www.DaikinApplied.com 55
IOM 1210-7 • MAGNITUDE
®
MODEL WMC CHILLERS
o
peraTIon
Possible Alarms and Events
There are three types of alarms: faults, problems, and warnings. In addition to these three alarms, there are also "events." See
the following tables for examples of faults, problems, warnings, and events that can occur. Separate tables are shown based on
whether the alarm source is the unit or the compressor.
NOTE:
In the "Alarm Reset" column of the following tables, itallics indicate special alarm conditions or severity. If the "Alarm
Reset" says "Auto-clears," it indicates that the alarm will auto-clear after the condition is resolved and the normal
condition returns.
Fault Alarms
Equipment protection faults cause rapid compressor shutdown. The compressor is stopped immediately (if the compressor was
running).
Table 18: Unit Fault Alarms
Description
HMI Alarm Message
Alarm Reset
Low Motor Current Comp 1
COMPR STOP - Motor Current Low
Auto-clears
Low Motor Current Comp 2
COMPR STOP - Motor Current Low
Auto-clears
No Condenser Water Flow
COMPR STOP - Condenser Water Flow Loss
Auto-clears
No Compressor Stop Comp 1
COMPR STOP - Current High with Compr OFF
Auto-clears
No Compressor Stop Comp 2
COMPR STOP - Current High with Compr OFF
Auto-clears
No Evaporator Water Flow
COMPR STOP - Evaporator Water Flow Loss
Auto-clears
Low Suction pressure Comp 1
COMPR STOP - Suction pressure Low
Auto-clears
Low Suction pressure Comp 2
COMPR STOP - Suction pressure Low
Auto-clears
Leaving Evaporator Water Temperature Sensor Fault Comp 1
COMPR STOP - Evap LWT Sensor Out of Range
Auto-clears
Surge High Suct SH-Running Comp 1
COMPR STOP - Surge Temperature
Auto-clears
Surge High Suct SH-Running Comp 2
COMPR STOP - Surge Temperature
Auto-clears
Expansion Alarm – FAULT (external alarm)
COMPR STOP - Control Fault (External Input)
Auto-clears
Check Valve Fault 1
CHILLER STOP - Check Valve Failure
Locked off (requires local reset)
Check Valve Fault 2
CHILLER STOP - Check Valve Failure
Locked off (requires local reset)
Table 19: Compressor Fault Alarms
Description
HMI Alarm Message
Alarm Reset
Compressor Current Overload Trip #1
COMPR STOP - Motor Current Overload
Auto-clears
Compressor Current Overload Trip #2
COMPR STOP - Motor Current Overload
Auto-clears
Locked off if UL Limit is exceeded
High Motor Temperature Comp 1
COMPR STOP - High Motor Temperature
Auto-clears
High Motor Temperature Comp 2
COMPR STOP - High Motor Temperature
Auto-clears
Locked off if Tripped 3x in 50 min
Overvoltage On Compressor 1
COMPR STOP - Line Voltage High
Auto-clears
Overvoltage On Compressor 2
COMPR STOP - Line Voltage High
Auto-clears
Undervoltage On Compressor 1
COMPR STOP - Line Voltage Low
Auto-clears
Undervoltage On Compressor 2
COMPR STOP - Line Voltage Low
Auto-clears
High Discharge pressure Comp 1
COMPR STOP - Discharge pressure High
Auto-clears
Locked off if Tripped 3x in 50 min
High Discharge pressure Comp 2
COMPR STOP - Discharge pressure High
Auto-clears
Locked off if Tripped 3x in 50 min
High Discharge Temperature Comp 1
COMPR STOP - Discharge Temperature High
Auto-clears
Locked off if Tripped 3x in 50 min
High Discharge Temperature Comp 2
COMPR STOP - Discharge Temperature High
Auto-clears
Locked off if Tripped 3x in 50 min
Starter Fault Compressor 1
COMPR STOP - Compressor Fault
(previously used for WMC general compressor fault)
Reset is dependent on specific alarm
Starter Fault Compressor 2
COMPR STOP - Compressor Fault
(previously used for WMC general compressor fault)
Reset is dependent on specific alarm