What does P1, P2, or P3 mean on a Dixell XR or XW controller?

P1, P2 and P3 on Dixell XR / XW / XC retail and walk-in refrigeration controllers (XR70CX, XR40CX, XR30CX, XW60K) signal that probe Pb1 (cabinet thermostat), Pb2 (evaporator / defrost) or Pb3 (condenser) has failed open-circuit, short-circuit, or out-of-range. While P1 is active the controller falls back to timed compressor regulation using the Ont and OFt duty-cycle parameters; P2 disables temperature-terminated defrost and runs to the MdF time-out only; P3 disables the condenser high / low temperature alarms (LA2 / HA2). Verify the probe-type parameter Hy0 / P0 (NTC 103AT-2 default), then disconnect the probe and ohm it: a healthy NTC reads ~10 kΩ at 25 °C and ~32 kΩ at 0 °C. Replace the probe if open or shorted.

What is the difference between HA and LA on a Dixell controller?

HA and LA on Dixell XR / XW retail refrigeration controllers are auto-reset temperature-band alarms referenced to probe Pb1. HA trips when the cabinet probe rises above the high-limit threshold (ALU parameter — absolute, or relative to setpoint depending on Att) for longer than the ALd delay; LA trips when temperature falls below the low-limit threshold (ALL parameter). Both clear automatically once temperature returns within the alarm differential (AFH) and are recorded in the ALr alarm folder. Common causes: dirty condenser, defective door seal, low refrigerant charge, alarm threshold set too tight to setpoint, or a probe positioned near the evaporator cold spot. HA2 / LA2 are the equivalent condenser-probe alarms (AH2 / AL2 thresholds). Investigate before silencing — sustained HA on a food-storage cabinet is a HACCP critical control point.

What does EA, CA, or dA mean on a Dixell controller?

EA, CA and dA are external digital-input alarms on Dixell XR / XW controllers. EA (external alarm) is generated when the digital input configured as i1F = EAL closes — typically wired to a remote thermostat, panel safety, or general alarm aggregation. CA (compressor / door alarm) covers two cases depending on i1F: door-switch input held active beyond the door-open delay (OAd) and the regulation switches to off until the door closes, or compressor-protection input. dA (door alarm on some XR firmware) signals a door open longer than the OAd time-out without temperature recovery. All clear automatically when the digital input opens or the door closes; if EA latches permanently, check parameter i1P (input polarity — normally-open vs. normally-closed) matches the field-wired contact.

What does nP mean on a Dixell controller?

nP on Dixell XR / XW controllers means "no probe" — the controller is configured to use a probe channel (Pb2, Pb3, or Pb4) but no physical probe is wired to that input. Typical scenario: a multi-probe controller (XR70CX with Pb2 evaporator probe and Pb3 condenser probe) running on a single-probe application where Pb2 / Pb3 weren't physically installed during commissioning. The fix is parameter-driven: enter Pr2 programming mode (hold SET + DOWN for 7 seconds, enter password 321), find the AP2 / AP3 / AP4 probe-allocation parameters, and either set the relevant probe channel to nu (not used / disabled) or wire and configure the missing NTC sensor. Saving with the probe disabled clears nP without affecting regulation.

What does the AL series (AL01, AL02, AL05, AL08, AL09) mean on a Dixell iChill controller?

On the Dixell IC100CX / IC120CX iChill chiller controllers, AL01–AL77 are the alarm parameter family. AL01 sets the low-pressure alarm delay in seconds (typical 30–120 s) before the LP digital input triggers a trip — prevents nuisance alarms on compressor startup transients. AL02 caps the maximum number of low-pressure events allowed in a rolling 60-minute window before the controller latches and requires manual reset. AL03 controls whether LP monitoring stays active when the compressor is off (1) or is suppressed during pump-down / standby (0). AL05 is the high-pressure alarm delay; AL08 is the thermal-protection bypass timer after compressor start; AL09 is the LP switch trip in heating mode (heat pump). Persistent AL01 / AL05 trips after delay tuning indicate a refrigerant-circuit fault — undercharge, expansion-valve restriction, dirty evaporator, or a stuck pressure switch.

What does E11, E12, E13, or E14 mean on a Dixell XWi70K controller?

E11 / E21, E12 / E22, E13 / E23 and E14 / E24 on the Dixell XWi70K serial-bus controller are the four Embraco variable-speed compressor faults (1 = circuit 1, 2 = circuit 2). E11 / E21 is overload — motor draws current above the EMB inverter trip threshold; the retry function attempts an automatic restart after a timed delay. E12 / E22 is under-speed — the compressor falls below minimum operating RPM, usually from low supply voltage or low refrigerant load. E13 / E23 is wrong-wiring — the CAB / EMB serial cable (DD190001 51) is mis-pinned or open. E14 / E24 is short-circuit — phase-to-phase or phase-to-ground fault in the compressor windings, requires a full power cycle (5-minute capacitor discharge) plus megger insulation testing before restart. HT1 / HT2 covers high-temperature shutdown of the inverter module itself.

What's the difference between Dixell XR, XW, XC, iPro / iChill, and XEV02 fault codes?

