Honeywell W7750A ユーザーズマニュアル
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—1
50
NOTE:
The node can be reset by switching the node to
MANUAL and then to the normal operating mode
(see Fan Operation in Appendix B).
MANUAL and then to the normal operating mode
(see Fan Operation in Appendix B).
Also, the Excel 10 variables, AlarmLogX where X is 1 through
5, that store the last five alarms to occur in the controller, are
available. These points can be viewed through XBS or
E-Vision.
5, that store the last five alarms to occur in the controller, are
available. These points can be viewed through XBS or
E-Vision.
Certain alarm conditions are suppressed conditionally as
follows:
follows:
Broadcasting the Service Message
The Service Message allows a device on the L
ON
W
ORKS
Bus
to be positively identified. The Service Message contains the
controller ID number and, therefore, can be used to confirm
the physical location of a particular Excel 10 in a building.
controller ID number and, therefore, can be used to confirm
the physical location of a particular Excel 10 in a building.
There are three methods of broadcasting the Service
Message from an Excel 10 W7750 Controller. One uses a
hardware service pin button on the side of the controller (see
Fig. 41). The second uses the wall module pushbutton (see
Fig. 43 and 44). By pressing the wall module pushbutton for
more than four seconds, the controller sends out the Service
Message. The third involves using the PC Configuration tool,
as follows.
Message from an Excel 10 W7750 Controller. One uses a
hardware service pin button on the side of the controller (see
Fig. 41). The second uses the wall module pushbutton (see
Fig. 43 and 44). By pressing the wall module pushbutton for
more than four seconds, the controller sends out the Service
Message. The third involves using the PC Configuration tool,
as follows.
When an Assign ID command is issued from the
commissioning tool, the node goes into the
SERVICE_MESSAGE mode for five minutes. In the
SERVICE_MESSAGE mode, pressing the Occupancy
Override button on the remote wall module (refer to Fig. 43
and 44 for override button location) causes the Service
Message to be broadcast on the network. All other functions
are normal in the SERVICE_MESSAGE mode. Even if an
Excel 10 W7750 Controller does not have an Override button
connected, it can broadcast the Service Message on the
network by temporarily shorting the Controller Bypass Input
terminal to the Sensor Ground terminal on the W7750A,B,C
(short terminals 3 and 5).
commissioning tool, the node goes into the
SERVICE_MESSAGE mode for five minutes. In the
SERVICE_MESSAGE mode, pressing the Occupancy
Override button on the remote wall module (refer to Fig. 43
and 44 for override button location) causes the Service
Message to be broadcast on the network. All other functions
are normal in the SERVICE_MESSAGE mode. Even if an
Excel 10 W7750 Controller does not have an Override button
connected, it can broadcast the Service Message on the
network by temporarily shorting the Controller Bypass Input
terminal to the Sensor Ground terminal on the W7750A,B,C
(short terminals 3 and 5).
The commissioning tool is used to perform the ID Assignment
task (see the E-Vision User’s Guide, form 74-2588).
task (see the E-Vision User’s Guide, form 74-2588).
Fig. 41. Location of the Service Pin Button.
W7750 Controller Status LED
The LED on the front and center of a W7750 Controller
provides a visual indication of the status of the device. See
Fig. 42. When the W7750 receives power, the LED should
appear in one of the following allowable states:
provides a visual indication of the status of the device. See
Fig. 42. When the W7750 receives power, the LED should
appear in one of the following allowable states:
1.
Off—no power to the processor.
2.
Continuously On—processor is in initialized state.
3.
Slow Blink—controlling, normal state.
4.
Fast Blink—when the Excel 10 has an alarm condition.
LOSS_OF_AIR_FLOW
6
The Fan Status DI indicates that there is no air flow when the node is
commanding the fan to run. The control is shut down and disabled until power is
cycled or the node is reset. See NOTE below. The alarm is not issued until
FanFailTime seconds have elapsed since the loss-of-flow condition was first
reported
commanding the fan to run. The control is shut down and disabled until power is
cycled or the node is reset. See NOTE below. The alarm is not issued until
FanFailTime seconds have elapsed since the loss-of-flow condition was first
reported
DIRTY_FILTER
7
The pressure drop across the filter exceeds the limit and the filter requires
maintenance. The control runs normally.
maintenance. The control runs normally.
SMOKE_ALARM
8
The smoke detector has detected smoke and the node has entered an
emergency state.
emergency state.
IAQ_OVERRIDE
9
The indoor air quality sensor has detected that the indoor air quality is less than
the desired standard and additional outdoor air is being brought into the
conditioned space.
the desired standard and additional outdoor air is being brought into the
conditioned space.
LOW_LIM_ECON_CLOSE
10
The economizer has to close beyond the minimum position to prevent the
discharge air temperature from going below the discharge temperature low limit.
discharge air temperature from going below the discharge temperature low limit.
Table 12. Excel 10 Alarms. (Continued)
Name of alarm or error bit
Alarm type
number
Meaning of alarm code or error bit
M10094
SERVICE
PIN
BUTTON
PIN
BUTTON