Compressor Fault Codes
Look up fault codes for industrial air compressors — rotary screw, recip, and centrifugal — across Atlas Copco, Sullair, Ingersoll Rand, Kaeser, Gardner Denver, Quincy, and more.
Coverage
509codes
9 controllers across 9 brands
Filter by brand / controller
Browsing all 509 codes · page 1 of 11
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1101 — Twin Unit Missing
Communication with the paired twin-unit controller is lost.
Likely Causes
- CAN/communication cable disconnected
- Twin unit powered off
- Controller board failure
First Checks
- Check CAN bus wiring between units
- Verify twin unit power and status
- Inspect controller connectors
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1102 — Twin Unit Alarm Active
An active alarm exists on the paired twin unit.
Likely Causes
- Fault on twin unit
- Sensor failure on twin unit
- Communication issue
First Checks
- View alarm log on twin unit display
- Clear underlying fault on twin unit
- Check wiring between controllers
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1103 — Twin Unit Stopped Alarm
The paired twin unit has stopped unexpectedly.
Likely Causes
- Fault shutdown on twin unit
- E-stop pressed on twin unit
- Power loss to twin unit
First Checks
- Check twin unit display for fault message
- Verify twin unit power
- Reset fault on twin unit
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1156 — Breaker Fault
Main circuit breaker has tripped or is in fault state.
Likely Causes
- Motor overload
- Short circuit in power wiring
- Breaker failure or mis-trip
First Checks
- Check breaker for trip condition
- Inspect motor for overload cause
- Verify wiring integrity
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1157 — OilXpert Homing Fault
OilXpert automatic oil-level actuator failed to complete its homing sequence.
Likely Causes
- Actuator mechanical obstruction
- Actuator motor failure
- Position sensor failure
First Checks
- Check OilXpert actuator for mechanical binding
- Inspect sensor wiring
- Contact Atlas Copco service
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1158 — AirXpert Homing Fault
AirXpert inlet valve actuator failed to complete its homing sequence.
Likely Causes
- Inlet valve actuator sticking
- Position sensor failure
- Actuator motor fault
First Checks
- Check inlet valve for mechanical freedom
- Verify actuator wiring and power
- Inspect position sensor
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
1159 — Breaker Status
Breaker status input indicates an unexpected open condition.
Likely Causes
- Breaker auxiliary contact fault
- Wiring to controller broken
- Intermittent contact
First Checks
- Check auxiliary contact on breaker
- Verify wiring from breaker to controller
- Test contact continuity
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
2000 — Emergency Stop
Emergency stop pushbutton activated or reference voltage to E-stop input is missing.
Likely Causes
- E-stop button physically pressed
- E-stop wiring open/broken
- Controller missing reference voltage
First Checks
- Check if E-stop button is pulled out/reset
- Inspect E-stop circuit wiring
- Verify 24 V reference voltage at E-stop input
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
2005 — Immediate Stop
Compressor received an immediate stop command (no ramp-down).
Likely Causes
- Remote stop input activated
- Sequence controller issued stop
- Control wiring fault
First Checks
- Check remote-start/stop wiring
- Verify sequence controller commands
- Inspect digital input wiring
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3050 — Vessel Pressure High Warning
Separator vessel pressure exceeded first warning threshold.
Likely Causes
- Downstream demand dropped suddenly
- Pressure setpoint incorrect
- Inlet valve not unloading properly
First Checks
- Verify pressure setpoints in controller
- Check inlet valve operation
- Inspect downstream piping for blockage
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3060 — Vessel Pressure High Shutdown
Separator vessel pressure exceeded shutdown threshold.
Likely Causes
- Inlet valve failed to close on unload
- Pressure transducer failure
- Safety valve seat leaking
- Pressure setpoint too low
First Checks
- Check inlet valve / solenoid operation
- Verify pressure transducer reading accuracy
- Inspect safety relief valve
- Review setpoint settings
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3080 — Vessel Pressure Sensor Circuit
Pressure transducer signal is out of range (open/short circuit).
