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Operator
Settings
Service
Settings
Service
Tests
Diagnostics
Diagnostics Menu
The Diagnostics Menu contains both active and historical
information. The menu contains the ability to clear active
diagnostics, historic diagnostics, and purge diagnostics as
individual groups. In order to alert the machine operator
that a new diagnostic occurred the CLD would
automatically go to this menu and display certain
messages as explained below.
New Diagnostic Display sequence.
When a new diagnostic is detected the display will reset to
the diagnostic menu. A “one-time” screen display will
inform the user what the new diagnostic is.
This “one-time” screen will vary depending on the type of
diagnostic detected. The two major categories of
diagnostics are those which are informational warning only
(IFW), and those which have resulted in machine
shutdown; machine shutdown manual reset required
(MMR) and machine shutdown auto reset (MAR).
The “one-time” IFW information screen would be:
“A New Warning has been Detected”
“Press (Next) for more”
The “one-time” MMR/MAR diagnostic screen would be:
“ A Machine Shutdown Has Occurred”
“Press (Next) for More”
Pressing (Next) will display “Press (Next) to display
operating mode at time of last diagnostic” and the previous
“one-time” screen will no longer exist.
The diagnostics menu (p.60) illustrates an overview of the
diagnostic key screens.
Header Screen:
“Active and Historic Diagnostics”
“Press (Next)(Previous) to Continue
1. If there are no diagnostics present, the following screen
will be displayed under the Diagnostics Group heading
screen:
“No Diagnostic Present”
Press (NEXT)(Previous) to Continue
2. Single Active diagnostics
2.1 If there are any diagnostics present, the following 3
screens are displayed sequentially when the Next key is
pressed. The first screen is:
“Diagnostics Report Follows”
Press (Next) for More
2.2. The second screen is
Press (Next) to Display Operating Mode
At Time of Last Diagnostic
2.3. The third screen will be the chiller operating mode
display that was present when the most recent diagnostic
occurred.
3. Multiple Active Diagnostics.
If there are one or more diagnostics present, the following
displays will be inserted into the display sequence.
Diagnostics will be listed in order of occurrence from
newest to oldest. Diagnostics will be displayed on 2
screens. The two screens will vary slightly depending on
whether the diagnostic is active or historic.
3.1. The first active diagnostic screen will be:
(Sequence #) (Diagnostic)
(Next) Diagnostic Type)
The sequence number will run from 1 through n (n <= 20)
and number the diagnostics sequentially where the most
recent diagnostic is sequence number [01].
The possible replacements for [diagnostic type] are:
• Warning Only - Reset Not Reqd (Applies to all IFW
diagnostics).
• Unit Shutdown - Reset Reqd (Applies to all MMR
diagnostics).
• Unit Shutdown - Automatic Reset (Applies to all MAR
diagnostics).
3.2. The second active diagnostic display screen will
contain the diagnostic sequence number, a time and date
stamp, and a help message suggesting possible service
procedures. The second active diagnostic display screen
will be:
(SN) Occurred at HH: MM XM Oct 23, 199X
(Help Message)
The time will be displayed as HH: MM am/pm.
(HH=Hours, MM=minutes, xm=AM or PM The date will be
displayed as month date, - year.
Depressing the next key will advance the display to the next
diagnostic in the sequence.
4. Historic Diagnostics
4.1 The first historic diagnostic screen will be:
(Sequence Number) (Diagnostic)
Historic Only, Press (Next) For More
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