Elitech STC-200+

Basic one-relay thermostat whose single output can be set to cool, heat or act as an alarm contact.

What it is: Cool/heat/alarm thermostat

Key combo: Set + up for 5 s opens the administrator (F0–F5) menu. Set alone for 5 s changes only the set point.

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

Elitech STC-200+ error codes

Code	Meaning	Likely cause	How to reset
E1	Probe open circuit	Probe broken or unplugged	Flashing display and buzzer. In cooling mode the compressor runs 15 min, stops 15 min until fixed.
E2	Probe short circuit	Probe or lead shorted	As E1.
HH	Above +99 °C	Reading over the top of the range	Clears when the reading falls.
LL	Below −40 °C	Reading under the bottom of the range	Clears when the reading rises.

How to enter service / parameter mode

Hold Set and up together for 5 seconds. The set light comes on and F0 shows.
Step with up or down. Press Set to open a code.

Parameter list

Code	What it does	Range	Default / typical
F0	Differential	1 to 16 °C	3 °C
F1	Compressor delay	0 to 8 min	3 min
F2	Lowest allowed set point	−50 °C to set point	−30 °C
F3	Highest allowed set point	Set point to 99 °C	10 °C
F4	Output mode	1 refrigeration, 2 heating, 3 alarm	1
F5	Probe offset	−5 to +5 °C	0

How to change and save a setting

Change the value with up or down and press Set to go back to the code list.
Hold Set 5 seconds, or wait 30 seconds, to save and leave.

Other useful key presses

Task	How
Change set point	Hold Set 5 s, then up or down
See set point / differential	Tap up / tap down
Turn on or off	Hold the on/off key 3 s

Notes

Alarm mode (F4 = 3): the relay closes when the temperature goes above set point + differential or below set point − differential.

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-200 instruction (V2.0). 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.