3
Control Panel Keys
Status
Key - (refer to Section 4)
This key provides a display of the current operational
and/or fault status of the chiller or individual refrigerant
systems.
Display/Print
Keys - (refer to Section 5)
These keys allow control panel display or remote
printout of both current real-time operating data as well
as fault history data from recent safety shutdowns.
Entry
Keys - (refer to Section 6)
These keys are used for entering data required for
programming the chiller. The keys are also used for
scrolling through displays.
Setpoints
Keys - (refer to Section 7)
These keys are used for display and programming: the
local and remote chilled liquid temperature setpoints;
the operating schedule for the chiller; the chiller
operational settings and limits.
Unit
Keys - (refer to Section 8)
These keys allow the unit options and clock to be set.
4
Status Key
Pressing the ‘STATUS’ key displays the unit operating
status. The messages displayed will include running
status, cooling demand, fault status, external cycling
device status, load limiting and anti-recycle/coincident
timer status. The display will be a single message
relating to the highest priority message as determined
by the microprocessor. Status messages fall into the
categories of General Status and Fault Status.
The following messages can be displayed when the
'Status' key is pressed. In the case of messages which
apply to individual systems, system 1 and system 2
messages will both be displayed and may be different.
Following each message is an explanation of its
meaning:
4.1
General Status Messages
The unit 'ON/OFF' switch on the control panel is in the
'OFF' position which will not allow the unit to run.
An Integrated Systems Network (ISN) or Building
Automation System (BAS) has turned the unit off.
The 'DAILY/HOLIDAY SCHEDULE' programmed is
keeping the unit from running.
A remote start/stop contact, terminals 13 and 14 (-ARB
circuit board on YLAA and YLAE units) and 13 and 51
(-XTBC1 on YCWL/YCRL units), is open and the unit will
not run.
The flow switch, terminals 13 and 18 (-ARB circuit board
on YLAA and YLAE units) and 13 and 14 (-XTBC1 on
1
-
15
Form 201.26.OI1(11/09)
OPER DATA
SETPOINTS
SCHEDULE/
ADVANCE DAY
HISTORY
PROGRAM
Unit
Setpoints
Entry
Display/Print
ENTER
/ADV
OPTIONS
CLOCK
STATUS
S Y S
1
COMP S RUN
2
S Y S
2
COMP S RUN
1
U N I
T
S W I
T C H
O F F
S H U T D O W N
R E M O T E
C O N T R O L L E D
S H U T D O W N
D A I
L Y
S C H E D U L E
S H U T D O W N
R E M O T E
S T O P
N O
R U N
P E R M I
S S I
V E
F L O W
S W I
T C H
N O
R U N
P E R M I
S S I
V E
