Alarm & fault codes and reports

Write the exact code and tool model. The answer remains linked to the correct manual, without confusing different devices.

599documented combinations

01 · Code on display02 · Controlled instrument

Write code and template, then press Search Response.

Don't you find your instrument?

The catalog is a selection, does not cover any firmware or variant. Check the tag and review of the manual.

Search the manual in Manual library →

Before canceling the alarm

Note code, model and phase of operation. The meaning directs diagnosis: it does not identify the fault component alone and does not authorize reboot.

Continue from Troubleshooting →

Publishing summary independent of producer documents · sources consulted on 11 September 2026. The capital/minuscole letters can distinguish different alarms.

View by instrument

Activate JavaScript to search for code and model. You still find all the meanings here.

Danfoss AK-CC55 Compact

E01 — Hardware anomaly
E06 — Not valid now
E20 — Pe A sensor abnormality
E24 — S2 sensor abnormality A
E25 — S3 sensor abnormality A
E26 — S4 sensor abnormality A
E27 — S5 sensor abnormality A
E37 — Sensor anomaly S5 B
A01 — High temperature A
A02 — Low temperature A
A04 — Extended open door
A05 — Excessive post-sfrost
A11 — Refrigerant not selected
A15 — Input alarm DI1
A16 — Input alarm DI2
A19 — Compressor safety 1
A45 — OFF main switch
A59 — Active bench cleaning
AA2 — Loss CO2 detected
AA3 — Detected refrigerant loss
♪ — Configuration I/O incorrect
to 12 — Compressor safety 2
to 13 — Compressor Safety Lock

Official Manual

Dixell XER100P / XER200P

P — Anomaly temperature probe P1
P — Anomaly temperature probe P2
P — Anomaly temperature probe P3
P — Anomaly temperature probe P4
HA HA — High temperature
THE — Low temperature
HP2 — Pre alarm high temperature
HA2 — Second high temperature
LA2 — Second low temperature
d — Open door
EA — External warning
CA — External block
Pa — pressure switch alarm
E — Anomaly internal memory
rt — Clock to set
rt — Hardware watch anomaly
b. — Low battery
SAF — Antifreeze alarm
tPA — Person in cell
Pdd — Pump-down alarm
PdA — pressure switch
CL — Active cleaning
GAS — Gas loss
♪ — Maintenance fan evaporator
CSR — Condenser fan maintenance
♪ — Defrost ended on timeout
SAN — Active sanitation

Official Manual

Dixell XM669K / XM679K

No. — Selected card absent
No. — Interrupted keyboard communication
P — Anomaly temperature probe P1
P — Anomaly temperature probe P2
P — Anomaly temperature probe P3
P — Anomaly temperature probe P4
P — Anomaly temperature probe P5
P6 — Anomaly temperature probe P6
PPF — Remote pressure not received
CPF — temperature probe remote 4 unavailable
HA HA — High temperature
THE — Low temperature
HA2 — Second high temperature
LA2 — Second low temperature
d — Open door
EA — External alarm
CA — External block
PAL — pressure switch block
LOP — Pressure under limit
MOP — Pressure above limit
LSH — Low superheat
HSH — superheat
rt — Perse watch settings
rt — Dead clock
E — Anomalous
E. — Transfer failed parameters

Official Manual

Dixell

P — Anomaly temperature probe thermostat
P — Anomaly temperature probe evaporator
P — Anomaly temperature probe 3
P — Anomaly temperature probe 4
HA HA — High temperature
THE — Low temperature
HA2 — Condenser too hot
LA2 — Too cold condenser
EA — External alarm
CA — External lock / pressure switch
d — Open door

Official Manual

Dixell XR70CX

P — Anomaly temperature probe thermostat
P — Anomaly temperature probe evaporator
P — Anomaly temperature probe 3
P — Anomaly temperature probe 4
HA HA — High temperature
THE — Low temperature
HA2 — Condenser too hot
LA2 — Too cold condenser
EA — External alarm
CA — External lock / pressure switch
d — Open door

Official Manual

Dixell XC650CX

E01L — Low threshold suction 1
E02L — Low threshold suction 2
E0L1 — pressure switch low circuit 1
E0L2 — pressure switch low circuit 2
E0H — pressure switch
P — Anomaly temperature probe P1
P — Anomaly temperature probe P2
P — Anomaly temperature probe P3
P — Anomaly temperature probe P4
EA1 — Safety load 1
EA2 — Safety load 2
EA3 — Safety load 3
EA4 — Safety load 4
EA5 — Safety load 5
EA6 — Safety load 6
C1-LA — suction low circuit 1
C2-LA — suction low circuit 2
F-LA — Low density
C1-HA — suction high circuit 1
C2-HA — suction high circuit 2
F-HA — High density
A5 — Liquid level alarm
A12 — incorrect configuration
A14 — Load maintenance required
EA — External alarm
Inf — Drives alarm fan
PrSH — superheat low alarm
ALSH — Low superheat alarm

