Quincy Power$ync II / III

Quincy branded units built by Atlas Copco after the 2009 acquisition share many Elektronikon-style sensor layouts, but keep OEM-specific fluid (QuinSyn) and separator part numbers.

Manufacturer

Quincy Compressor

Display

Power$ync III: 4.3" color touch; Power$ync II: 4-line LCD.

Years produced

Power$ync II ~2010 – 2018; Power$ync III ~2018 – present.

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, remote-run.

Replaces

Power$ync (original)

Used on

Quincy QGS 5–200
Quincy QSI-series two-stage rotary screw
Quincy QSV variable-speed

On AirCompDX

Quincy Compressor QGS Rotary Screw

Features

Native sequencing up to 8 units
Weekly timer, remote start/stop, dryer control
Trend log and event history

Interfaces

Ethernet Modbus TCP
RS-485 Modbus RTU
USB service port

Sensor inputs

Airend discharge temp
Sump pressure
Line pressure
Fluid filter ΔP
Separator ΔP

Common fault codes

F01 High Airend Discharge Temp Airend outlet > shutdown setpoint.

First checks

Check fluid level & cooler cleanliness
Verify thermal valve opens
Check fan operation

See trigger conditions & affected models →

F05 Separator Element ΔP Separator ΔP high.

First checks

Replace separator element
Change fluid & filter
Inspect scavenge line orifice

See trigger conditions & affected models →

F06 Air Filter ΔP Inlet restriction alarm.

First checks

Replace air filter
Inspect inlet valve

See trigger conditions & affected models →

F09 Motor Overload Main motor overload tripped.

First checks

Reset overload; verify FLA class 20/30
Check voltage & balance
Check for airend drag

See trigger conditions & affected models →

F12 Phase Loss One phase missing on incoming power.

First checks

Verify all 3 phases at disconnect
Inspect contactor & fuses
Check phase monitor

See trigger conditions & affected models →

F15 Discharge Pressure High System over pressure.

First checks

Check unload setpoint & deadband
Verify inlet valve closes

See trigger conditions & affected models →

F20 Emergency Stop E-stop pressed.

First checks

Release E-stop; check remote loop

See trigger conditions & affected models →

F25 Sensor Fault Sensor open / range.

First checks

Check wiring; test sensor against reference

See trigger conditions & affected models →

S1 Service Due Timer-based service reminder.

First checks

Perform service; reset only 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
120 VAC contactor coils typical

Known issues & field notes

Ethernet port can be flaky on early II units — use RS-485 for sequencing where possible

Manuals & literature

Quincy Compressor — manuals index

Public literature library

Direct PDFs

Browse all OEM manual portals →

Your manuals