Refrigeration Fault Codes
Supermarket rack, walk-in, case controller, and ice machine codes for CPC/Emerson E2, Carel, Danfoss, Hussmann, Hill Phoenix, Manitowoc, Hoshizaki, Scotsman, Heatcraft/Bohn, Copeland, and Bitzer.
Coverage
603codes
15 controllers across 15 brands
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Browsing all 603 codes · page 1 of 13
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
CASE TEMP HI LIMIT EXCEEDED — Case Temperature High Limit Exceeded
A single temperature sensor in a Standard Circuit or Case Control Circuit is reading above the defined case temperature high setpoint.
Likely Causes
- Failed evaporator fan motor
- Blocked air flow
- Defrost not terminating
- Refrigerant leak on circuit
- Faulty temp sensor
First Checks
- Verify fan operation in all evaporator sections
- Check defrost termination sensor and setpoint
- Pull gauge pressures on suction circuit
- Inspect sensor resistance vs. temperature table
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
CASE CLEANING WAS STARTED — Case Cleaning Mode Initiated
A case circuit has entered clean mode — fans and compressor are deactivated for cleaning cycle.
Likely Causes
- Manually triggered by operator
- Scheduled cleaning event fired
First Checks
- Verify cleaning was intentional
- Check that clean mode will time out correctly
- Ensure case is returned to normal mode after cleaning
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ALL NETWORK CONNECTIONS USED — Echelon Network Connection Limit Reached
The Echelon controller has reached its maximum number of bound NVs (network variables).
Likely Causes
- Too many network devices added beyond controller capacity
- Configuration error in I/O module addressing
First Checks
- Count active network bindings in E2 configuration
- Remove duplicate or unused device bindings
- Contact Emerson tech support for node expansion options
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ALTERNATE HI LIMIT EXCEEDED — Alternate High Limit Setpoint Exceeded
An analog value in an application using 'alternate' user setpoints has risen above its programmed Hi Limit setpoint.
Likely Causes
- Setpoint programmed too low relative to actual conditions
- Sensor calibration drift
- Refrigeration failure on circuit
First Checks
- Review alternate setpoint configuration
- Calibrate or replace sensor
- Check circuit refrigeration operation
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ALTERNATE LOW LIMIT EXCEEDED — Alternate Low Limit Setpoint Exceeded
An analog value in an application using 'alternate' user setpoints has fallen below its programmed Lo Limit setpoint.
Likely Causes
- Overcooling — liquid refrigerant flooding back
- Setpoint too high
- Sensor fault
First Checks
- Verify setpoint is appropriate
- Check TXV/EEV superheat settings
- Inspect sensor placement and resistance
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
HEAT/COOL APPL NOT KEEPING SETPOINT — AHU/Heat-Cool Application Not Achieving Setpoint
An Air Handling Unit or Heat/Cool application has not achieved setpoint for a prolonged period.
Likely Causes
- Insufficient refrigeration or heating capacity
- Stuck reversing valve
- Setpoint out of equipment range
- Sensor failure
First Checks
- Check supply air temperature vs. setpoint
- Verify reversing valve operation
- Confirm equipment capacity vs. load
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
APPLICATION CELL IS LOST — Application Cell Lost
An internal error has caused the loss of an entire application cell — priority 15 (high).
Likely Causes
- Controller memory corruption
- Firmware update failure
- Power loss during write operation
First Checks
- Reboot E2 controller
- Reload application configuration from backup
- If recurring, replace E2 controller
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
APPLICATION CONFIG HAS CHANGED — Application Configuration Changed
A user has changed the configuration of one of E2's applications — priority 99 (informational).
Likely Causes
- Authorized technician made parameter change
- Unauthorized access
First Checks
- Review audit log for user identity
- Verify new configuration is correct
- Revert if unauthorized
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
APPLICATION SETPOINT HAS CHANGED — Application Setpoint Changed
A user has changed a setpoint in one of E2's applications — priority 99.
