CP ES3000 / ES4000

ES-series shares hardware architecture with Atlas Copco Elektronikon Mk4 (shared parent). Many sensors and harnesses cross-reference to AC part numbers with a CP label.

Manufacturer

Chicago Pneumatic

Display

ES3000: 2×16 backlit LCD, 6-key membrane. ES4000: 4-line graphic LCD.

Years produced

ES3000 ~2005 – 2015; ES4000 ~2012 – 2020.

Power supply

24 VDC control power, 120/230 VAC input.

Ambient range

0 – 46 °C.

Protection rating

IP54 front.

Relay outputs

Main / star / delta, blowdown, dryer, alarm, load solenoid, remote-run.

Replaced by

CP Air Control / CP Touch

Used on

CP CPA / CPB / CPC rotary screws 5–75 hp
Early CP QRS series
CP CPM medical / dental packages

Features

Load/unload with dual-pressure band
Weekly timer with 8 events
Auto-restart after power failure (jumper selectable)
Service reminders by hours

Interfaces

RS-485 Modbus RTU
Digital I/O terminal strip
Optional Ethernet gateway (ES4000)

Sensor inputs

Airend discharge temp (PT100)
Line pressure (4–20 mA)
Sump pressure (4–20 mA)
Motor PTC

Common fault codes

A01 Airend Discharge Temp High Airend outlet > shutdown (typ. 110 °C).

First checks

Cooler & fan
Coolant level & TCV
PT100 resistance vs table

See trigger conditions & affected models →

A02 Motor Overload Main motor overload trip / PTC.

First checks

Reset overload
Verify FLA & phase balance
Test PTC continuity

See trigger conditions & affected models →

A03 Line Pressure High System pressure > shutdown.

First checks

Unload setpoint & deadband
Inlet valve closure
Check for stuck load solenoid

See trigger conditions & affected models →

A05 Phase Sequence Phase loss or wrong rotation.

First checks

Verify 3 phases
Swap 2 phases for rotation
Check phase-monitor relay

See trigger conditions & affected models →

A07 Emergency Stop E-stop pressed.

First checks

Release E-stop
Check remote loop

See trigger conditions & affected models →

A09 Sensor Fault Sensor open / out-of-range.

First checks

Inspect wiring & polarity
Test sensor against reference

See trigger conditions & affected models →

S1 / S2 Service Due Timer-based service reminder.

First checks

Perform correct kit
Reset only the completed timer

See trigger conditions & affected models →

Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.

Wiring notes

24 VDC control from onboard PSU
Contactor coils typically 24 VDC on smaller frames, 120 VAC on 50 hp+
RS-485 requires 120 Ω termination at each end

Known issues & field notes

ES3000 LCD backlight fades after ~7 years — replaceable as a module
PT100 harness clips at the airend loosen from vibration — a common intermittent shutdown source

Setup / service menu is protected by a 4-digit PIN, default 0000 on ES3000 and 2311 on ES4000 — change on commissioning.

Manuals & literature

Chicago Pneumatic — manuals index

Parts & Services portal

Direct PDFs

Browse all OEM manual portals →

Your manuals