Unit installation

CDU Installation Guide Page 18
Cooling Distribution Unit
COMMISSIONING (continued)
Select ‘site setup’ and press . Use keys to set
the number of RDHx attached to the unit, then press .
Likewise, set the units to SI or imperial* as required & press
, followed by the Daylight Saving hours, Date Format
and Date & Time followed by on each occasion. Press
the key to return to welcome screen.
* Note: If ‘units’ are changed during CDU operation, any parameters that have been previously adjusted
will revert to default values.
5.4 Attaching to Mother Board (already carried out during factory test)
If, on power up, the display screen shows ‘Setup’ it means that the display communications with the
controller needs to be re-established. This will need to be done while the system is live. Switch off the
disconnect (isolator), open up the control panel and switch the disconnect (isolator) back on at the
base unit. Press OK, the display screen will show `attach to unit’. Press OK, the display screen will
show ‘Waiting for Service’ msg.
DANGER: This should only be carried out by a qualified electrician.
Next press the controller reset button found adjacent to connector CR4 on the controller mother board.
When the reset button is pressed, the screen will go direct to ‘Site Setup’ where the number of RDHx’s
operating units and the time & date can be set as described in Section 5.3. The screen will then return to
the normal welcome screen.
5.5 Display Contrast
If the display is faint or the text background too dark, the display
contrast should be adjusted. Switch off the disconnect (isolator), open
up the control panel and switch the disconnect (isolator) back on at
the base unit.
DANGER: This should only be carried out by a qualified
electrician.
Adjust the pot on the display PCB shown in the picture, until display
becomes clear.
OK
OK
OK
ESC
OK
attach to unit
site setup
factory defaults
Screen title
Selected screen
ref. number
setup 1-2
Reset button beside connector CR4