Likely Causes
- Technician setpoint adjustment
- Automated demand response event
First Checks
- Confirm new setpoint is within design parameters
- Log change in maintenance record
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ARTC/MULTIFLEX RTU OVERRIDE SWITCH STUCK — ARTC/MultiFlex RTU Override Switch Stuck
An override switch on an ARTC/MultiFlex RTU has been ON for a prolonged period, suggesting possible switch failure — priority 20.
Likely Causes
- Failed override switch
- Deliberate manual override left on
- Wiring short on override input
First Checks
- Physically inspect override switch at ARTC/MultiFlex
- Test switch continuity
- Check wiring for shorts to ground
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ARTC/MULTIFLEX RTU RESET FROM POWER FAILURE — ARTC/MultiFlex RTU Power Failure Reset
An ARTC/MultiFlex RTU lost power and reset when power was restored — priority 50.
Likely Causes
- Power outage or momentary interruption
- Loose wiring at RTU power terminals
- Tripped breaker for RTU circuit
First Checks
- Verify 24VAC supply to RTU is stable
- Check power wiring and connections
- Review alarm log timestamps for correlation with utility events
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ATTEMPT TO WRITE PAST MEM. EOB — Memory Write Beyond End of Buffer
The E2 attempted to write data to memory but the memory was full — priority 50.
Likely Causes
- Excessive logging or large alarm queue
- Corrupted memory allocation
- Firmware bug in older revision
First Checks
- Clear old logs and alarm history
- Update E2 firmware to current release
- If persistent, replace controller or reset to factory defaults
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
AVERAGE LOG STUCK-NO MEMORY — Average Log Cannot Write — No Memory
Average log cannot be written because there is insufficient memory — priority 15.
Likely Causes
- Memory full from large data set
- Flash memory failure
- Too many data logging channels enabled
First Checks
- Delete oldest average log data
- Reduce logging frequency or channel count
- Check E2 memory health
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
BAD MODEM — Modem Not Functioning
The modem on this E2 is not functioning properly — priority 20.
Likely Causes
- Modem hardware failure
- Incorrect modem initialization string
- Phone line fault or disconnected
First Checks
- Test modem with a known-good phone line
- Verify modem init string in E2 settings
- Replace modem if hardware is confirmed bad
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
BATTERY BACKED MEMORY LOST — Battery Backed Memory Loss
Battery backed memory was lost not due to a cleanout operation — priority 30.
Likely Causes
- Dead or failed backup battery
- Extended power outage exceeding battery life
- Battery connection corrosion
First Checks
- Replace E2 backup battery (3V lithium)
- Restore configuration from backup file
- Verify clock and setpoints after restore
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
BATT RUNTIME LIMIT — Battery Runtime Limit Exceeded
Battery runtime has exceeded 80% of the battery lifetime — priority 99.
Likely Causes
- Battery nearing end of service life
- Excessive power outages draining battery
First Checks
- Schedule battery replacement at next PM visit
- Check backup battery voltage
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
BINDING INPUT TO OUTPUT FAILED — Input-to-Output Binding Failed
A valid connection could not be made between an input and an output during network binding — priority 20.
Likely Causes
- I/O module offline or not communicating
- Incorrect node address on I/O module
- Echelon network wiring fault
First Checks
- Verify I/O module LEDs are active
- Check Echelon network wiring polarity
- Re-scan network and re-bind offline modules
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
BIOS/BIOS EXT. UPDATE FAILED — BIOS/BIOS Extension Update Failed
An update to the E2's BIOS has failed — priority 20.
Likely Causes
- Interrupted update process (power loss)
- Corrupted update file
- Incompatible firmware version
First Checks
- Re-attempt update with verified firmware file
- Ensure stable power during update
- Contact Emerson support if controller is bricked
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
CAN'T SET HARDWARE CLOCK — Hardware Clock Cannot Be Set
The E2 is unable to change the time on its hardware clock.
Likely Causes
- Hardware clock chip failure
- Backup battery dead preventing clock maintenance
- Firmware issue
First Checks
- Replace backup battery
- Attempt time sync via E2 time settings menu
- Replace controller if clock chip is faulty
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
DEFROST DID NOT COMPLETE — Defrost Did Not Complete
A defrost cycle did not terminate on temperature — terminated on backup time limit instead.
