Elitech ETC-902

Small one-relay (8 A) controller that heats or cools around a set point and accepts either an NTC or PTC probe, with settings grouped into folders.

What it is: Heat/cool controller

Key combo: Hold SET 5 s for the parameter folders (CP, diS, CnF, FPr). FNC backs out.

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

Elitech ETC-902 error codes

Code	Meaning	Likely cause	How to reset
E1	Probe fault	Probe type does not match H00, wiring fault, or failed probe	Compressor runs on the Ont / OFt cycle. Check H00 first, then measure the probe resistance.
(alarm icon)	Out of range or probe fault	Temperature out of range, or probe fault	Any key mutes the buzzer (buzzer is a factory option).
dLY / DLn	Copy card load passed / failed	Card inserted with power off, then power on	DLn: reseat the card and try again.

How to enter service / parameter mode

Hold SET for 5 seconds. CP (first folder) shows. If a user access code is set in PA1, PAI shows first: press SET and enter it with the arrow keys.
Use the arrows to pick a folder (CP, diS, CnF, FPr) and press SET to open it.

Parameter list

Code	What it does	Range	Default / typical
diF	Differential	1 to 30 °	2
HSE	Highest set point	LSE to 99	99
LSE	Lowest set point	−55 to HSE	−55
HC	Mode	H heating, C cooling	H
Ont	On time with probe fault	0 to 250 min	0
OFt	Off time with probe fault	0 to 250 min	1
dOn	Compressor start delay	0 to 250 s	0
dOF	Minimum off time	0 to 250 min	0
dbi	Minimum time between two starts	0 to 250 min	0
OdO	Output delay at power-up	0 to 250 min	0
LOC	Lock the set point	n / y	n
PA1	User access code (0 = none)	0 to 250	0
ndt	Show decimals	n / y	n
CA1	Probe offset	−12 to 12	0
dro	Units	0 °C, 1 °F	0
H00	Probe type	0 PTC, 1 NTC	1
rEL	Firmware version	Read only	—
tAb	Parameter table	Read only	—
UL / dL	Upload to / download from copy card	Press SET, y = done	—

How to change and save a setting

Step to the code with the arrows and press SET to see its value.
Change it with the arrows and press SET.
Press FNC to go back up to the folder list, and FNC again to return to the temperature display.

Other useful key presses

Task	How
Change set point	Tap SET, adjust with the arrows, press FNC
Mute buzzer	Any key

Notes

Ont/OFt with a probe fault: Ont 0 = off, OFt 0 = on, both above 0 = cycles on Ont then off OFt.
If you set PA1 and forget it, the parameters can no longer be viewed or changed.

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 902 operation instructions (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.