Black Box CRDX-A-FS-12KW Manuale Utente
724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 51
Chapter 4: E2 Controller
Operators who are allowed access to the Service menu (Level 2) for example, must know the password to enter that level. If the
entered password equals or exceeds the level requested during a given session, the operator is allowed to access the requested
loop. For example, if the entered password allows access to Level 2 and the Control menu (Level 1) is requested, access will be
allowed. If the entered password authority level is lower than the level requested, the words “WRONG PASSWORD” will appear
for several seconds at the bottom of the screen.
entered password equals or exceeds the level requested during a given session, the operator is allowed to access the requested
loop. For example, if the entered password allows access to Level 2 and the Control menu (Level 1) is requested, access will be
allowed. If the entered password authority level is lower than the level requested, the words “WRONG PASSWORD” will appear
for several seconds at the bottom of the screen.
4.2.6.2 Wrong Password
Figure 4-11. Wrong password.
The “WRONG PASSWORD” message is displayed any time an incorrect password has been entered and the Enter
key has
been pressed. If the “Wrong Password” message appears, pressing the Enter
key will return the operator to the “Enter
Password” field.
A requested menu screen is displayed any time a valid password has been entered and the Enter key is pressed.
NOTE: If you request the Control menu and enter the Service menu password, you are granted access to both.
4.2.6.3 Setting the Passwords
The initial passwords are set by the factory to 0001 for the Control menu (Level 1) and to 0002 for the Service menu (Level 2).
Upon entering the Service>Save Cfg menu, the operator can change the passwords for the menus. If changed, from that point
on, only personnel who know the password can access that menu.
Upon entering the Service>Save Cfg menu, the operator can change the passwords for the menus. If changed, from that point
on, only personnel who know the password can access that menu.
4.3 System Operation
CAUTION
Ensure all system hookups to the air conditioner(s) are completed and that power is available.
1. Turn the main power disconnect switch for the A/C unit to “On.” Upon applying control power, the controller display function
keys illuminate, and the controller begins conducting internal diagnostics to confirm functionality. The controller monitors the
alarm inputs and alarm logic to determine if it’s safe to start the unit. After an initialization period of about 30 seconds, the
Main screen is displayed.
alarm inputs and alarm logic to determine if it’s safe to start the unit. After an initialization period of about 30 seconds, the
Main screen is displayed.
The Main Screen is a status screen displaying the current date and time. It displays the current control temperature and relative
humidity and the current temperature and dew point as calculated from the T/H sensor. It also displays the current system
operating mode(s).
humidity and the current temperature and dew point as calculated from the T/H sensor. It also displays the current system
operating mode(s).
2. If the controller is configured for Automatic On operation (standard), a status message “Unit On” then appears in the display.
Figure 4-12. Main screen.
3. If the status message “OFF–Manual Restart Req” appears instead of “Unit On,” the Automatic On feature may not be enabled.
In this case, turn the air conditioner on by pressing the Enter key.