Likely Causes
- Faulty defrost termination thermostat or sensor
- Heater element failure
- Ice buildup too heavy to clear in allotted time
- Refrigerant overcharge causing excessive frost
First Checks
- Check defrost termination sensor resistance
- Verify heater element continuity
- Increase max defrost time if loads warrant
- Pull refrigerant charge if overcalculated
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
DEFROST WAS SKIPPED — Scheduled Defrost Was Skipped
A scheduled defrost was skipped, typically due to the circuit being in another state.
Likely Causes
- Circuit in override mode
- Defrost already in progress from another initiation
- Case door alarm suppressing defrost
First Checks
- Check E2 defrost schedule configuration
- Verify no manual override is active
- Review defrost log for frequency
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2 POWER FAILED — E2 Controller Power Failure
The E2 controller lost power and has restarted. Logged on power-up to track outage events.
Likely Causes
- AC power outage
- UPS failure
- Tripped breaker on controller panel
First Checks
- Check utility power history and UPS logs
- Inspect breaker and supply wiring
- Verify all I/O modules came back online
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
ECHELON COMM FAILURE — Echelon Network Communication Failure
Communication on the Echelon LON network has failed or a node has gone offline.
Likely Causes
- Broken or shorted Echelon network cable
- Failed I/O module
- Terminator missing from network ends
- Node address conflict
First Checks
- Inspect Echelon wiring for breaks or shorts
- Verify correct termination at both cable ends
- Check I/O module status LEDs
- Re-scan network from E2
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
SUCTION PRESSURE HI LIMIT — Suction Pressure High Limit Alarm
Suction pressure has risen above the programmed high setpoint, indicating insufficient compression or excessive load.
Likely Causes
- Compressor failure or underloaded rack
- Excessive load on suction group
- Liquid slugging back to compressor
- Pressure transducer calibration drift
First Checks
- Verify suction pressure with gauge manifold
- Check rack compressor staging and lead/lag sequence
- Inspect suction line for liquid flooding
- Calibrate or replace suction transducer
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
SUCTION PRESSURE LO LIMIT — Suction Pressure Low Limit Alarm
Suction pressure has dropped below the programmed low setpoint, risking compressor damage from floodback or low pressure cutout.
Likely Causes
- Undercharged system or refrigerant leak
- TXV/EEV starving evaporator
- Restricted liquid line filter-drier
- Low ambient causing head pressure to drop
First Checks
- Pull manifold gauges to confirm pressure
- Check subcooling and superheat readings
- Inspect filter-drier for pressure drop
- Check system charge
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
DISCHARGE PRESSURE HI LIMIT — Discharge Pressure High Limit Alarm
Discharge pressure has exceeded the programmed high setpoint — risk of high pressure cutout on compressors.
Likely Causes
- Dirty or fouled condenser coil
- Condenser fan failure
- Refrigerant overcharge
- High ambient temperature
- Non-condensables in system
First Checks
- Check condenser fan operation
- Clean condenser coils
- Verify head pressure control operation
- Pull discharge manifold pressure
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
COMPRESSOR CIRCUIT BREAKER TRIP — Compressor Circuit Breaker Tripped
A compressor's circuit breaker has tripped. Unit protection event.
Likely Causes
- Compressor locked rotor or overload
- Contactor weld causing run-on
- Wiring short
- Overloaded circuit
First Checks
- Do not immediately reset — check compressor amp draw
- Inspect contactor for welded contacts
- Check wiring at compressor terminals
- Verify motor winding resistance
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
COMPRESSOR OVERLOAD TRIP — Compressor Thermal Overload Trip
Compressor internal overload protector or external OLP has opened, shutting down the compressor.
Likely Causes
- High discharge temperature
- Single-phasing or phase imbalance
- Liquid slugging on startup
- Failed compressor motor windings
First Checks
- Allow 20–30 min cool-down before reset
- Check three-phase voltage and current balance
- Verify crankcase heater is energized during off cycles
- Measure motor winding resistance
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
COMP OIL PRESSURE FAIL — Compressor Oil Pressure Failure
Oil differential pressure switch did not close within the startup time window, or opened during operation.
