YORK INTERNATIONAL
52
FORM 201.25-NM1 (302)
Micropanel
5.1 GENERAL
The print keys provide access to two sets of information
either locally on the panel display or, if an optional printer
is connected, remotely as hard copy printouts.
The operating data (‘OPER DATA’) key provides a real-
time list of system operating data and programmed set-
tings. The ‘HISTORY’ key provides a comprehensive
list of operating data and programmed settings ‘at the
instant of fault’ on each of the last six faults (local dis-
play) or three faults (remote printout) which occurred
on the chiller.
5.2 OPER DATA KEY
When no remote printer is connected, pressing the
‘OPER DATA’ key allows the user to scroll through
information, on the 40 character display, which is not
directly available from the display keys on the panel.
If a remote printer is connected, pressing the
‘OPER DATA’ key causes a snapshot to be taken of
system operating conditions and of the user program-
ming selections. The data is stored in temporary
memory, then transmitted from the microprocessor to
the remote printer. As the data is transmitted it is erased
from the memory.
Information available using the ‘OPER DATA’ key is de-
scribed in the following sections. In example displays ‘#’
is used to indicate system number where appropriate.
5.3 OPER DATA -– LOCAL DISPLAY MESSAGES
When the ‘OPER DATA’ key is pressed, the following
message appears:
Repetitively pressing the ‘
’ keys will scroll through
the common (whole chiller) data and individual sys-
tem data information displays.
Common Data:
This message shows the time remaining on the load
and the unload timers.
These timers constantly recycle and are used in con-
junction with ‘RATE CONTROL’ and ‘TEMPERA-
TURE DEVIATION FROM SETPOINT’ to determine
when loading should occur.
The upper message gives the difference (error) between
actual leaving chilled liquid temperature and the pro-
grammed target temperature.
The lower message gives the rate of change of the
chilled liquid leaving temperature in degrees per
minute. A minus sign (-) indicates falling temperature.
No sign indicates rising temperature.
This message advises which system is programmed as
the lead.
29023a
5. PRINT KEYS
O P E R A T I N G
D A T A
D I S P L A Y S
L O A D
T I M E R
1 0
S E C
U N L O A D
T I M E R
0
S E C
T E M P
E R R O R
0 0 . 5
°
F
T E M P
R A T E
-
0 . 9
° F/ M
L E A D
S Y S T E M
I S
S Y S T E M
N U M B E R
#
