Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual
Control Operation
47
Liebert
®
MC
™
Table 17
System alarm information
Alarm ID
Meaning
Possible Cause
Handling Method
000
CAN communication failure
Communication circuit missing or
damaged
Check communication circuit.
Ignore alarm on condensers
without CAN connections
001
Ethernet communication failure
Ethernet hardware or connection
failure
Ignore alarm, Ethernet connection
is not present
002
USB communication failure
USB device or file is damaged.
Replace USB device or file.
003
Data corruption
Memory chip is damaged
Replace PCB board
004
System error
Internal error
Reboot. If reboot fails, consult
factory.
005
Remote shutdown
1. Remote shutdown signal is
available
2. TB38 is not connected
For Cause 1, check the remote
shutdown signal.
For Cause 2, connect TB38.
006
Shutdown due to EC Fan alarm
All fans have failed
Consult factory
007
SPD alarm
SPD damaged
Replace SPD
008
Condenser pressure Sensor 2 failure
Condenser pressure Sensor 1
damaged
Replace condenser pressure
Sensor 1
009
Condenser pressure Sensor 2 failure
Condenser pressure Sensor 2
damaged
Replace condenser pressure
Sensor 2
010
Condenser pressure 1 high alarm
High pressure: Fan failure,
clogged coils.
Low pressure: Loss of charge
High-pressure alarms: Fix fan and
clean coil.
Low-pressure alarms: Check for
refrigerant leak.
011
Condenser pressure 2 high alarm
012
Condenser pressure 1 low alarm
013
Condenser pressure 2 low alarm
014
EC Fan speed mode maximum must
be overridden due to condenser
pressure 1 high
Condenser pressure 1 high
No action is needed.
015
EC Fan speed mode maximum must
be overridden due to condenser
pressure 2 high
Condenser pressure 2 high
No action is needed.
016
Ambient temperature sensor failure
Ambient temperature sensor
damaged
Replace ambient temperature
sensor
017
Ambient temperature high alarm
Ambient temperature high
No action is needed.
018
Ambient temperature low alarm
Ambient temperature low
No action is needed.
019
Condenser temperature Sensor 2
failure
Condenser temperature Sensor 2
damaged
Replace condenser temperature
Sensor 1
020
Condenser temperature Sensor 2
failure
Condenser temperature Sensor 2
damaged
Replace condenser temperature
Sensor 2
021
Condenser temperature 1 high alarm
High temperature: Fan failure,
clogged coils.
Low temperature: Consult factory
High-temperature alarms: Fix fan
and clean coils.
Low-temperature alarms: consult
factory.
022
Condenser temperature 2 high alarm
023
Condenser temperature 1 low alarm
024
Condenser temperature 2 low alarm
025
EC Fan speed mode maximum must
be overridden due to refrigerant
temperature 1 high
Refrigerant temperature 1 high
No action is needed.
026
EC Fan speed mode maximum must
be overridden due to refrigerant
temperature 2 high
Refrigerant temperature 2 high
No action is needed.