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pre-selected code, which can be changed with the and
keys. Pressing the PRG key memorizes the new values and
exits the procedure. If for over 10 seconds no modification is
made, the display begins to flash. If no other key is pressed
in 60 seconds, the unit will go back to normal status without
changing any parameter.
Access to “FACTORY” parameters
The FACTORY parameters are factory-set. These are pro-
tected by a password to avoid access to unauthorized per-
sonnel. Pressing the PRG and SEL keys simultaneously for
over 5 seconds displays 00 flashing. Enter the password (au-
thorized personnel) and press SEL. The first FACTORY pa-
rameter is displayed. Pressing the and keys moves you
through all FACTORY parameters available. Pressing SEL
once again displays the parameter value of the pre-selected
code, which can be changed with the and keys. Press-
ing the PRG key memorizes the new values and exits the
procedure. If for over 10 seconds no modification is made,
the display begins to flash. If no other key is pressed in 60
seconds, the unit will go back to normal status without chang-
ing any parameter.
Deactivation of the buzzer
To deactivate the alarm buzzer, press the MUTE key. (The
buzzer will become operative only is programmed previously.)
Alarm reset
Pressing the and keys for over 5 seconds (if using a
remote terminal, press the CLEAR key for over 5 seconds)
will cancel present in the memory. The alarm message will
also disappear from the display and the alarm relay will be
deactivated.
Forces defrost (YLCC-H)
Pressing the SEL and keys simultaneously for over 5 sec-
onds activates the forced defrost cycle of both coils, as long
as the temperature of said coils is below the value set for
finalizing defrost.
Clearing hour counters
When displaying compressor or heat pump operating hours
(parameters c9, cA and cC), the counter can be cleared by
pressing the and keys simultaneously (if a remote termi-
nal is being used, press the CLEAR key).
Installation of default parameters
With the unit turned off, press the PRG key. Holding this key
down turns the system on. Once this process is over, the
letters dF appear on the display. The default parameters are
those included by the controller manufacturer and affect the
DIRECT and USER parameters based on the FACTORY val-
ues.
Adjusting display contrast
On remote terminals only. Press the key located between
MUTE and PRG to access the three contrast levels avail-
able.
Summery of keyboard functions
Key
Unit status Action
Normal operation. Entering water temp. is
displayed (probe B1)
List of parameters
Display of values
Normal operation
List of parameters
Display of values
Buzzer active
Normal operation
List of parameters
Display of values
Normal operation
List of parameters
Display of values
Normal operation
Normal operation
Normal operation
Display of hours
In start-up
In start-up
DIRECT parameters appear after 5 seconds
Display of values
Display list of parameters
USER parameters appear after 5 seconds
Memorizes EEPROM values and then displays probe B1
temperature.
Memorizes EEPROM values and then displays probe B1
temperature.
Copies key on controller EEPROM
Installs default parameters and values
Clears counter
Resets alarms after 5 seconds
Starts forced defrost after 5 seconds, if allowed by temperature
conditions
FACTORY parameters appear after 5 seconds (password)
Decreases value
Display of parameters
Activates or deactivates HEAT mode after 5 seconds
Increases value
Display of parameters
Activates or deactivates COOL mode after 5 seconds
Buzzer goes off
SEL
PRG
UP / HEAT
DOWN / HEAT
PRG + SEL
SEL + UP
UP + DOWN
PRG
PRG + UP
In start-up Copies EEPROM on the keyPRG + DOWN