Dixell XR80CX

32×74 mm controller for milk cooling tanks. One probe runs the compressor, and a second relay runs the agitator on timed cycles.

What it is: Milk tank controller

Key combo: Hold SET + DOWN for 3 s for the user level. Hold SET + DOWN again for over 7 s for the hidden menu (Pr2).

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

Dixell XR80CX error codes

Code	Meaning	Likely cause	How to reset
P1	Tank probe fault	Probe open, shorted, unplugged or wrong type (PbC)	Clears by itself a few seconds after the probe reads normally. Check wiring and PbC before replacing the probe. Compressor cycles on the Con / CoF times meanwhile.
HA	High temperature alarm	Milk above ALU for longer than ALd	Clears by itself when back inside the limit.
LA	Low temperature alarm	Milk below ALL for longer than ALd	Clears by itself when back inside the limit.
dA	Door / lid open alarm	Door input open longer than did	Clears when it closes. Compressor and agitator restart.
EA	External alarm	Digital input active	Clears when the input goes back to normal.
CA	Serious external alarm (bAL) or pressure switch (PAL)	Digital input active	All outputs off. bAL clears when the input resets; PAL needs a power off and on.
EE	Memory fault	Internal memory check failed	Controller needs service or replacement.

How to enter service / parameter mode

Hold SET and DOWN together for 3 seconds. The °C or °F light flashes: you are in the user level (Pr1).
Let go, then hold SET and DOWN again for more than 7 seconds. Pr2 shows, then Hy. You are now in the hidden menu with every parameter.
If the user level is empty, noP shows first. Keep holding until Pr2 appears.

Parameter list

Code	What it does	Range	Default / typical
Hy	Differential: compressor cuts back in at set point + Hy	0.1–25.5 °C	2.0 °C
LS	Lowest set point a user can choose	−50 °C to set point	−30.0 °C
US	Highest set point a user can choose	Set point to 110 °C	20.0 °C
AC	Minimum off time between compressor stop and restart	0–50 min	1 min
COn	Compressor run time per cycle when the room probe has failed	0–255 min	15 min
AGC	Agitator runs with the compressor (EL) or on its own timer (in)	EL / in	Check on unit
iAG	Time between agitation cycles	1–120 min	Check on unit
AGt	Length of an agitation cycle	0–255 (min or s)	Check on unit
APo	Run an agitation cycle straight after power-up	n / Y	Check on unit
ALU	High temperature alarm limit	Alarm range	100
ALL	Low temperature alarm limit	Alarm range	−50.0
ALd	Delay before a temperature alarm shows	0–255 min	15 min
i1F	What the digital input does (door, external alarm, pressure switch, defrost, etc.)	EAL, bAL, PAL, dor, AGt, AUS, Htr, FAn…	EAL
PbC	Probe type (PTC or NTC; Pt1000 on some versions)	PTC / NTC	NTC
onF	Whether the front key can switch the controller off	nu, oFF, ES	nu

How to change and save a setting

Scroll with UP or DOWN to the parameter code.
Press SET to show its value.
Change it with UP or DOWN.
Press SET to store it and move to the next parameter.
To leave, press SET + UP or wait about 15 seconds. Values are kept either way.

Other useful key presses

Task	How
Start or stop an agitation cycle	Press the AGT (UP) key.
Lock or unlock keys	Hold UP + DOWN for 3 s.

Notes

With AGC = EL the agitator runs whenever the compressor runs and carries on for AGt afterwards. With AGC = in it runs on its own timer.
An agitation request during the power-up delay (odS) waits until the delay ends.

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: Dixell XR80CX installing and operating instructions. Always check the manual for your exact model and software version.

ServiceModes is not affiliated with Dixell or any other manufacturer. Written in our own words from the manufacturer's documentation.