Elitech MTC-6040

Dual-display controller for chillers and display cases that runs the compressor and fans on temperature and a third relay for lights, humidity or alarm.

What it is: Temperature and humidity controller

Key combo: Hold Set 3 s for the user settings. Press up + Set together for the T1–T15 administrator list.

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

Elitech MTC-6040 error codes

Code	Meaning	Likely cause	How to reset
E1	Temperature probe fault	Probe open or shorted	Clears once the probe reads.
E2	Humidity sensor fault	Sensor open or shorted	Clears once the sensor reads.
Ht	High temperature alarm (alternates with reading)	Above SET + HY + EH for longer than T4	Alarm-mute key silences the buzzer; the code and alarm relay stay until cleared.
Lt	Low temperature alarm	Below SET − EL for longer than T4	As Ht.
Hr	High humidity alarm	Above T5 for longer than T7	As Ht.
Lr	Low humidity alarm	Below T6 for longer than T7	As Ht.

How to enter service / parameter mode

User settings: hold Set more than 3 s. The lower display shows SEt; adjust with up/down and press OK to move on through Hy, ot, oh, EH, EL.
Administrator list: press up and Set together. The lower display shows T1, T2…; the upper shows the value.

Parameter list

Code	What it does	Range	Default / typical
SEt	Cut-out temperature	2 to 20 °C	5
Hy	Hysteresis (cut-in = SEt + Hy)	0.1 to 15.0 °C	2
ot	Temperature offset	−10.0 to 10.0 °C	0.0
oh	Humidity offset	−10 to 10 %RH	0
EH	High alarm, above SEt + Hy	0 to 25 °C	3
EL	Low alarm, below SEt	0 to 25 °C	3
T1	Fan start delay	0 to 240 s	60
T2	Fan stop delay	0 to 240 s	60
T3	Alarm hold-off after power-up	0 to 60 h	10
T4	Temperature alarm delay	0 to 60 min	10
T5	High humidity alarm	T6 to 99 %RH	75
T6	Low humidity alarm	0 to T5 %RH	10
T7	Humidity alarm delay	0 to 200 min	10
T8	Compressor restart delay	0 to 15 min	3
T9	Door alarm delay	0 to 15 min	5
T10	Humidity set point	10 to 99 %RH	60
T11	Humidity hysteresis	1 to 50 %RH	15
T12	Humidity mode	0 off, 1 humidify, 2 dehumidify	0
T13	Third relay	0 unused, 1 lights, 2 humidity, 3 alarm	0
T14	Fan mode (table values)	0 with compressor, on when door opens; 1 with compressor, 3 min stop on door open; 2 continuous, 3 min stop on door open; 3 continuous, on when door opens	0
T15	Power key enabled	0 no, 1 yes	1

How to change and save a setting

Adjust with up/down and press OK to save and move to the next item.
After the last item OK returns to the first. No key for 30 s saves and exits.

Other useful key presses

Task	How
Switch on/off	Hold the power key 3 s (T15 = 1)
Mute buzzer	Press the alarm-mute key

Notes

The manual's written fan-mode list does not match its T14 table; the table values are given here. Check the fan behaviour on the unit after setting T14.

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 MTC-6040 operating instructions. 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.