Likely Causes
- Low oil level in crankcase
- Failed oil pump
- Clogged oil filter screen
- Oil foaming on startup
- Defective oil pressure switch
First Checks
- Check oil sight glass level
- Verify oil pressure switch setpoint and wiring
- Inspect for oil foam by sight glass
- Replace oil filter if restricted
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
HIGH PRESSURE CUTOUT — High Pressure Safety Cutout Opened
The high pressure safety switch (HPCO) has opened, shutting down the compressor. Requires manual reset.
Likely Causes
- Blocked condenser airflow
- Refrigerant overcharge
- Non-condensables in system
- Failed condenser fan
- Discharge service valve partially closed
First Checks
- Check discharge pressure with manifold gauge before resetting
- Inspect condenser fan operation
- Look for airflow obstructions at condenser
- Verify discharge service valve is fully open
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
LOW PRESSURE CUTOUT — Low Pressure Safety Cutout Opened
The low pressure safety switch has opened. May auto-reset if LPCO is set for automatic reset.
Likely Causes
- Refrigerant leak reducing system charge
- TXV starving or ice on evaporator
- Liquid line solenoid not opening
- Blocked suction strainer
First Checks
- Check suction pressure with manifold gauge
- Verify LLSV is opening on call for cooling
- Inspect suction strainer for blockage
- Check for leaks with electronic detector
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
SENSOR FAILURE — PROBE OPEN/SHORT — Temperature Sensor Open or Short Circuit
A temperature probe input is reading an open circuit (>300k ohm) or short circuit (<10 ohm), indicating sensor or wiring failure.
Likely Causes
- Broken sensor wire
- Moisture ingress in sensor connector
- Sensor pulled from mounting bracket
- Failed sensor NTC element
First Checks
- Check sensor resistance at controller terminal — compare to temp/resistance chart
- Inspect wiring for cuts or crimps
- Verify sensor connector is seated
- Replace sensor if resistance is out of range
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
DOOR ALARM — Case Door Open Alarm
A case door has been open longer than the programmed door alarm delay setpoint.
Likely Causes
- Door left open by staff
- Door switch failure
- Damaged door gasket preventing full closure
- Broken door hinge
First Checks
- Physically verify door is closed
- Test door magnetic switch continuity
- Inspect door gaskets for compression seal
- Review E2 door alarm delay setpoint
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
NETWORK DEVICE OFFLINE — Network I/O Device Offline
An I/O board or device on the E2 network has gone offline or stopped communicating.
Likely Causes
- Power loss to I/O module
- Echelon wiring fault or break
- Corrupted node firmware
- Duplicate node address
First Checks
- Check 24VAC supply to offline module
- Inspect LON wiring at affected node
- Reload node firmware from E2 if accessible
- Swap module to test
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-ALL-NETW-USED — All Network Connections Used
Echelon controller reached its limit of bound NVs
Likely Causes
- Too many devices on Echelon network
- Network variable table full
- Configuration error
First Checks
- Review NV count in E2 network config
- Remove unused bindings
- Check Echelon network commissioning
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-ALT-HI-LIM — Alternate Hi Limit Exceeded
Analog value using alternate setpoints rose above Hi Limit
Likely Causes
- Refrigeration circuit temperature out of range
- Incorrect alternate setpoint
- Sensor drift
First Checks
- Check alternate Hi Limit setpoint
- Verify sensor calibration
- Inspect associated circuit
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-ALT-LO-LIM — Alternate Low Limit Exceeded
Analog value using alternate setpoints fell below Lo Limit
Likely Causes
- Temperature dropping below configured low limit
- Setpoint configured incorrectly
- Sensor failure
First Checks
- Check alternate Lo Limit setpoint
- Verify sensor reading accuracy
- Inspect refrigeration components
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-APPL-CELL-LOST — Application Cell Is Lost
Internal error caused loss of an entire application cell
Likely Causes
- Memory corruption
- Power interruption during configuration write
- Firmware defect
First Checks
- Perform E2 cold reset
- Restore from backup configuration
- Contact Emerson support if recurring
