Daikin Magnitude WME Series, Installation, Operation And Maintenance Manual, Page: 46 / 60

IOM 1266-2 • MAGNITUDE
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MODEL WME CHILLERS 46 www.DaikinApplied.com
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Alarms
The Alarm information ( Figure 63 and Figure 64 ) is accessed
by touching the ALARM icon at the bottom of the HMI and then
the Active or History tabs at the top of the screen. As noted on
page 29, an active alarm will turn the icon flashing red.
There are two types of alarms:
1. Critical Alarm (Red) - This is an equipment protection
alarm that will shut a unit or compressor off if not
corrected.
2.
Warning (Yellow)
- This alarm limits compressor loading
in response to an out-of-normal condition or may only
be a notification to indicate that the condition requires
attention. This alarm may not cause a shutdown. If the
condition that caused a warning is corrected, the alarm
light will be cleared automatically.
The Alarm Active and History Screens display a maximum of
18 alarms for the current date with the most current alarms
listed on top. Each alarm displays the date stamp, action taken,
and the cause of the alarm. See the Alarm tables starting
on page 48 for specifics on alarms that may occur. Alarm
history data is held for 365 days as shown on the Interface tab
in Figure 60 .
Clearing an Alarm
There are two different indicators that the chiller will generate
when conditions arise that are affecting the chiller operations.
Warnings are indicated in yellow on the HMI and communicate
that the chiller should be serviced but allow the chiller to keep
running. Warnings cannot be cleared manually and will be
cleared automatically when the issues has been resolved.
Critical Alarms will always shutoff the chiller and Critical
Alarms that do not require external intervention may attempt
to auto-clear once conditions return to normal (Pressure
and Temperature Alarms). Auto-cleared Critical Alarms will
be yellow and will be displayed as warnings unless there
has been 3 within the hour. After 3 alarms occur within the
hour, the Critical Alarm will be displayed as a Critical Alarm
by being indicated in Red on the HMI and will prevent the
chiller from running until manually cleared at the HMI or via
the BAS. Critical Alarms that require external intervention
(Communication and Sensor Alarms) will immediately show up
as Red Alarms on the HMI and prevent the chiller from running
until manually cleared at the HMI or via the BAS, after the
condition has been resolved.
Repeated manual clearing of Critical Alarms via the HMI or the
BAS without resolving the cause of the Alarm may damage the
chiller and void the chiller warranty.
Although the Alarm History Screen only displays the most
current alarms, a record of ALL alarms is stored in the Unit
Control Processor. Note that this record may include alarms
that occurred when the chiller was not yet fully assembled in
the factory. This record is maintained even if the Unit Control
Processor is powered off. When the HMI is powered back on,
the last 18 alarms for the current date will show on the Alarm
History Screen and all alarm history will still be available for
download.
Figure 63: Active Alarm View Screen