Elitech EK-3020 / EK-3021

Six-key on/off cooling controllers with separate cut-in and cut-out set points and timed defrost (electric or hot gas).

What it is: Refrigeration temperature controller. EK-3020 has a cabinet probe only; EK-3021 adds a defrost (evaporator) probe with defrost end temperature F6 and settings H8/H9.

Key combo: Hold OK 1 s to unlock. Hold OK over 5 s for the F menu; from there hold OK over 5 s again for the hidden H menu (needs the access code).

Elitech EK-3020 / EK-3021 error codes

CodeMeaningLikely causeWhat to do
E1Cabinet probe faultProbe open or shortedCompressor runs a fixed 30 min off / 15 min on cycle until fixed.
E2Defrost probe fault (EK-3021)Probe open or shortedShown in turn with the cabinet temperature; defrost ends on time only.
E1 + E2Both probes failed (EK-3021)Shown alternately.
HAHigh temperature alarmCabinet above On Temp + F11 (or H3) for longer than F12Clears once back in range.
LALow temperature alarmCabinet below Off Temp - F11 (or H4) for longer than F12Clears once back in range.
ErrSettings could not be savedMemory write errorPower the controller off and on, then re-enter.

How to enter service / parameter mode

  1. Press OK for 1 s to unlock (relocks after 30 s idle).
  2. Set points: press On Temp or Off Temp, adjust with ▲/▼; OK or 30 s idle saves.
  3. F menu: hold OK over 5 s until F1 shows. ▲/▼ to pick, OK to view and save.
  4. Hidden H menu: inside the F menu hold OK over 5 s, then enter the access code from the manual.
  5. Factory reset: while locked hold ▲ over 10 s until rES shows, then press OK within 3 s.
  6. Save your own preset: while locked hold On Temp 10 s (COP), press OK. Restore it: hold Off Temp 10 s (don), press OK.

Parameter list

CodeWhat it doesRangeDefault / typical
On TempCompressor cut-in temperatureOff Temp to 85.0 °C10.0 °C
Off TempCompressor cut-out temperature-40.0 °C to On Temp-10.0 °C
F1Defrost duration1–120 min30 min
F2Defrost interval (0 = off)0–120 h6 h
F3Interval counts controller time (0) or compressor time (1)0 / 11
F4Drip time after defrost0–120 min3 min
F5Defrost type: electric (0) or hot gas (1)0 / 10
F6Defrost end temperature (EK-3021 only)-40.0 to 50.0 °C10 °C
F9Compressor restart delay0–10 min0
F10Alarm block after power-up0–24.0 h2.0 h
F11Alarm band0–50.0 °C5.0 °C
F12Alarm delay0–120 min10 min
F13Cabinet probe offset-10.0 to 10.0 °C0.0
H1 / H2Compressor off / on time with a failed cabinet probe1–60 / 0–60 min30 / 15 min
H3 / H4Absolute high / low alarm (used when H5 = 0)to 85.0 °C / from -40.0 °C20.0 / -20.0 °C
H5Alarm type: absolute (0) or relative to set points (1)0 / 11
H6Buzzer on alarm0 / 11
H7Display during defrost: temperature / dEF / start temperature0 / 1 / 20
H8Defrost probe fitted (EK-3021)0 / 11
H9Defrost probe offset (EK-3021)-10.0 to 10.0 °C0.0
H17Display decimals (0) or whole numbers (1)0 / 10

Notes

For licensed technicians only. This equipment can involve mains voltage, high-voltage microwave circuits, gas and refrigerant. Isolate power (and gas) before opening panels, follow the manufacturer's manual and your local licensing rules (for example ARC refrigerant handling and electrical or gas licences). Wrong settings can spoil food or damage equipment. Check every value on the unit in front of you before changing it.

Based on: Elitech EK-3020 and EK-3021 user manuals (scanned, read by eye). Always check the manual for your exact model and software version.

ServiceModes is not affiliated with Elitech or any other manufacturer. Written in our own words from the manufacturer's documentation.

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