Dixell XR06CX

Two-digit panel controller (32×74 mm face) that runs the compressor, evaporator fans and defrost (electric or hot gas) from a room probe and an evaporator probe, plus one configurable digital input.

What it is: Refrigeration controller. Same keypad logic as the XR01CX, XR02CX, XR03CX and XR04CX. Defaults below are for the XR06CX.

Key combo: Hold SET + DOWN for 3 s to open the parameter list. Hold SET + DOWN again for more than 7 s to reach the hidden (full) menu.

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

Dixell XR06CX error codes

Code	Meaning	Likely cause	How to reset
P1	Room (thermostat) probe fault	Probe open, shorted or badly connected	Clears by itself a few seconds after the probe reads normally again. Check wiring before swapping the probe. While it shows, the compressor cycles on the Cy / Cn times.
P2	Evaporator probe fault	Probe open, shorted or badly connected	Clears by itself once the probe reads normally. While it shows, defrost ends on time (Md) instead of temperature.
HA	High temperature alarm	Room temperature above the AU limit for longer than Ad	Clears by itself when temperature drops back inside the limit. Outputs are not changed.
LA	Low temperature alarm	Room temperature below the AL limit for longer than Ad	Clears by itself when temperature rises back inside the limit.
EA	External alarm from the digital input (iF = EA)	Contact on the digital input changed state for longer than di	Clears as soon as the digital input returns to normal. Outputs are not changed.
CA	Serious external alarm (iF = bA)	Digital input active for longer than di	All outputs switch off. Clears as soon as the digital input returns to normal.
dA	Door open alarm (iF = do)	Door switch open for longer than di	Clears when the door closes. With rd = y, control restarts even while the alarm shows.
OF	Keypad locked	UP + DOWN held for 3 s	Hold UP + DOWN for 3 s until On shows.
Er	Hot Key copy failed	Bad or empty Hot Key, poor contact	Press UP to retry the upload, or pull the key to abort.

How to enter service / parameter mode

Hold SET and DOWN together for 3 seconds. The °C or °F LED starts flashing: you are in the first-level (user) list.
For every parameter, release, then hold SET and DOWN again for more than 7 seconds. L2 shows, then the first parameter (Hy). This is the hidden menu with every parameter.
If the first level is empty, nP shows after 3 seconds. Keep holding until L2 appears.

Parameter list

Code	What it does	Range	Default / typical
Set	Set point	LS to US	−5.0 °C
Hy	Differential (compressor cuts in at set point + Hy)	0.1–25 °C / 1–45 °F	2.0 °C
LS / US	Lowest / highest set point the user can choose	LS −55 °C to Set; US Set to 99 °C	−55 °C / 99 °C
ot / oE	Room / evaporator probe calibration offset	−9.9 to 9.9 °C	0.0
P2	Evaporator probe fitted (y/n)	n / y	y
od	Delay before outputs start at power-up	0–99 min	0
AC	Anti-short-cycle delay (minimum compressor off time)	0–50 min	1
Cy / Cn	Compressor on / off time while the room probe has failed	0–99 min	15 / 30
CF / rE	Units (°C/°F) and resolution (decimal or integer)	°C/°F; dE/in	°C; dE
Ld	What the display shows (room probe, evap probe or set point)	P1 / P2 / SP	P1
dy	Display delay	0–15 min	0
td	Defrost type: EL electric (compressor off) or in hot gas (compressor on)	EL / in	EL
dE	Defrost end temperature (evaporator probe)	−55 to 50 °C	8.0 °C
id	Interval between defrosts	0–99 h	6
Md	Maximum defrost length (or fixed length with no evap probe)	0–99 min	30
dd	Delay before a defrost starts	0–99 min	0
dF	Display during defrost (real temp, start temp, set point or dF label)	rt / it / SP / dF	it
dt	Drip time after defrost (0 = off)	0–99 min	0
dP	Run a defrost at power-up	y / n	n
FC	Fan mode: cn with compressor, off in defrost; on continuous, off in defrost; cY with compressor, on in defrost; oY always on	cn / on / cY / oY	o-n (as printed)
Fd	Fan delay after defrost	0–99 min	10
FS	Evaporator temperature above which fans stay off	−55 to 50 °C	2.0 °C
AU / AL	High / low temperature alarm limits	AU: ALL to 99 °C; AL: −55 °C to AU	99 °C / −55 °C
Ad	Temperature alarm delay	0–99 min	15
dA	Temperature alarms ignored after start-up	0–99 min	90
iP	Digital input polarity	cL / oP	cL
iF	Digital input use: EA external alarm, bA serious alarm, do door switch, dF start defrost, Hc swap heat/cool	EA / bA / do / dF / Au / Hc	do
di	Digital input delay (alarm delay, or door alarm delay)	0–99 min	15
dC	Compressor and fan status with door open	no / Fn / cP / FC	FC
rd	Keep controlling after the door alarm delay	n / y	y
d1 / d2	Read-only room and evaporator probe readings	read only	—

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. The display moves on to the next parameter.
To leave, press SET + UP, or wait 15 seconds without touching a key. The value is kept either way.

Other useful key presses

Task	How
Move a parameter between levels	In the hidden menu, press SET + DOWN on a parameter to add it to or remove it from the first level. A lit decimal point means it is in the first level.
Set point only	Hold SET for 3 s, adjust with UP/DOWN within 10 s, press SET again (or wait 10 s) to store.
Manual defrost	Hold DEF for more than 2 s.
Hot Key upload	Controller on, insert the key, press UP. uP then flashing Ed shows. Press SET, then power off and remove the key.
Hot Key download	Power off, insert a programmed key, power on. do then flashing Ed shows; the unit restarts with the new settings after about 10 s.

Notes

The manual lists the FC default for the XR06CX as printed above; check the actual value on the controller before relying on it.
Parameter values are saved even if you exit by timeout.

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 XR01CX–XR06CX operating manual (2013 edition). 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.