Emerson CopelandScroll ZX 401 User Manual page 22

Alarm
Description
Code
E40 High pressure switch alarm
L40 High pressure switch lock
E41 Low pressure switch alarm
High discharge temperature
E44
alarm
Higher discharge tempera-
L44
ture lock
High condensing tempera-
E46
ture alarm
E47 EXV Full-open warning
E48 Less injection warning
High side liquid back
E50
warning
E80 RTC warning
E81 RTF warning
Probe configuration error
E82
alarm
Digital inputs configuration
E83
error alarm
Compressor configuration
E84
error alarm
Injection probe configura-
E85
tion error alarm
L86 EEPROM R/W error lock
22
Possible Reason
Refrigeration system error
High pressure switch is open
High pressure switch alarm happens
frequently
Low pressure switch is open
Discharge temperature is higher
than settings
High discharge temperature alarm
happens frequently
Condensing temperature is higher
than settings
Less refrigerant charge or leakage
Less refrigerant charge or leakage
Suction liquid back or injection too
much
Misc. Error
The time is configured for the new
controller
Communication error between MCU
and unit clock
The same probes are configured
The same digital inputs are config-
ured
Digital compressor and solenoid
valve configuration does not match
EXV and injection configuration do
not match
write/read error into EEPROM
Action
The compressor will be tripped
The compressor will be tripped
and the unit will be locked
The compressor will be tripped
The compressor will be tripped
The compressor will be tripped
and the unit will be locked
No
No
No
No
No
No
No
The related functions will be
disabled
The compressor will not work
EXV will not work
The compressor will tripped and
the unit will be locked
Reset
Automatically when HP switch
closes
Press "Start" >5 sec or manually
power-off and power-on
Automatically when LP switch
closes and time delay
Automatically when discharge
temperature is lower than set-
tings and time delay
Press "Start" >5 sec or manually
power-off and power-on
Automatically when condens-
ing temperature is lower than
settings
Automatically when EXV is not at
full-open
Automatically when PHE super
heat is smaller than settings
Automatically when the differ-
ence of discharge temperature
and condensing temperature is
higher than settings and time
delay
Automatically when finish time
configuration
Automatically when the commu-
nication recovers
Automatically when the probes
are configured correctly
Automatically when the digital
inputs are configured correctly
Manually power off and power on
after the compressor configura-
tion is right
Automatically when injection
probe is configured correctly
Hold "start" button for 5s or
manual power off and on, alarm
will disappear when the com-
munication between MCU and
EEPROM is success.