Dixell sells five distinct controller families that share the probe-fault scheme but differ in scope. XR (XR40CX, XR70CX) and XW (XW60K) are entry-level retail / walk-in refrigeration controllers — P1–P3 probe faults, HA / LA / HA2 / LA2 temperature alarms, EA / CA / dA digital-input alarms, nP / EE for missing-probe and EEPROM faults. XC (XC1008, XC1011, XC1015) compressor / condenser-rack controllers add E0 (high-pressure switch trip), F1–F16 (fan / function-code series), F7 (HP trip lock-out at AF14 count). iPro / iChill (IC100CX, IC120CX, IC200CX) chiller controllers use the AL01–AL77 alarm series for low / high pressure, thermal-overload, probe-fault (AL20–AL34 for B1–B8 probes), antifreeze, flow-switch, and water-pump faults. XWi70K serial-bus units expose E11–E14 / E21–E24 plus HT1 / HT2 for Embraco inverter-driven compressors. XEV02D digital-compressor PWM valve drivers use E01 (DLT discharge-line over-temp), E03 (block-alarm digital input), E05 (missing regulation signal). Always confirm which Dixell family is installed before consulting a code table — the same E01 means DLT alarm on XEV02D and a probe-1 fault on some XR firmware.

How do I reset a Dixell controller after an alarm?

Dixell alarms split into two reset behaviours. Auto-reset alarms (HA / LA / HA2 / LA2 temperature, P1–P3 probe — once the probe is replaced, EA when the input opens, dA when the door closes) clear automatically as soon as the underlying condition returns to normal; the ALr alarm-history folder retains the record. Manual-reset alarms (E0 high-pressure trip on XC, F7 HP lock-out, AL01-counted lockout per AL02 limit, AL08 thermal-protection latched, E14 / E24 compressor short-circuit on XWi70K) require the technician to fix the root cause first, then enter the AL menu (or press SET + UP for 3 seconds on XR controllers) to clear. Latched safety devices on a physical switch (HP / LP cutouts, motor overload relay) also require the device itself to be reset before the controller will allow restart — power-cycling the controller alone will not clear them. Never repeat-reset a manual alarm without diagnosing the cause.

How do I enter Pr2 programming mode on a Dixell XR controller?

On the Dixell XR40CX / XR70CX / XR30CX retail controllers, the user-level parameters live in Pr1 and the full service-level parameters live in Pr2. Press and hold SET + DOWN simultaneously for about 7 seconds; the display shows "Pr2" and prompts for a password — the factory default is 321. Use the UP / DOWN keys to scroll through parameters, press SET to enter and modify a value, then SET again to save. Exit by pressing SET + UP for several seconds, or wait for the auto-exit time-out (typically 30–60 s of inactivity). On XW controllers the password may be different (default 22 on some firmware) and the access combination uses FNC + DOWN. Always document parameter changes — commissioning sheets are the only reliable record because Dixell controllers do not store an audit log of who changed what.

Where can I find Dixell / Copeland service manuals after the Emerson rebrand?

Dixell official documentation moved to Copeland's webapps portal (webapps.copeland.com/Dixell/) following Emerson's 2023 sale of the climate-technologies business and the 2024 rebrand to Copeland. Manuals are organised by family: XR retail controllers (XR70CX-GB.pdf, XR40CX-GB.pdf, XR30CX-GB.pdf), XW walk-in controllers (XW60K-EN.pdf), XC compressor / rack controllers (XC1008-1011-1015D-GB.pdf, XC650CX, XC645CX), XEV02 valve drivers (XEV02D-GB.pdf), iChill chiller controllers (IC100CX-FW1.8-GRU-GB.pdf, IC120CX, IC200CX), iPro programmable controllers (IPRC208-215-315D-GB.pdf), XWi serial-bus controllers (XWi70K-EN.pdf). The legacy emersonclimate.com URLs still redirect for now but should not be linked in new technician documentation. AskWhiz on WhatsApp returns the relevant Dixell / Copeland manual passage and parameter values directly — no portal browsing required.

Quick Answer

Dixell (now Copeland after the 2024 Emerson rebrand) refrigeration controllers use P1–P3 for Pb1 / Pb2 / Pb3 probe faults, HA / LA for high / low temperature alarms, EA for external safety inputs, CA for door-open, and nP for no-probe. iChill chillers (IC100CX) add AL01–AL77; XWi70K reports E11–E14 / E21–E24 for Embraco compressor faults.

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What error codes does Dixell/Copeland display?

Probe Pb1 (cabinet) fault — verify NTC 103AT-2, ohm probe (10 kΩ at 25 °C), replace if open / shorted

Probe Pb2 (evaporator / defrost) fault — defrost terminates by MdF time-out only, replace probe

Probe Pb3 (condenser) fault — disables HA2 / LA2 condenser alarms, check AP3 allocation

High temperature alarm on Pb1 — inspect condenser, door seal, ALU threshold and AFH differential

Low temperature alarm on Pb1 — verify ALL threshold and probe placement, auto-reset

External alarm — digital input EAL active, check i1P polarity and field safety device

Door / compressor digital-input alarm — door held open beyond OAd, regulation suspended until closed

AL01

Low-pressure alarm delay (IC100CX) — set 30–120 s, AL02 caps trips per hour before manual lockout

AL02

Max LP events per hour (IC100CX) — latches unit on overrun, requires manual AL-menu reset

AL05

High-pressure alarm delay (IC100CX) — prevents startup nuisance trips, persistent trip indicates condenser fault

Common questions about Dixell/Copeland equipment

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