Likely Causes
- Sensor wiring open or shorted
- Transducer failed
- Connector corrosion
First Checks
- Check transducer wiring continuity
- Measure transducer output (4–20 mA)
- Replace transducer if out of range
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3100 — Regulating Pressure Alarm 1
Network/working pressure has fallen below the first alarm threshold.
Likely Causes
- Excessive air demand
- Air leak in distribution system
- Inlet valve not fully opening
First Checks
- Check air demand vs compressor capacity
- Inspect piping for leaks
- Verify inlet valve operation
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3110 — Regulating Pressure Alarm 2
Network/working pressure alarm 2 — second threshold exceeded.
Likely Causes
- Persistent high demand
- Multiple compressors offline
- Pressure setpoint misconfigured
First Checks
- Verify number of running compressors
- Review pressure setpoints
- Check for large air leaks
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3130 — Regulating Pressure Sensor Circuit
Regulating pressure transducer signal is out of valid range.
Likely Causes
- Transducer wiring fault
- Transducer failure
- Connector issue
First Checks
- Check transducer wiring
- Measure 4–20 mA signal
- Replace transducer if faulty
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3150 — Air Discharge Pressure Alarm 1
Compressor air discharge pressure exceeded first alarm level.
Likely Causes
- Blocked downstream network
- Pressure setpoint too high
- Minimum pressure valve stuck closed
First Checks
- Check downstream isolation valves
- Review discharge pressure setpoints
- Inspect min. pressure valve operation
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3160 — Air Discharge Pressure Alarm 2
Compressor air discharge pressure exceeded second (higher) alarm level.
Likely Causes
- Downstream blockage
- Inlet valve not unloading
- Safety valve set too high
First Checks
- Check for blockage in discharge piping
- Test inlet valve unload function
- Verify safety valve setting
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3170 — Air Discharge Pressure Circuit
Discharge pressure transducer circuit fault (open/short).
Likely Causes
- Sensor wiring break
- Transducer short circuit
- Connector failure
First Checks
- Inspect wiring from transducer to controller
- Check connector pins for corrosion
- Test transducer signal
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3200 — Oil Level Alarm 1
Oil level in the separator tank has dropped to the first warning threshold.
Likely Causes
- Oil consumption higher than normal
- Oil leak in system
- Separator element saturated
First Checks
- Check oil level sight glass
- Inspect for external oil leaks
- Check separator element delta-pressure
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3210 — Oil Level Alarm 2
Oil level critically low — at or near minimum acceptable level.
Likely Causes
- Significant oil leak
- Separator element failure
- Extended operation without oil checks
First Checks
- Immediately check oil level and add oil if safe
- Inspect for major oil leaks
- Check separator element condition
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3220 — Oil Level Sensor Circuit
Oil level sensor signal is out of range.
Likely Causes
- Sensor wiring open
- Sensor failed
- Connector corrosion in oil environment
First Checks
- Inspect sensor wiring
- Test sensor resistance/signal
- Replace sensor if indicated
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3250 — Pressure Dewpoint Alarm 1
Pressure dewpoint sensor reading exceeded first warning limit.
Likely Causes
- Dryer not functioning optimally
- High inlet humidity
- Dryer undersized for current load
First Checks
- Check dryer operation and refrigerant level
- Verify inlet air conditions
- Clean dryer coils
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3450 — Battery Low Alarm
Controller backup battery voltage is low.
Likely Causes
- Battery end of life
- Battery discharge
- Controller board fault
First Checks
- Replace controller backup battery
- Check battery holder for corrosion
- Verify controller firmware date/time settings
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3460 — Battery High Alarm
Battery voltage detected above normal range.
Likely Causes
- External voltage source on battery circuit
- Controller board fault
- Incorrect battery type installed
First Checks
- Check battery type vs specification
- Inspect for external voltage on battery circuit
- Contact Atlas Copco service
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3500 — Interstage Pressure 1 Alarm 1
Interstage pressure (between LP and HP stages) is outside normal range — first alarm.
Likely Causes
- HP element restriction
- Interstage pipe leak
- LP element capacity issue
First Checks
- Check HP inlet valves and cooling
- Inspect interstage piping for leaks
- Review LP element condition
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
3510 — Interstage Pressure 1 Alarm 2
Interstage pressure exceeded second (higher) alarm threshold.
