazardous nameplate details, explaining key data fields for pump identification.

Model Description Chart

Model Code Explanation

Explanation of the model code structure to identify pump configuration, wetted parts, motor, and VFD options.

Encoder Cable Assembly for Ordinary Motors

Details on encoder cable assemblies for ordinary location motors, including part numbers and availability.

Operating and Safety Precautions

General Description

Introduction

Overview of the EVO Series electric diaphragm pump, highlighting its features and operating principle.

Storage

Guidelines for proper storage of the pump equipment to prevent damage and maintain condition.

Unpacking

Instructions for unpacking the pump, including visual inspection for shipping damage.

Mechanical Installation

Pump and Motor Installation

Step-by-step instructions for installing the pump and its motor, emphasizing safety and proper alignment.

Pump and Gearbox Breather Installation

Procedures for installing the breather components on the pump crankcase and gearbox.

VFD Mechanical installation

Guidance on the mechanical mounting and installation of the Variable Frequency Drive (VFD).

Electrical Installation for Ordinary Locations

VFD-Wiring Diagram

Schematic diagram illustrating the VFD wiring connections for ordinary locations.

General Wiring Practice for VFD

Best practices and recommendations for wiring VFDs, including cable management and grounding.

VFD AC Mains - Input Power Requirements

Required AC mains input power specifications and voltage/frequency compatibility for the VFD.

Power Wiring

Instructions for connecting power wiring to the VFD and motor, including cable sizing and gland selection.

VFD - Input Power Wiring

Detailed steps for wiring the VFD's AC input power, including cable cross-sections and grounding.

VFD - Output Motor Wiring

Guidelines for wiring the VFD output to the motor, emphasizing shielded cables and proper connections.

Motor - Input Power Wiring

Instructions for wiring the motor's input power, including connection types and cable gland selection.

Control Wiring (Required)

Required control wiring procedures for the pump system, including essential safety features.

Leak detector wiring diagram

Wiring diagram for the leak detection system, showing sensor connections to the VFD for fault detection.

Thermal protection - Ordinary motor

Wiring instructions for thermal protection sensors in ordinary location motors to the VFD.

Encoder Wiring - Ordinary Motor

Guide for wiring the motor's encoder to the VFD for speed feedback and control.

Control Wiring (Recommended)

Recommended control wiring practices, including the installation of an emergency stop.

Safe stop wiring diagram

Wiring diagram for implementing a safe stop function using an external emergency stop switch.

Control Wiring (Optional)

Optional control wiring configurations for enhanced pump operation and monitoring.

Digital start;stop control

Configuration for digital inputs to control pump start/stop and reset functions via the VFD.

Analog Input - Speed control

How to use analog signals (0-10V or 4-20mA) to control pump speed via VFD settings.

Analog Inputs - Torque (Pressure) Control

Using analog signals to control the VFD's torque limit, thereby regulating pump pressure.

Additional available Input;output (Optional)

Optional configuration of additional digital and analog inputs/outputs for advanced control.

Configured Input; Output Summary - Ordinary

Summary table of configured inputs and outputs for ordinary location setups.

VFD serial communication

Setup instructions for RS485 serial communication using Modbus RTU protocol.

User defined readout

Customizing the VFD display to show specific pump parameters like RPM or flow rate.

Electrical Installation for Hazardous Locations

General Wiring

General wiring requirements and safety considerations for electrical installations in hazardous environments.

Power Wiring

Guidance on power wiring for VFDs and motors in hazardous locations, including cable gland selection.

Control Wiring (Required)

Essential control wiring procedures and safety measures for hazardous duty applications.

Leak Detector Wiring

Wiring the leak detection system for hazardous areas, including Zener barrier requirements.

Thermal Protection - Hazardous Motor

Connecting PTC thermal sensors from hazardous motors to the VFD via a thermistor card.

Encoder Wiring - Hazardous Motor

Wiring the encoder for hazardous duty motors, ensuring correct connections to the VFD encoder card.

Control Wiring (Optional)

Optional control wiring configurations for hazardous duty pumps, enhancing operational flexibility.

Configured Input;Output Summary - Hazardous

Summary of configured inputs and outputs for hazardous location pump installations.

VFD Serial Communication - Hazardous

Setting up serial communication for hazardous VFDs, supporting Modbus RTU protocol.

Grounding

Pump Grounding

Procedure for grounding the pump housing to ensure electrical safety and prevent static discharge.

VFD Grounding

Correct grounding methods for the Variable Frequency Drive (VFD) to prevent leakage current hazards.

Electric Motor Grounding

Requirements for grounding the electric motor to the controller for worker protection and system integrity.

Operation

Pre Operation Checklist

Essential checks to perform before initial operation of the pump and VFD system.

Personal Menu Settings

Configuration of VFD personal menu settings for language, display, and operational parameters.

VFD Smart Setup

Guide to the VFD's automatic setup program for configuring motor and language settings.

Maintenance

Service Kits

Information on available service kits for different pump sections and maintenance needs.

Troubleshooting

Reset VFD to Factory Default Settings

Procedure for resetting the VFD to its factory default settings when troubleshooting issues.

Dimensional Data

Pump With Motor

Dimensional drawings and measurements for the pump assembly including the motor.

Variable Frequency Drive (VFD)

Dimensional drawings and specifications for the VFD (A5 Frame Size).

Performance Curve

Certification

Certification Standards and Markings

Overview of certification standards and markings applicable to the pump and its components.

Specific Conditions of Use

Specific installation and usage conditions required for equipment operating in explosive atmospheres.

Warranty Declaration