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RG66007169 - Rev 00
5 MICROPROCESSOR
CONTROL
5.2
USING THE CONTROL PANEL
5.2.2
INFORMATION ABOUT EQUIPMENT STATUS
Information regarding the status of the unit is provided by means of LEDs on the display.
Meaning of LEDs on the display:
5.3
SWITCHING ON AND OFF AND CHANGINGTHE OPERATING MODE
The unit may be switched on and off from the control panel installed on the unit itself.
To enable remote ON-OFF switching from the PCDS or via an external switch (not supplied) connected to terminals 18-30 (normally jumpered) it is necessary
to change parameter H7) from 00 to 01. (carry out the procedure of section 5.3.4, though having access from unit –H-).
Remote
ON/OFF
open: unit OFF (keyboard disabled)
Remote
ON/OFF
closed: unit ON (possibility to switch the unit ON and OFF from the keyboard)
Warning
Where remote ON-OFF switching is enabled (H7 = 01), after a power failure occurs and power is restored the unit will go into the mode
indicated by the remote input without considering any changes that have been made from the unit control panel
That is:
remote
ON/OFF
open: the unit remains Off
remote
ON/OFF
closed: the unit starts again
5.3.1
SWITCHING THE UNIT ON AND OFF IN THE COOLING MODE
Pressing for more than 5 seconds allows the unit to be switched on or off in the cooling mode.
It is not possible to change over directly from the cooling mode to the heating mode: to do so it is necessary to select the heating mode using the PCDS
remote control (accessory) or open terminal bridge 19-30 on the electric control board (see section 5.3.3).
5.3.2
SWITCHING THE UNIT ON AND OFF IN THE HEATING MODE (MPE H HEAT PUMP MODEL ONLY)
Pressing for more than 5 seconds allows the heating mode to be activated or deactivated.
It is not possible to change over directly from the heating mode to the cooling mode: to do so it is necessary to select the cooling mode using the PCDS
remote control (accessory) or close terminal bridge 19-30 on the electric control board (see section 5.3.3).
5.3.3
CHANGING THE OPERATING MODE
The unit leaving the factory has been configured for a fast, easy connection to the PCDS remote control (accessory), which enables the user to change the
operating mode and turn the unit on and off from a distance.
If the unit is not equipped with this accessory, to select the operating mode it is necessary to use terminals 19-30 on the electric control board as follows:
- terminals 19-30 closed for cooling
- terminals 19-30 open for heating
Warning
Only specialised personnel may access the electric control board. Therefore, to enable the user to switch the unit on and off and change
the operating mode safely and conveniently from a distance, it is recommended to install a PCDS remote control (or remote switches outside the unit).
SIMBOL
COLOR
MEANING
with LED ON
with LED OFF
1
Amber
Compressor 1 ON
Start up request
Amber
Compressor 1 ON
Amber
Pump ON
Start up request
Amber
Condenser fan ON
Amber Defrost
active
Defrost request
Amber heater
ON
Red Alarm
active
Amber
Chiller mode (P6=1)
Chiller mode request (P6=1)
Amber
Heat pump mode (P6=1)
Heat pump mode request (P6=1)