Likely Causes
- Blocked HP inlet
- Interstage cooler fouled
- HP element failure
First Checks
- Check HP element and valves
- Clean interstage cooler
- Verify interstage pressure transducer
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4000 — LP Element Temperature Alarm 1
Low-pressure element outlet temperature is approaching the warning limit.
Likely Causes
- Fouled oil cooler
- Low oil level
- High ambient temperature
- Failed thermostatic valve
First Checks
- Check oil cooler fin condition
- Verify oil level
- Check ambient temperature
- Test thermostatic valve
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4010 — LP Element Temperature Alarm 2
Low-pressure element temperature has reached second warning level.
Likely Causes
- Severely fouled cooler
- Thermostatic valve stuck closed
- Oil circulation restriction
First Checks
- Clean oil cooler immediately
- Test thermostatic valve bypass function
- Check oil filter delta pressure
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4020 — LP Element Temperature Alarm 3 (Shutdown)
LP element temperature exceeded shutdown limit — compressor stops to prevent overheating damage.
Likely Causes
- Completely fouled oil cooler
- Thermostatic valve failure
- Extremely high ambient temperature
- Oil starvation
First Checks
- Clean oil cooler and fan
- Replace thermostatic valve if failed
- Verify ambient temperature within spec
- Check oil level and quality
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4040 — LP Element Temperature Sensor Circuit
LP element temperature sensor wiring is monitored for short-circuit and wire break.
Likely Causes
- Sensor wiring break
- Sensor shorted
- Connector corrosion near airend
First Checks
- Check sensor wiring for damage
- Test resistance of sensor per chart
- Replace sensor if out of range
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4050 — Ambient Temperature Alarm 1
Ambient temperature around the compressor is above the first warning threshold.
Likely Causes
- Inadequate ventilation of compressor room
- Hot air recirculation
- Summer peak conditions
First Checks
- Check air inlets and outlets are clear
- Verify room ventilation fan operation
- Measure ambient vs compressor spec
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4060 — Ambient Temperature Alarm 2
Ambient temperature exceeded second warning/shutdown threshold.
Likely Causes
- Room ventilation failure
- Blocked compressor air inlet
- Extreme outdoor temperature
First Checks
- Verify ventilation louvers are open
- Clear any blockage around compressor
- Add supplemental ventilation if needed
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4070 — Ambient Temperature Sensor Circuit
Ambient temperature sensor circuit is open or shorted.
Likely Causes
- Sensor wiring damage
- Sensor failure
- Connector loose
First Checks
- Check sensor wiring continuity
- Measure sensor resistance
- Replace if out of spec
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4100 — Air Discharge Temperature Alarm 1
Air discharge temperature has reached first warning level.
Likely Causes
- Fouled aftercooler
- High ambient temperature
- Low oil level
First Checks
- Clean aftercooler
- Check ambient temperature
- Verify oil level
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4110 — Air Discharge Temperature Alarm 2
Air discharge temperature exceeded second (shutdown) threshold.
Likely Causes
- Aftercooler severely fouled
- Cooling fan failure
- Oil cooler failure
First Checks
- Clean aftercooler fins
- Check cooling fan operation
- Verify oil cooler function
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4120 — Air Discharge Temperature Sensor Circuit
Air discharge temperature sensor is open or shorted.
Likely Causes
- Sensor wiring break
- Sensor failed
- Connector corrosion
First Checks
- Inspect wiring near hot discharge
- Test sensor
- Replace sensor
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4150 — HP Element Temperature Alarm 1
High-pressure element outlet temperature has reached first warning threshold.
Likely Causes
- Oil cooler restriction
- Thermostatic valve partially stuck
- High load conditions
First Checks
- Check oil cooler condition
- Test thermostatic valve
- Review operating conditions
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4160 — HP Element Temperature Alarm 2
HP element temperature approaching shutdown limit.
