The following are included on the controller:
Upper Display:
Shows the process variable (PV) mode or alternates between the display and set
values for each item. If an alarm is triggered, the display changes. It alternates between an alarm
code and the normal information.
Lower Display:
Shows the set point or measured variable or current transformer (SP/MV/CT) value.
Or it alternates between the display and set values for each item.
Mode Indicator:
Lights to indicate which operational mode is active for the unit. The available
lights are:
1.
Man:
If the MAN light is not lit, the unit is in AUTO mode. This is the manufacturer’s
recommended setting. If the MAN light is lit, it indicates that the unit is operating in MANUAL
mode. (This mode is available only for the residential hot water use.) The manufacturer does
not recommend operating the unit in MANUAL mode.
2.
Remote Set Point (RSP):
Indicates that the controller is using the remote set point
information.
3.
EV1, EV2, EV3:
Indicates that one or more event relays are on.
4.
OT1, OT2:
Indicates that one or more control output is on.
Multi-Status Display (MS):
Is lit when the unit is in READY mode or when an alarm is triggered.
It functions as a MV graph, a Digital Input (DI) monitor, and an internal event monitor as well. At
times, the display may flash.
Mode Key:
Press and hold the key to choose from any of eight operational modes:
•
0:
: Mode key does not operate
•
1:
Choose between AUTO or MANUAL mode (available only for residential hot water control valve
controllers)
•
2:
Choose between RUN or READY mode
•
3:
Start or Stop Auto Tuning (AT) control mechanism
•
4:
Choose the Local Set Point (LSP) mode
•
5:
Releases all Digital Output latches
•
6:
Choose LSP or RSP mode
•
7:
Select between ON or OFF communication
Display Key:
Changes the display item in the operation display mode.
Movement Keys:
Serve several purposes. The up or down arrow keys can increase or decrease
the numeric value of a digit in a display. The right arrow key shifts the position of the digit in the
display. The up or down keys can also be used to change the bank or display item.
Enter Key:
Press to begin changing the settings in the display (numbers begin to flash). Press again
to finalize the changes (numbers change from flashing to steady).
Para Key:
Press for 2 seconds or longer to change between the operation display mode and the
setup display mode.
Loader Connector:
Allows the connection to a PC. Requires the dedicated cable that is supplied
with the Smart Loader Package.
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Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
