York 152, YLCC-h, 122 manual Access to “FACTORY” parameters, Deactivation of the buzzer, Alarm reset

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	DIRECT parameters appear after 5 seconds
	displayed (probe B1)
SEL
	List of parameters	Display of values
	Display of values	Display list of parameters
	Normal operation	USER parameters appear after 5 seconds
	List of parameters	Memorizes EEPROM values and then displays probe B1
		temperature.
PRG
	Display of values	Memorizes EEPROM values and then displays probe B1
		temperature.
	Buzzer active	Buzzer goes off
	Normal operation	Activates or deactivates COOL mode after 5 seconds
UP / HEAT
	List of parameters	Display of parameters
	Display of values	Increases value
	Normal operation	Activates or deactivates HEAT mode after 5 seconds
DOWN / HEAT
	List of parameters	Display of parameters
	Display of values	Decreases value
PRG + SEL	Normal operation	FACTORY parameters appear after 5 seconds (password)
SEL + UP	Normal operation	Starts forced defrost after 5 seconds, if allowed by temperature
		conditions
UP + DOWN	Normal operation	Resets alarms after 5 seconds
	Display of hours	Clears counter
PRG	In start-up	Installs default parameters and values
PRG + UP	In start-up	Copies key on controller EEPROM
PRG + DOWN	In start-up	Copies EEPROM on the key

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