YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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SECTION 8 - MICROPANEL OPERATING HOURS/ START COUNTER KEY 104 OPERATING HOURS / START COUNTER KEY Compressor operating hours and compressor starts are displayed with a single key press. The maximum value for both hours and starts is 99,999, at which point they will roll over to 0. A single display is available under this key and is displayed below. HOURS 1=XXXXX, 2=XXXXX START 1=XXXXX, 2=XXXXX ` LD10605 FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 JOHNSON CONTROLS
FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 HISTORY KEY History Key Operation The HISTORY key provides the user access to many unit and system operating parameters captured at the instant a unit or system safety (fault) shutdown occurs. The history buffer will also capture system data at the time of normal shutdowns such as cycling shutdowns. When the HISTORY key is pressed the following screen is displayed: HISTORY CHOOSE HISTORY TYPE ◄ ► XXXXXXXXXXXXXXXXXXXXXXXXXXXX The ◄ and ► (ARROW) keys allow choosing between NORMAL SHUTDOWNS and FAULT SHUT- DOWNS. “Fault” shutdowns provide information on safety shutdowns, while “Normal” shutdowns provide chiller cycling information on temperature (demand), cycling, remote, system switch, etc., shutdowns that are non-safety related shutdowns. Once the selection is made, the � (ENTER) key must be pressed to enter the selection. Normal Shutdowns History If the NORMAL SHUTDOWNS History is selected, the following screen will be displayed: NORM HIST XX 18-JUN-20004 10:34:58 AM YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY HISTORY KEY SECTION 8 - MICROPANEL JOHNSON CONTROLS 105 LD10605 XX is the normal shutdown number. The display will provide date and time of the shutdown and the reason for the cycling shutdown (YYY….). The operator can view any of the stored 20 single display normal shutdown history buffers. History buffer number 1 provides the most recent shutdown information and buffer number 20 is the oldest safety shutdown information saved. The ◄ and ► (ARROW) keys allow scrolling between each of the history buffers. The ► (ARROW) key scrolls to the next normal history shutdown and the ◄ (ARROW) key scrolls to the previous normal history shutdown. The following display will typically be displayed on a normal shutdown due to shutdown on lack of cooling demand. NORM HIST XX 18-JUN-20004 10:34:58 AM SYS X COOLING DEMAND SHUTDOWN 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 8
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AIR-COOLED SCREW LIQUID CHILLERS IN
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YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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