19
STATUS FUNCTION — This function shows the rotating dis-
play, current status of alarm and alert (diagnostic) codes,
capacity stages, operating modes, chilled water set point, all
measured system temperatures and pressures, analog inputs,
and switch inputs. Refer to Table 13 for a complete description
of the function.
Alarms/Alerts
— Alarms and alerts are messages that one or
more faults have been detected. The alarms and alerts indicate
failures that cause the unit to shut down, terminate an option
(such as reset) or result in the use of a default value such as
a set point. Refer to the Troubleshooting section for more
information.
Up to 10 alarms/alerts can be stored at once. To view them,
press . The control will display the current total num-
ber of alarms/alerts. Use the arrow keys to scroll through the
list. Press the key when needed to view the full description
of an alarm or alert. Press to clear all the alarms. See
Table 14.
When an alarm or alert is stored in the display and the ma-
chine automatically resets, the alarm/alert is deleted. Codes for
safeties which do not automatically reset are not deleted until
the problem is corrected and the machine is reset. To clear
manual reset alarms from the CPM modules, the reset button
on the HSIO bracket must be pressed. Next, switch the LOR
switch to OFF and back to Local or Remote position (default
alarm clearing method). Press and then to
clear the alarm from the PSIO if the default LOR reset function
has been disabled.
General Parameters
— General operating parameters are dis-
played including control mode, run status, CCN status, and the
5 most current alarms. Press to display these and the
other values as shown in Table 13.
Circuit A and B Analog and Discrete Information
— Cir-
cuit A Analog Values can be viewed by pressing and
scrolling down to see current system operating conditions such
as pressures and temperatures. Pressing will bring up
Circuit A Discrete Inputs and Outputs. Scroll down to view the
On/Off status of the compressor(s), loaders, solenoids, and
pumps. Oil switch and feedback inputs are also displayed.
Press and to view the identical analog val-
ues and discrete inputs and outputs for Circuit B. See Table 13
for a complete display.
Unit Analog Parameters and Temperature Reset
— Press
and scroll down to display the unit entering and leav-
ing fluid temperatures as well as the temperature reset signal
and calculated values.
Miscellaneous Inputs and Outputs
— Pressing and
scrolling down will reveal the On/Off status of the condenser
fans (30GX only). Also found here are the Demand Limit set-
tings, pump relay and switch status, and miscellaneous items
such as Heat/Cool and Dual Set Point switch positions. See Ta-
ble 13 for a complete list.
Modes
— The operating modes are displayed to indicate the
operating status of the unit at a given time. See Table 15 for a
complete list of all modes.
To enter the MODES subfunction, press and use
the key to view all current modes of operation. See
Table 16.
Capacity Control
— Pressing , this subfunction
displays the load/unload factor, control point, and leaving wa-
ter temperature. Scrolling down will also reveal the liquid level
sensor values in degrees format.
Dual Chiller
— Pressing will access the dual
chiller control status. This subfunction will display whether or
not the chiller is operating as a Master or Slave, any alarm con-
ditions present for dual chiller control, and lead/lag information
for changeover. Dual chiller control is configured under
.
IMPORTANT: Do not clear the alarms without first
reviewing the full list and investigating and correcting
the cause of the alarms.
ENTER
ENTER
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