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Hitachi SRL Series - User Manual

Hitachi SRL Series
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Instruction Manual
SRL-Series
HITACHI OILFREE SCROLL COMPRESSOR
Model  : SRL-7.5M6LL/SRL-7.5M6ML
SRL-7.5M6L
H
/SRL-7.5M6M
H
SRL-11M6LL/SRL-11M6ML
SRL-11M6L
H
/SRL-11M6M
H
SRL-16.5M6LL/SRL-16.5M6ML
SRL-16.5M6L
H
/SRL-16.5M6M
H
CM1E029-00 Jul. 2011
Thank you for the recent purchase of a HITACHI Oilfree Scroll Air Compressor.
Please read this instruction manual carefully for installation, maintenance and
inspection guidelines of the HITACHI Scroll Air Compressor. After reading this
instruction manual, please keep it on hand for future reference.
Pressure Units Clarification
Pressure is indicated in units of
"psig" in this Instruction Manual.
Please review the table below
for the conversion of "psig"
units to "MPa" units.
Unit of pressure
measurement
psig 122 145
MPa 0.84 1.0
Conversion - 1 psig = 0.00689 MPa

Questions and Answers

  • S
    Shannon WallsAug 13, 2025
    Why is my Hitachi Air Compressor generating excessive noise?
    • L
      Laurie ParkAug 13, 2025
      Excessive noise from your Hitachi Air Compressor can stem from several issues: * Improper installation: Ensure the air compressor is installed on level ground. * Loose V-belt: Re-tighten or replace the V-belt.
  • S
    Sarah DixonAug 17, 2025
    How to fix low discharge pressure in my Hitachi Air Compressor?
    • L
      Lynn MichaelAug 17, 2025
      Low discharge pressure in your Hitachi Air Compressor can be caused by: * Leaks in the internal air compressor piping: Re-tighten all air compressor pipe fittings. * Leaking safety relief valve: Replace the safety relief valve. * Clogged or dirty intake air filter: Replace the intake air filter element.
  • H
    heather47Aug 20, 2025
    What to do if my Hitachi SRL electric motor will not run?
    • B
      Brian JohnsonAug 21, 2025
      If the electric motor of your Hitachi Air Compressor won't run, there are several potential causes: * The power supply might be off: Turn on the power supply. * Broken wires: Replace and/or fix the wiring. * Excessive voltage drop due to improper wire thickness: Replace with a properly sized wire. * Damaged power supply panel fuse: Replace the fuse. * Emergency stop switch activated: Reset the emergency stop switch.
  • L
    Luis OsborneAug 25, 2025
    What to do if I see a phase reversal error on my Hitachi Air Compressor?
    • B
      Brittany MendezAug 26, 2025
      If your Hitachi Air Compressor displays a phase reversal error, change two of the three incoming power cables.
  • S
    Shane HesterAug 28, 2025
    What does maintenance alarm mean for my Hitachi SRL Air Compressor?
    • J
      John HoweAug 28, 2025
      This alarm is displayed when the total operating hours exceeds 2,500 hours. Carry out inspection and maintenance of the air compressor.
  • M
    Matthew RiceSep 1, 2025
    What does scroll head maintenance alarm mean for my Hitachi SRL Air Compressor?
    • J
      James PetersenSep 1, 2025
      This alarm is displayed when the total operating hours exceeds 9,500 hours (145PSIG Model : 4,500 hours). Carry out inspection and maintenance of the scroll head.
  • L
    Leslie OsbornSep 4, 2025
    What does overhaul alarm mean for my Hitachi Air Compressor?
    • R
      Rachel HooperSep 5, 2025
      This alarm is displayed when the total operating hours exceeds between 19,000 to 19,500 hours (145PSIG Model : between 9,000 to 9,500 hours). Carry out overhaul of the Scroll Head.
  • C
    Candace LittleSep 9, 2025
    What does upper scroll head maintenance shutdown mean for my Hitachi SRL?
    • B
      bennettsophiaSep 9, 2025
      If the total operating hours exceeds the required maintenance interval, the air compressor ceases operation and this alarm is displayed.

Summary

Safety Precautions

Installation Safety Precautions

Outlines safe practices for installing the air compressor.

Operation Safety Precautions

Details safety measures during compressor operation.

Maintenance and Inspection Safety Precautions

Highlights safety during maintenance tasks.

Daily Operating Components

Installation

Installing the Air Compressor

Instructions on placement, ventilation, and spacing requirements.

Piping the Air Compressor

Connecting air receiver, stop valves, and hoses.

Wiring the Air Compressor

Electrical connection procedures and capacity requirements.

Operation

Prior to Operation

Steps for initial setup, mode selection, and pressure settings.

Maintenance and Inspection

Component Maintenance Schedules

Table outlining inspection and replacement intervals by component.

Troubleshooting

Digital Display Error & Alarm Indications

Lists default error codes shown on the digital display.

Optional Function Error Indications

Lists error codes for optional functions.

Wiring Diagram

Standard Specifications

Hitachi SRL Series Specifications

General IconGeneral
BrandHitachi
ModelSRL Series
CategoryAir Compressor
LanguageEnglish

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