Likely Causes
- Oil cooler severely fouled
- Thermostatic valve failure
- Oil circulation blocked
First Checks
- Clean HP oil cooler
- Replace thermostatic valve
- Check oil filter
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4170 — HP Element Temperature Alarm 3 (Shutdown)
HP element temperature exceeded shutdown limit.
Likely Causes
- Complete cooler failure
- Oil starvation
- Bearing failure in element
First Checks
- Immediately shut down and inspect cooler
- Check oil level and pressure
- Inspect HP element bearings
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4190 — HP Element Temperature Sensor Circuit
HP element temp sensor is monitored for short-circuit and wire break.
Likely Causes
- Sensor wiring break
- Sensor shorted
- Sensor failed
First Checks
- Check sensor wiring
- Measure sensor resistance/voltage
- Replace sensor
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4200 — Aftercooler Air Temperature Alarm 1
Aftercooler air outlet temperature above first warning threshold.
Likely Causes
- Fouled aftercooler
- High ambient temperature
- Reduced cooling airflow
First Checks
- Clean aftercooler fins
- Check cooling fan speed
- Verify ambient conditions
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4210 — Aftercooler Air Temperature Alarm 2
Aftercooler air outlet temperature exceeded second alarm level.
Likely Causes
- Severe cooler fouling
- Fan motor failure
- Recirculation of hot exhaust air
First Checks
- Thorough clean aftercooler
- Test fan motor
- Check ventilation layout
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4220 — Aftercooler Air Temperature Sensor Circuit
Aftercooler temperature sensor signal out of range.
Likely Causes
- Sensor wiring fault
- Sensor failure
- Connector issue
First Checks
- Check wiring
- Test sensor
- Replace if failed
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4230 — Aftercooler Freezing Danger
Aftercooler air temperature is dangerously low — risk of freezing condensate.
Likely Causes
- Extremely low ambient temperature
- Cold start in freezing environment
- Cooling water flow too high (water-cooled units)
First Checks
- Ensure room temperature is above freezing
- Check drain valves for ice blockage
- Adjust cooling water flow (water-cooled)
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4240 — Ambient Temperature Alarm (High)
Ambient temperature sensor detected high temperature alarm.
Likely Causes
- Poor room ventilation
- Air recirculation in compressor room
- Hot weather conditions
First Checks
- Check ventilation louvers and fans
- Verify room cooling
- Review ambient vs design limits
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4300 — MP Element Temperature Alarm 1
Mid-pressure element temperature exceeded first warning level (3-stage units).
Likely Causes
- MP oil cooler fouled
- Thermostatic valve problem
- High ambient
First Checks
- Clean MP cooler
- Check thermostatic valve
- Verify ambient conditions
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4340 — MP Element Temperature Sensor Circuit
MP element temperature sensor circuit fault.
Likely Causes
- Wiring break
- Sensor failure
- Connector issue
First Checks
- Check wiring
- Test sensor
- Replace if required
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4400 — Cylinder 1 Temperature Alarm 1
Reciprocating cylinder 1 temperature reached first warning level.
Likely Causes
- Valve wear or leak in cylinder 1
- Insufficient lubrication
- Cooling water or air restriction
First Checks
- Check cylinder 1 valve condition
- Verify lubrication to cylinder
- Check cooling
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4410 — Cylinder 1 Temperature Alarm 2 (Shutdown)
Cylinder 1 temperature at shutdown threshold.
Likely Causes
- Valve failure
- Lack of cooling
- Lubrication failure
First Checks
- Shut down, inspect cylinder 1 valves
- Check cooling
- Verify lubrication
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Atlas Copco · Elektronikon Mk4 / Mk5 / Mk6 / XC series (Xc1004, Xc2003, Xc4004, Xc3003-4003)
4450 — Cylinder 2 Temperature Alarm 1
Reciprocating cylinder 2 temperature warning.
Likely Causes
- Cylinder 2 valve wear
- Cooling restriction
- Lubrication issue
First Checks
- Inspect cylinder 2 valves
- Check cooling flow
- Verify oil lubrication
Source: Atlas Copco CODE DEFAUT ATLAS COPCO COMPRESSEUR (XC controller alarm list)
Page 1 of 11