Carel easy (PJEZ)

Low-cost panel thermostat for plug-in fridges and freezers with up to three probes, compressor relay and on some models defrost, fan and aux outputs.

What it is: Refrigeration thermostat. Covers the easy, easy compact and easy split families. Parameter visibility depends on the model letter (S, X, Y, C, M).

Key combo: Hold SET for 3 s until PS shows, press SET, enter the service password with UP/DOWN, press SET.

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

Carel easy (PJEZ) error codes

Code	Meaning	Likely cause	How to reset
E0	Probe 1 (control) fault	Probe open, shorted or wrong type	Clears by itself when the probe reads normally. Buzzer and alarm relay on.
E1	Probe 2 (defrost) fault	Probe open, shorted or wrong type	Clears by itself.
E2	Probe 3 (condenser / product) fault	Probe open, shorted or wrong type	Clears by itself.
IA	External alarm from the digital input	Input set as alarm (A4) has triggered	Clears by itself after the input returns to normal.
dOr	Door open alarm	Door switch open longer than A7	Clears by itself when the door closes.
LO	Low temperature alarm	Below the AL limit for longer than Ad	Clears by itself. Check AL, Ad and A0.
HI	High temperature alarm	Above the AH limit for longer than Ad	Clears by itself. Check AH, Ad and A0.
EE	Unit parameter read error	Corrupt memory	If it stays or keeps coming back, replace the controller.
EF	Operating parameter read error	Corrupt parameters	Manual: re-enter and re-save the parameters.
Ed	Last defrost ended on time, not temperature	Defrost too short (dP), end temp (dt) too high, heater or probe problem	Clears after the next defrost that ends correctly. Shown only if A8 = 1.
dF	Defrost running (not an alarm)	Normal defrost, shown when d6 = 0	Clears at the end of defrost.
cht	Dirty condenser pre-alarm	Condenser hotter than Ac	Clears by itself. Clean the condenser; check A4, Ac, AE, Acd.
CHt	Dirty condenser alarm	Condenser hotter than Ac + AE for Acd	Manual reset after cleaning.
EtC	Clock fault	Clock in use but not set	Set the time (dAY, hr, Min).
SrC	Maintenance due (easy split only)	Service interval reached (HMP)	Set HMr = 1.

How to enter service / parameter mode

Hold SET for more than 3 seconds (mute the buzzer first if an alarm is active). PS shows.
Without a password you can scroll the F (frequent) parameters straight away with UP and DOWN.
For C (configuration) parameters, press SET at PS, enter the service password with UP/DOWN and press SET.

Parameter list

Code	What it does	Range	Default / typical
PS	Password for configuration parameters	0–200	22
/2	Probe reading stability (filter)	1–15	4
/4	Probe shown on the display	1–3	1
/5	°C (0) or °F (1)	0–1	0
/C1 / /C2 / /C3	Probe 1 / 2 / 3 offset	−50 to 50	0
St	Set point	r1 to r2	4
rd	Control differential	0–19	2
r1 / r2	Lowest / highest set point allowed	−50 to r2; r1 to 200	−50 / 90
r3	Direct (cooling) or reverse (heating) operation	0–2	0
r4	Night set point change	−50 to 50	3
c0	Compressor and fan delay at power-up	0–100 min	0
c1 / c2 / c3	Minimum time between starts / minimum off / minimum on	0–100 min	0
c4	Compressor on time while the control probe has failed	0–100 min	0
cc / c6	Continuous cycle length / alarm bypass after it	0–15 h	4 / 2
d0	Defrost type	0–4	0
dI	Interval between defrosts	0–199 h	8
dt	Defrost end temperature	−50 to 130	4
dP	Maximum defrost time	1–199 min	30
d4 / d5	Defrost at power-up / delay before it	0–1; 0–199 min	0 / 0
d6	Freeze the display during defrost	0–1	1
dd	Drip time	0–15 min	2
d8	Alarm bypass after defrost	0–15 h	1
A0	Alarm and fan differential	−20 to 20	2
AL / AH	Low / high temperature alarm (absolute or relative)	−50 to 250	0 / 0
Ad	Temperature alarm delay	0–199 min	0
A4	Third input function	0–11	0
A7	Digital input alarm delay	0–199 min	0
A8	Enable the Ed warning	0–1	0
Ac / AE / Acd	Dirty condenser alarm set point / differential / delay	−50 to 250; 0.1–20; 0–250 min	70 / 5.0 / 0
F0	Evaporator fan control on (C models)	0–1	0
F1	Fan control set point	−50 to 130	5
F2 / F3	Fans stop with compressor / fans during defrost	0–1	1 / 1
Fd	Fan delay after drip	0–15 min	1
H1	AUX output use	0–3	0
H2	Keypad enable	0–1	1
EZY	Quick preset selection	0–4	0

How to change and save a setting

Scroll to the parameter with UP or DOWN. The LED for its group lights.
Press SET to see the value.
Change it with UP or DOWN.
Press SET to keep it for now.
Hold SET for more than 3 seconds to save everything and exit (the PJEZ quick sheet says 5 seconds).
If no key is pressed for 60 seconds, or power is lost before saving, the changes are lost.

Other useful key presses

Task	How
Restore defaults	Power off, then power on holding SET and DOWN. CF shows and the controller restarts on factory settings.
Quick presets (EZY)	Set EZY to 1–4 to load a ready-made set of parameters for common jobs (normal or low temperature, timed or probe defrost, etc.).

Notes

Values are from the easy (not easy compact or split) table. Ranges differ a little on the other two families and on the PJEZ quick sheet.

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: Carel easy / easy compact / easy split user manual (+030220791 rel. 3.3) and the PJEZ easy programming sheet. Always check the manual for your exact model and software version.

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