York YCAL0043E Series, Установка, эксплуатация и обслуживание

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YORK INTERNATIONAL
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FORM 150.62-NM7 (103)
The Microprocessor Board energizes on-board relays
to output 120VAC to mo tor contactors, so le noid valves,
etc. to con trol system operation. It also energizes solid
state relays to output 24VAC to the EEVs if installed.
UNIT SWITCH
A UNIT ON/OFF switch is just un der neath the key pad.
This switch allows the op er a tor to turn the entire unit
OFF if desired. The switch must be placed in the ON
position for the chiller to operate.
DISPLAY
The 40 Character Display (2 lines of 20 char ac ters)
is a liquid crystal display used for dis play ing system
pa ram e ters and operator mes sag es.
The dis play in conjunction with the keypad, al lows the
operator to display system operating pa ram e ters as well
as access programmed in for ma tion al ready in mem o ry.
The display has a light ed background for night view ing
and for view ing in direct sunlight.
When a key is pressed, such as the OPER DATA key,
system pa ram e ters will be dis played and will remain
on the display until another key is pressed. The sys tem
pa ram e ters can be scrolled with the use of the up and
down arrow keys. The display will update all in for ma tion
at a rate of about 2 seconds.
Display Mes sag es may show characters in di cat ing
“great er than” (>) or “less than” (<). These char ac ters
indicate the actual values are greater than or less than
the limit values which are being displayed.
KEYPAD
The 12 button non-tactile keypad allows the user to re-
trieve vitals system parameters such as system pres-
sures, temperatures, compressor running times and
starts, option information on the chiller, and system
setpoints. This data is useful for mon i tor ing chiller op-
er a tion, di ag nos ing potential prob lems, trou ble shoot ing,
and com mis sion ing the chiller.
It is es sen tial the user be come fa mil iar with the use of the
key pad and display. This will allow the user to make full use
of the capabilities and diagnostic
features avail able.
BATTERY BACK-UP
The Microprocessor Board contains a Real Time Clock
integrated circuit chip with an in ter nal battery backup.
The purpose of this battery backup is to assure any
pro grammed values (setpoints, clock, cutouts, etc.) are
not lost during a power failure regardless of the time
in volved in a power cut or shut down period.
UNIT STA TUS
Pressing the STATUS key will enable the op er a tor to
determine current chiller op er at ing status. The mes-
sag es dis played will include running status, cooling
de mand, fault status, external cycling device status,
load limiting and anti-recycle/coincident timer status.
The display will be a single mes sage relating to the
highest priority mes sage as determined by the micro.
Status mes sag es fall into the categories of General
Status and Fault Sta tus.
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