Dixell iChill IC260 / IC261 (L and D)

One- or two-circuit controller for air or water chillers and heat pumps, with up to six compressors, pumps, condenser fans and sanitary hot water.

What it is: Chiller / heat pump controller. IC260 has 10 relays, IC261 has 14. L models have the built-in display, D models are DIN-rail with a remote keypad.

Key combo: SET + DOWN for 3 s opens Pr1; hold UP 2 s for Pr2, again for Pr3 (each asks for its level code).

Error codes ↓
Enter service mode ↓
Change a setting ↓

Dixell iChill IC260 / IC261 (L and D) error codes

Code	Meaning	Likely cause	How to reset
AP1 … AP12	Probe 1 to 12 fault	Probe open, shorted or not configured right	Automatic when the probe reads. Compressors stop if it is a control or circuit probe.
AEFL	Evaporator flow alarm	Flow switch open (no water flow)	Compressors and condenser fan off. Check pump, strainer and flow switch.
ACFL	Condenser flow alarm	Condenser water flow switch open	Compressors off. Manual reset if set that way.
AHFL / APFL	Sanitary water / solar panel flow alarm	Flow switch open on that loop	Check the pump and flow switch.
AtSF	Supply fan overload	Fan overload input tripped	Compressors off. Reset the overload.
AtE1 / AtE2	Evaporator pump 1 / 2 overload	Pump overload input tripped	Compressors stop if no other pump is available.
AtC1 / AtC2	Condenser pump 1 / 2 overload	Pump overload input tripped	As above.
AtAS / AtHS	Sanitary pump / sanitary heater overload	Overload input tripped	Reset the overload.
AEP1 / AEP2 / ACP1 / ACP2 / ASAn / ASUn	Pump maintenance due	Running-hours limit reached	Service, then reset the hour counter.
ArtC / ArtF	Clock error / clock faulty	Clock not set or failed	Set the clock; replace if it returns.
Atr1 / Atr2	Remote keypad 1 / 2 fault	Lost connection to the remote panel	Check the CAB/CJ30 cable.
ALc1 / ALc2	Generic alarm	Digital input set as generic alarm is active	Compressors, pumps and fans follow the alarm setting.
AEE	EEPROM alarm	Memory fault	Everything stops. Reprogram or replace.
ACF1, ACF2 …	Configuration alarm	Contradictory parameter settings	Correct the configuration (unit in stand-by).
AEUn	Unloading from high evaporator water temperature	Water too warm	Message only.
ALti	Low evaporator inlet temperature (air/air)	Inlet air too cold	Check airflow and set points.
AEht	High evaporator inlet water temperature	Water above the limit	Compressors stop.
AFr	Supply frequency alarm	Mains frequency wrong	Check the supply.
ALSF	Phase sequence failure	Phases reversed or missing	Correct the supply wiring.
b(n)HP / b(n)LP	High / low pressure switch, circuit (n)	Pressure switch open. (n) is the circuit number, 1 or 2.	Compressors of that circuit stop.
b(n)AC / b(n)AH	Anti-freeze in chiller / heat pump mode, circuit (n)	Water too cold	Compressors of that circuit stop.
b(n)hP / b(n)lP	High / low condensing pressure or temperature, circuit (n)	From transducer or NTC	Compressors of that circuit stop.
b(n)tF	Condenser fan overload, circuit (n)	Fan overload tripped	Compressors of that circuit stop.
b(n)PH / b(n)PL	Pump-down alarm at stop / at start-up, circuit (n)	Pump-down did not finish in time	Compressors of that circuit stop.
b(n)dF	Bad defrost, circuit (n)	Defrost ended on time, not temperature	Check the defrost probe and setup.
b(n)Cu	Unloading, circuit (n)	High condenser or low evaporator temperature/pressure	Capacity reduced automatically.
b(n)ds	Circuit (n) disabled from keypad	Switched off by the user	Re-enable in the menu.
C(n)HP	Compressor (n) high pressure switch	Pressure switch on that compressor open. (n) = 1 to 6	That compressor stops.
C(n)oP	Compressor (n) oil pressure / oil level switch	Oil switch open	That compressor stops.
C(n)tr	Compressor (n) overload	Thermal protection tripped	Reset with COtr in the function menu.
C(n)dt	Compressor (n) high discharge temperature	Discharge too hot	That compressor stops.
C(n)Pd	Compressor (n) oil differential	Oil differential switch open	That compressor stops.
C(n)dS	Compressor (n) disabled from keypad	Switched off by the user	Re-enable in the menu.
C(n)Mn	Compressor (n) maintenance due	Running-hours limit reached	Service, then reset the counter.

How to enter service / parameter mode

Function menu (alarm list, compressor overload reset, alarm log, Hot Key upload): press the M key once.
In the menu pick ALrM: the bottom display shows each alarm code. Scroll with up/down; press SET on one to reset it if its cause has gone.
Parameters: press SET + DOWN together for 3 s for Pr1. From Pr1 hold UP 2 s for Pr2 and again for Pr3. Each level asks for its own access code (see the manual; the codes can be changed).

How to change and save a setting

Scroll to the parameter family and parameter with up/down, press SET to edit.
Change with up/down and press SET to store.
Configuration (CF) parameters can only be changed with the unit in stand-by, not running in chiller or heat pump.

Other useful key presses

Task	How
Reset compressor overload	Function menu → COtr
Read / clear alarm log	Function menu → ALOG
Copy parameters to Hot Key	Function menu → UPL

Notes

The full parameter list runs to hundreds of codes and is not repeated here; use the guide for your firmware.
Some flow and pump alarms are set for manual reset and need SET in the alarm list once fixed.

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 iChill IC260/261 L/D quick reference guide (FW 1.9, 2016). 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.