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.
- CP CPA / CPB / CPC rotary screws 5–75 hp
- Early CP QRS series
- CP CPM medical / dental packages
- Load/unload with dual-pressure band
- Weekly timer with 8 events
- Auto-restart after power failure (jumper selectable)
- Service reminders by hours
- RS-485 Modbus RTU
- Digital I/O terminal strip
- Optional Ethernet gateway (ES4000)
- Airend discharge temp (PT100)
- Line pressure (4–20 mA)
- Sump pressure (4–20 mA)
- Motor PTC
- Cooler & fan
- Coolant level & TCV
- PT100 resistance vs table
- Reset overload
- Verify FLA & phase balance
- Test PTC continuity
- Unload setpoint & deadband
- Inlet valve closure
- Check for stuck load solenoid
- Verify 3 phases
- Swap 2 phases for rotation
- Check phase-monitor relay
- Release E-stop
- Check remote loop
- Inspect wiring & polarity
- Test sensor against reference
- Perform correct kit
- Reset only the completed timer
Fault list is non-exhaustive and firmware-dependent. Always confirm against the controller’s on-screen help or OEM manual.
Pin-level resistance and signal values for the sensor types this controller uses. Works offline. De-energise the panel and lift one lead before ohming any element.
- 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
- 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.
Distilled from public OEM manuals and community technician references. Cross-check the on-machine service manual before commissioning.
- Enter key drills into the current menu; up/down scroll; ESC backs out one level.
- Password prompt uses up/down to increment each digit; Enter accepts.
- Reset service timers: Main → Data menu → Service → enter password → select timer → Reset.
- User (operator) — widely published
- 2801
- Reset service timers (public reference)
- 9989
Codes here are widely published in public OEM literature. If a machine has been re-coded at commissioning, these will not work — call the distributor.
- ES4000 Basic vs Advanced share the parameter tree — Advanced adds the graphical trend view and USB export.
- 'Auto restart after voltage failure' is enabled by default from the factory — verify site policy before commissioning in occupied spaces.
- The USB service port is behind the front cover; unit will refuse to log to an unformatted (or NTFS) stick — use FAT32.
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