Elitech EK-3030E

Three-relay (compressor, defrost, fan) cool room controller with On/Off temperatures, room and defrost probes, two digital inputs and RS-485 (Modbus RTU).

What it is: Cool room controller

Key combo: Tap lock/OK 1 s to unlock. Hold lock/OK 5 s for the F menu.

Error codes ↓
Enter service mode ↓
Parameters ↓
Change a setting ↓

Elitech EK-3030E error codes

Code	Meaning	Likely cause	How to reset
E1	Room probe fault	Probe open or shorted	Compressor stops 30 min, runs 15 min until fixed.
E2	Defrost probe fault (alternates with the reading)	Probe open or shorted	Defrost runs on interval and time only. Clears once the probe reads.
E1 + E2	Both probes failed	Both open or shorted	As E1.
HA	High temperature alarm	Room at or above On Temp + F11 for longer than F12 (after the F10 power-up hold-off)	Clears below On Temp + F11.
LA	Low temperature alarm	Room at or below Off Temp − F11 for longer than F12	Clears above Off Temp − F11.
EA	External alarm (digital input = 4)	Input active for longer than A1	Stops as soon as the input clears. Outputs follow A2.
CA	Emergency alarm or pressure switch (input = 3 or 2)	Input active (for longer than A3 for emergency)	Emergency: outputs follow A4, clears with the input. Pressure switch: all relays off, auto-resets up to A8 times, then needs a power-cycle.
dor	Door open too long (input = 1)	Door switch active for longer than A5	Clears when the door closes. Fan/compressor follow A6 and A7.
Err	Settings did not save	Memory write error	Returns to normal after 5 s.

How to enter service / parameter mode

Press lock/OK 1 s to unlock (keypad relocks after 30 s idle).
Temp On / Temp Off: tap the key, adjust with up/down, press lock/OK.
System menu: hold lock/OK more than 5 s until F1 shows.
Hidden list: inside the system menu hold the defrost key 5 s and enter the access code from the manual.

Parameter list

Code	What it does	Range	Default / typical
Temp On	Cut-in (cooling)	Temp Off to 85 °C	10.0 °C
Temp Off	Cut-out (cooling)	−40 °C to Temp On	−10.0 °C
F1	Defrost time	1 to 120 min	30
F2	Defrost interval	0 to 120 h	6
F3	Interval counts	0 controller on time, 1 compressor run time, 2 external timer via digital input	1
F4	Drip time	0 to 120 min	3
F5	Defrost type	0 electric, 1 hot gas, 2 air (fan)	0
F6	Defrost end temperature	−40 to 50 °C	10
F7	Fan mode	−180 to −1 s fan leads compressor; 0 with compressor; c always on; d on but off in defrost and drip; 1 to 300 s fan lags compressor	0
F8	Fan delay after drip	0 to 300 s	30
F9	Compressor restart delay	0 to 10 min	0
F10	Alarm hold-off after power-up	0 to 24 h	2
F11	Alarm band	0 to 50.0 °C	5.0
F12	Alarm delay	0 to 120 min	10
H15 / H16	Digital input 1 / 2	0 off, 1 door, 2 pressure switch, 3 emergency alarm, 4 external alarm, 5 heating mode, 6 defrost start. Positive = N/O, negative = N/C	0
H17	Network address (0 = off)	0 to 128	1
A1	External alarm delay	0 to 240 s	60
A2	Outputs on external alarm	0 no change, 1 compressor off, 2 all off	0
A3	Emergency alarm delay	0 to 240 s	0
A4	Outputs on emergency alarm	0 no change, 1 compressor off, 2 all off	0
A5	Door alarm delay	0 to 240 s	60
A6	Door open action	0 none, 1 fan off, 2 compressor off, 3 both off	3
A7	Fan stop time with door open	ON never stops, OFF stays off until door closes, 1 to 240 s	40
A8	Pressure switch auto-resets (0 = manual only)	0 to 5	2

How to change and save a setting

Step with up/down, tap lock/OK to show the value.
Adjust with up/down and tap lock/OK to store.
Hold lock/OK 3 s, or wait 30 s, to save and exit.

Other useful key presses

Task	How
Manual defrost	Hold the defrost key 3 s (defrost probe below F6). Hold again 3 s to stop
Show defrost probe	Hold down
Save installer preset	Locked: hold Temp On 10 s, COP shows, press lock/OK
Load installer preset	Locked: hold Temp Off 10 s, DON shows, press lock/OK

Notes

Hot gas: the compressor stops 3 minutes before defrost and restarts 2 minutes after.
The manual's hidden parameter table jumps straight to H15; H1–H14 are not listed in this edition, so they are left out here.
With F3 = 2 one digital input must be set to 6 (defrost start) or no defrost will run.

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-3030E user manual (V2.1). 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.