Official Manual

CAREL UltraCella

r — Virtual temperature probe anomaly
E0 — Anomaly temperature probe B1
E — Anomaly temperature probe B2
E — Anomaly temperature probe B3
E — Anomaly temperature probe B4
E — Anomaly temperature probe B5
LO — Low temperature
HI — High temperature
I — Immediate external alarm
SA — Severe external alarm
P — Timeout pump-down
LP — Low pressure
At — Automatic pump-down reboot
CH — Condenser too hot
♪ — Extended open door
Etc — Dead clock
E — EEPROM machine parameters
EF — EEPROM operating parameters
Ed. — Timeout frost1
Ed. — Timeout sfrost2
HA HA — HACCP HA alarm
HF — HACCP HF alarm
Logo — Downloading failed temperatures
♪ — Upload failed parameters
♪ — Download failed parameters
SOF — Updating failed software
SHA — EVD1: superheat low
SHB — EVD2: superheat low
LOA — EVD1: LOP protection
LOB — EVD2: LOP protection
♪ — EVD1: MOP protection
♪ — EVD2: MOP protection
EEA — EVD1: engine-valve anomaly
E'b — EVD2: engine-valve anomaly
LSA — EVD1: Cold suction
LSB — EVD2: Cold suction
EPE — Three-phase module offline
EP0 — Anomaly temperature probe Sd1
EP1 — Anomaly temperature probe Sd2
EP2 — Anomaly temperature probe ♪
EP — Triphase module configuration
EPM — Three-phase rescuer intervention
EPU — Plated/Kriwan three-phase module
ALM — Unsuccessful historical download
IEC — EVD ICE configuration anomaly

Official Manual

CAREL ir33 refrigeration

r — Virtual temperature probe anomaly
E0 — Anomaly temperature probe S1
E — Anomaly temperature probe S2
E — Anomaly temperature probe S3
E — Anomaly temperature probe S4
E — Anomaly temperature probe S5
LO — Low temperature
HI — High temperature
AFr — Antifreeze alarm
I — Immediate external alarm
d — Retarded external alarm
Ed. — Timeout frost evaporator 1
Ed. — Timeout sfrost evaporator 2
P — Timeout pump-down
LP — Low pressure
At — Automatic pump-down reboot
♪ — Pre alarm heat condenser
CHT — Hot condenser alarm
♪ — Extended open door
Etc — Dead clock
E — EEPROM machine parameters
EF — EEPROM operating parameters
HA HA — HACCP HA alarm
HF — HACCP HF alarm

Official Manual

Danfoss ERC 21X

E29 — Anomaly temperature probe air
E27 — Anomaly temperature probe evaporator
E30 — Anomaly temperature probe capacitor
A01 — High cold-room temperature
A02 — Low cold-room temperature
A99 — Power supply too high
AA1 — Too low power supply
A61 — Condenser too hot
A80 — Hot condenser lock
A04 — Extended open door
A15 — Digital input alarm
A45 — Standby regulation

Official Manual

Danfoss VLT FC 103

1 — Low 10V reference
2 — No live-zero signal
3 — Motor not detected
4 — Missing network phase
5 — High DC bus
6 — Low DC bus
7 — DC overvoltage
8 — DC Subsequent
9 — Drives overload
10 — Over-temperature ETR engine
11 — Over-temperature engine heater
12 — Couple limit
13 — Overcurrent
14 — Gain to the ground
15 — Incompatible hardware
16 — Short circuit
17 — Timeout word control
18 — Failed start
19 — discharge too hot
23 — Inner fans
24 — External fans
25 — Short-circuit braking resistance
26 — Limit brake power
27 — Chopper short-circuit braking
28 — Brake control
29 — Overheated power sheet
30 — Motor phase U absent
31 — Motor phase V absent
32 — Motor phase W absent
33 — Pre-loading abnormalities
34 — Anomaly fieldbus communication
36 — Network feeding abnormalities
38 — Internal error
47 — Low 24V power supply
48 — Low 1,8V power supply
49 — Speed limit
50 — AMA calibration failed
51 — AMA: check Unom/Inom
52 — AMA: Low inom
98 — Clock anomaly

Official Manual

CAREL MPXPRO

r — temperature probe anomaly
E — Anomaly temperature probe S1
E — Anomaly temperature probe S2
E — Anomaly temperature probe S3
E — Anomaly temperature probe S4
E — Anomaly temperature probe S5
E6 — Anomaly temperature probe S6
E7 — Anomaly temperature probe S7
E8 — temperature probe S8 not updated
E9 — temperature probe Not updated
E10 — temperature probe S10 not updated
E11 — temperature probe S11 not updated
LO — Low temperature
HI — High temperature
LO2 — Second low temperature
HI2 — Second high temperature
I — Immediate external alarm
d — Retarded external alarm
♪ — Extended open door
Etc — Dead clock
LSH — Low superheat
LSA — Low suction temperature
MOP — Maximum evaporation pressure
LOP — Low evaporation temperature
b. — Blocked valve
Ed. — Stepper driver communication
EFS — Stepper motor disconnected/suitable
E — Flash machine parameters
EF — EEPROM operating parameters
HA HA — HACCP HA alarm
HF — HACCP HF alarm
MA — Master communication interrupted
GPE — Custom refrigeration parameters

Official Manual

CAREL MPXone

r — temperature probe anomaly
E — Anomaly temperature probe S1
E — Anomaly temperature probe S2
E — Anomaly temperature probe S3
E — Anomaly temperature probe S4
E — Anomaly temperature probe S5
E6 — Anomaly temperature probe S6
E11 — temperature probe S11 not updated
E12 — temperature probe S12 not updated
E13 — temperature probe S13 not updated
E14 — temperature probe S14 not updated
LO — Low temperature
HI — High temperature
LO2 — Second low temperature
HI2 — Second high temperature
I — Immediate external alarm
d — Retarded external alarm
♪ — Extended open door
Etc — Clock not updated
LSH — Low superheat
LSA — Low suction temperature
MOP — Maximum evaporation pressure
LOP — Low evaporation temperature
b. — Blocked valve
Ed. — Stepper driver communication
dA1 — EVD: anomaly temperature probe S1
dA2 — EVD: anomaly temperature probe S2
AFr — EVD: incompatible firmware
HA HA — HACCP HA alarm
HF — HACCP HF alarm
MA — Communication Main interrupted
GPE — Custom refrigeration parameters
GHI — General function: maximum threshold
GLO — General function: minimum threshold
E. — Persistent display communication

Official Manual