Emerson COPELAND ZX Series - Alarm Codes: System and Miscellaneous Errors; Refrigeration System Errors

26
2525
Alarm
Code
Description Possible Reason Action Reset
Refrigeration system error
E40 High pressure switch alarm High pressure switch is open The compressor will be tripped
Automatically when HP switch
closes
L40 High pressure switch lock
High pressure switch alarm happens
frequently
The compressor will be tripped
and the unit will be locked
Press “Start” >5 sec or manually
power-off and power-on
E41 Low pressure switch alarm Low pressure switch is open The compressor will be tripped
Automatically when LP switch
closes and time delay
E44
High discharge temperature
alarm
Discharge temperature is higher
than settings
The compressor will be tripped
Automatically when discharge
temperature is lower than set-
tings and time delay
L44
Higher discharge tempera-
ture lock
High discharge temperature alarm
happens frequently
The compressor will be tripped
and the unit will be locked
Press “Start” >5 sec or manually
power-off and power-on
E46
High condensing tempera-
ture alarm
Condensing temperature is higher
than settings
No
Automatically when condens-
ing temperature is lower than
settings
E47 EXV Full-open warning Less refrigerant charge or leakage No
Automatically when EXV is not at
full-open
E48 Less injection warning Less refrigerant charge or leakage No
Automatically when PHE super
heat is smaller than settings
E50
High side liquid back
warning
Suction liquid back or injection too
much
No
Automatically when the differ-
ence of discharge temperature
and condensing temperature is
higher than settings and time
delay
Misc. Error
E80 RTC warning
The time is congured for the new
controller
No
Automatically when nish time
conguration
E81 RTF warning
Communication error between MCU
and unit clock
No
Automatically when the commu-
nication recovers
E82
Probe conguration error
alarm
The same probes are congured No
Automatically when the probes
are congured correctly
E83
Digital inputs conguration
error alarm
The same digital inputs are cong-
ured
The related functions will be
disabled
Automatically when the digital
inputs are congured correctly
E84
Compressor conguration
error alarm
Digital compressor and solenoid
valve conguration does not match
The compressor will not work
Manually power off and power on
after the compressor congura-
tion is right
E85
Injection probe congura-
tion error alarm
EXV and injection conguration do
not match
EXV will not work
Automatically when injection
probe is congured correctly
L86 EEPROM R/W error lock write/read error into EEPROM
The compressor will tripped and
the unit will be locked
Hold “start” button for 5s or
manual power off and on, alarm
will disappear when the com-
munication between MCU and
EEPROM is success.