Daikin WMC Installation, Operation And Maintenance Manual page 44

Alarm History Screen
The Alarm History Screen (Figure
Trend History Screen by pressing the HISTORY button again.
Figure 50: Alarm History Screen
There are three types of alarms:
1. Fault (Red)- This is an equipment protection alarm that
shuts a unit or compressor off.
2. Problem (Yellow)- This is a limit alarm that limits
compressor loading in response to an out-of-normal
condition. If the condition that caused a limit alarm is
corrected, the alarm light will be cleared automatically.
3. Warning (Dark Blue)- This is a notification only. The
controller takes no action in response to this alarm.
The Alarm History Screen displays a maximum of eight alarms
with the most current alarm listed on top. Each alarm displays
the date stamp, action taken, and the cause of the alarm. As
shown in Figure 51, clicking on a listed alarm will bring up more
details about that particular alarm at the top of the screen.
Figure 51: Alarm History Screen with Alarm Detail
IOM 1210-1 • MAGNITUDE
50) is accessed from the
MODEL WMC CHILLERS
®
Although the Alarm History Screen only displays the eight most
current alarms, a record of ALL alarms is stored in the OITS
PC. Note that this record may include alarms that occurred
when the chiller was in the factory. This record is maintained
even if the OITS PC is powered off. When the OITS is powered
back on, the last eight alarms will show back up on the Alarm
History Screen and all alarm history will still be available for
download. (The download process is described next.) If an
alarm occurs and is cleared when the OITS PC is powered off,
it will not be recorded in the alarm history.
The Alarm History Screen can be used to download the trend
history (Figure 49) or the alarm history
order to download the trend or alarm history, first insert a USB
drive into the left side of the OITS PC (see
5 if help is needed to identify the OITS PC). The OITS PC
will have two USB ports. Insert the USB drive into the USB port
closer to the front of the OITS PC.
NOTE: In order to prevent viruses from being transferred
from the USB drive to the OITS, it is important that
a clean USB drive is used. Do NOT use a USB drive
that contains any auto-executable files.
If a directory screen opens when the USB drive is inserted,
close out of that screen and continue with the directions
instructed below.
To Download Trend History:
• Make sure that the "History File" text field on the right
side of the Alarm History Screen shows a date. If it shows
"ALARMS" rather than a date, press either the PREV
or NEXT button. (Pressing the PREV button when the
"History File" text field shows "ALARMS" will bring up
yesterday's date. Pressing the NEXT button when the
"History File" text field shows "ALARMS" will bring up
today's date.)
• Use the PREV or NEXT button to change the date in the
"History File" text field to the desired date. The dates will
stop scrolling when the last file in that direction has been
reached. (The OITS PC will store 30 days of history at a
minimum. More days might be stored depending on the
trend history file sizes. The OITS PC will automatically
delete old trend history files as needed to make room for
new trend history files.)
• Take note of the file size of that date's history by viewing
the "Size" text field. Press the COPY to USB button and
watch the file size in the "Size" text field count up to the
noted file size. Once this text field has stopped counting
and has reached its actual file size, the download of that
file to the USB is complete.
• Repeat this process for each desired day of trend history.
Each day must be downloaded individually. It is not
possible to download multiple days of trend history at
once.
42
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peraTIon
(Figure 50) via USB. In
Figure 3 on page
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