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MICRO PANEL
Fault Shutdowns History
If the FAULT SHUTDOWNS History is selected, the
following screen will be displayed:
FAULT HIST XX 18-JUN-20004 10:34:58 AM
YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
XX is the FAULT HISTORY shutdown number. The
display will provide the date, time, and a description of
the specific type of fault that occurred (YYY....).
The operator can view any of the stored 10 fault history
buffers. History buffer number 1 provides the most
recent safety shutdown information and buffer number
10 is the oldest safety shutdown information saved. The
◄ and ► arrow keys allow scrolling between each of
the FAULT HIST buffers 1-10. The ▲ (UP) and ▼
(DOWN) arrow keys can be used to scroll forwards and
backwards through the data in a specific history buffer,
once it is displayed.
There is a large amount of data provided under each
history. Rather than scroll sequentially through the data
in a history, which is possible using the ▼ arrow key,
the use of a combination of the ◄, ►, ▲‚ and ▼ arrow
keys allows fast scrolling to specific data the user desires
to view. To use this feature, the user needs to be aware
the ◄ and ► arrow keys allow scrolling to the top of
the data subgroups. Once a specific history is selected,
the history data is divided under the subgroups of Unit
Data, VSD Data, System Data, Hours/Starts, Setpoints,
Options, and Program data. The ◄ and ► arrow keys
allow moving to the first display under the next or pre-
vious subgroup at any time. Once the first display of a
subgroup is displayed, the ▲‚ and ▼ arrow keys allow
scrolling though the data in the subgroup. The ▼ arrow
key allows scrolling though the data from first to last.
When the last piece of data is displayed, the next press
of the ▼ arrow key scrolls to the first piece of data in
the next subgroup. The ▲ arrow key allows going to
the previous display.
Listed below is a description of the fault data displays
and their meaning. Data will be displayed in a specific
order starting with the Status Display (System Faults
only), Fault Display, All Fault Display, Unit Data, VSD
Data, System Data, Operating Hours/Starts, Setpoints,
Options, and Program Values at the time of the fault.
238
HISTORY KEY
Status Fault Type
SYS X COMPRESSOR RUNNING
SYS X YYYYYYYY HIGH DIFF OIL PRESSURE
This message indicates the type of system fault. This
screen is skipped if a UNIT Fault caused the shut-
down.
Unit Fault Type
UNIT FAULT
LOW AMBIENT TEMP
This message indicates the type of unit fault. This screen
is skipped if a SYSTEM Fault caused the shutdown.
All Fault Data
FAULT HIST XX ALL FAULTS ZZ OF WW
YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
The ALL FAULT display indicates whether a fault
occurred while the unit is shutting down on another
fault.
If a control panel fault occurred while the unit is shutting
down on a VSD fault before it is reset, the control panel
fault is an ALL FAULT of the VSD fault.
If another VSD fault occurs while the unit is shutting
down on a VSD fault, the next VSD fault will be regis-
tered as an ALL FAULT of the VSD fault.
If a VSD fault occurs during the ramp down shutdown
of a control panel fault, the VSD fault is registered as a
new fault, not an ALL FAULT
XX is the history number, YYY is the ALL FAULT
description, ZZ is the ALL FAULT number and WW
is the total number of All Faults for the current his-
tory. Sometimes, multiple faults may occur during the
shutdown and multiple displays will be observed when
scrolling through the data using the ▼ arrow. In most
cases, the ALL FAULT display will indicate NONE.
The ALL FAULT display will only indicate the cause
of the fault. No additional chiller information will be
displayed under the ALL FAULT, since a snapshot of all
chiller data was taken at the time of the first fault.
FORM 201.21-NM1 (1223)
JOHNSON CONTROLS
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