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-APPL-CFG-CHG — Application Config Has Changed
A user changed the configuration of one of E2 applications
Likely Causes
- Unauthorized user changed application config
- Normal commissioning activity
- Remote configuration session
First Checks
- Verify configuration change was intended
- Review audit log for user ID
- Confirm setpoints are correct
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-ARTC-OVERRIDE — ARTC/MultiFlex RTU Override Switch Stuck
Override switch ON for prolonged period
Likely Causes
- Switch physically stuck in ON position
- Wiring short holding switch closed
- Component failure
First Checks
- Physically inspect override switch
- Measure switch contact resistance
- Replace switch if stuck
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-ARTC-RESET — ARTC/MultiFlex RTU Reset From Power Failure
RTU lost power and reset when power restored
Likely Causes
- Power interruption at RTU
- Loose wiring at power terminal
- Branch circuit breaker tripped
First Checks
- Check power connections at RTU
- Verify branch circuit breaker status
- Review power quality
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-BAT-MEM-LOST — Battery Backed Memory Lost
Battery backed memory loss not due to cleanout
Likely Causes
- Battery depleted or failed
- Battery connection issue
- PCB damage
First Checks
- Replace RTC battery
- Check battery connector on main board
- Review memory retention after battery change
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-BATT-RUNTIME — Battery Runtime Limit
Battery runtime has exceeded 80% of battery lifetime
Likely Causes
- Battery aging past replacement threshold
- High battery drain
- Poor battery contact
First Checks
- Replace battery immediately
- Check battery voltage
- Verify no excessive drain circuit
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-BIND-FAIL — Binding Input To Output Failed
Valid connection could not be made between input and output
Likely Causes
- Echelon network error
- Device offline when binding attempted
- Software configuration mismatch
First Checks
- Check device status on network
- Re-attempt binding
- Verify device type matches configuration
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-BIOS-UPDATE-FAIL — BIOS/BIOS Ext. Update Failed
Update to E2 BIOS has failed
Likely Causes
- Corrupted firmware file
- Power interruption during update
- Incompatible firmware version
First Checks
- Retry firmware update
- Verify firmware file integrity
- Ensure power stable during update
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-CANT-SET-HW-CLK — Can't Set Hardware Clock
E2 unable to change time on hardware clock
Likely Causes
- RTC chip failure
- Battery depleted causing clock reset loop
- Firmware issue
First Checks
- Check RTC battery voltage
- Replace RTC battery
- If persists replace main board
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-CASE-CTRL-HI — Case Temp Hi Limit Exceeded
Case temp sensor recording above defined case high setpoint
Likely Causes
- Refrigeration system not cooling adequately
- Defrost cycle running too long
- Door gasket failure
- Sensor failure reading high
First Checks
- Check case temperature setpoint
- Verify cooling is active
- Inspect door seals
- Check defrost termination
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-CASE-CTRL-LO — Case Temp Low Limit Exceeded
Case temp sensor recording below defined case temperature low setpoint
Likely Causes
- Setpoint too cold
- Defrost terminated prematurely
- Sensor failure reading low
First Checks
- Review low temperature setpoint
- Check defrost schedule
- Verify sensor accuracy
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-CHECKIT-FAILED — Checkit Sensor Has Failed
Checkit sensor returning an invalid temperature value
Likely Causes
- Sensor probe open circuit
- Wiring break
- Connector corrosion
- Probe physically damaged
First Checks
- Measure sensor resistance
- Inspect wiring from sensor to board
- Replace Checkit sensor probe
Source: scribd.com
Emerson Climate Technologies / CPC · E2 RX/BX/CX, Site Supervisor, ESR8, ParaSync
E2-CHECKIT-ALARM — Checkit Sensor Is Alarming
Checkit sensor on Suction Group recording high temperature
Likely Causes
- Refrigerant loss on that circuit
- EEV stuck closed
- High ambient reducing capacity
First Checks
- Inspect refrigeration on associated circuit
- Check EEV operation
- Pull refrigerant charge
Source: scribd.com
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