Carel uC2SE, User Manual

Page: 8 / 76

8
ENGLISH
μC 2 SE - +030220426 - rel. 2.1 - 09.06.2010
1.2.3 Functions associated with the buttons
button unit status button press
I Loading default values press at power ON
Go up a sub-group inside the programming area, until exiting (saving changes to EEPROM) press once
In the event of alarms, mute the buzzer (if present) and deactivate the alarm relay press once
L Access the direct parameters press for 5 s
Select item inside the programming area and display value of direct parameters/confi rm the changes to the parameters press once
I + L Program parameters afters entering password press for 5 s
J Select top item inside the programming area press once or press and hold
Increase value press once or press and hold
Switch from standby to chiller mode (P6=0) and vice versa press for 5 s
Provides immediate access to the condenser and evaporator pressure and temperature probes and DTE, DTC1-2 press once
K Select bottom item inside the programming area press once or press and hold
Decrease value press once or press and hold
Switch from standby to heat pump mode (P6=0) and vice versa press for 5 s
Provides immediate access to the condenser and evaporator pressure and temperature probes and DTE, DTC1-2 press once
J + K Manual alarm reset press for 5 s
Immediately reset the hour counter (inside the programming area) press for 5 s
L + J Force manual defrost on both circuits press for 5 s
Table 1.b
1.2.4 Programming and saving the parameters
1. press “ “ and “ ” for 5 seconds;
2. the heating and cooling symbol and the fi gure “00” are displayed;
3. use
“ ” and “ ” to set the password (page 25) and confi rm by pressing “ ”;
4. use “ ” and “ ” to select the parameter menu (S-P) or levels (L-P) and then press “ ”;
5. use “ ” and “ ” to select the parameter group and then press “ ”;
6. use “ ” and “ “ to select the parameter and then press “ ”;
7. after making the changes to the parameter, press “ ” to confi rm or “ ” to cancel the changes;
8. press “ ” to return to the previous menu;
9. to save the modifi cations, press “ ” repeatedly until reaching the main menu.
Note:
a. the parameters that have been modifi ed without being confi rmed using the “ ” button return to
the previous value;
b. if no operations are performed on the keypad for 60 seconds, the controller exits the parameter
modifi cation menu by timeout and the changes are cancelled.
1.2.5. Keypad
The keypad is used to set the unit operating values (see Parameters/alarms - Keypad
combinations)