Elitech STC-8000HX and STC-8080HX

Two-digit, whole-degree cooling controller that runs the compressor between an upper (cut-in) and lower (cut-out) temperature, with a high/low alarm.

What it is: Cooling thermostat. The STC-8080HX adds a defrost relay and the F7/F8 defrost settings. Both are the -02 versions.

Key combo: Hold Set for 3 s to open the F-menu.

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

Elitech STC-8000HX and STC-8080HX error codes

Code	Meaning	Likely cause	How to reset
E1	Memory (stored settings) fault	Error found in the saved data at power-up	Controller will not run. Press Set to load factory values, then re-enter your settings.
E2	Probe fault	Probe open or shorted	Buzzer sounds. Compressor runs 15 min, stops 30 min until fixed. Clears once the probe reads.
HH	Above display range	Measured temperature between 99 and 120 °C	Clears when the reading drops.
(flashing reading)	High or low temperature alarm	Above F1 + F5 or below F2 − F5 for longer than F6	Buzzer and flashing display. Any key mutes the buzzer. Clears when back in range.

How to enter service / parameter mode

Hold Set for 3 seconds. The set (spanner) light comes on and the last code you edited shows.
Step through the codes with up or down. Press Set to see a value.

Parameter list

Code	What it does	Range	Default / typical
F1	Cut-in (upper) temperature	F2 to 50 °C	−10 °C
F2	Cut-out (lower) temperature	−40 °C to F1	−20 °C
F3	Probe offset	−5 to +5 °C	0
F4	Compressor restart delay	0 to 9 min	3
F5	Alarm band beyond F1/F2 (0 = no alarm)	0 to 50 °C	15
F6	Alarm delay	0 to 99 min	20
F7	Defrost interval, 8080HX (0 = no timed defrost)	0 to 99 h	8
F8	Defrost time, 8080HX (0 = no timed defrost)	0 to 99 min	20

How to change and save a setting

Hold Set and press up or down to change the value (hold both to run fast).
Press Rst, or leave it 30 seconds, to save and exit.

Other useful key presses

Task	How
See cut-in / cut-out	Tap up / tap down
See restart delay (8000HX) or defrost interval (8080HX)	Tap Set
See alarm band (8000HX) or defrost time (8080HX)	Tap Rst
Manual defrost on / off (8080HX)	Hold up 3 s to start; hold down 3 s to stop

Notes

Cooling is off during defrost.
Settings are whole degrees only.

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 STC-8000HX-02 and STC-8080HX-02 user manuals (V1.0). 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.