EWWQ090G ÷ EWWQ720L - R410A - Water-cooled scroll chillers
EWLQ090G ÷ EWLQ720L - R410A - Condenser less
EWHQ100G ÷ EWHQ400G - R410A - Heat pump scroll chillers
EWAQ-
- R410A - Air-cooled scroll chillers
EWAQ-
- R410A - Air-cooled scroll chillers
EWYQ-
- R410A - Air-cooled scroll heat pumps
Air and Water cooled scroll chillers & heat pump
Operation
Manual
EWWQ - EWLQ - EWHQ
EWAQ - EWYQ
Air or Water cooled scroll chiller &
heat pump
D-EOMHW00107-15EN
Operation Manual
21
Bacnet IP BUS LED
BUS LED
Mode
Solid Green
Ready for Communication. The BACnet Server is started. It doesn't indicate a active communication
Solid Yellow
Startup. The LED stays yellow until the module receives a IP Address, therefore a link must be established.
Solid Red
BACnet Server down. Automatic restart after 3 seconds is initiated.
Modbus BUS LED
BUS LED
Mode
Solid
Green
All Communication running
Solid
Yellow
Startup, or one configured channel not communicating to the Master
Solid Red
All configured Communications down. Means no communication to the Master. The timeout can be configured.
In case that the timeout is zero the timeout is disabled.
3.6 Controller maintenance
The UC requires to maintain the installed battery. Battery model is: BR2032 and it is produced
by many different vendors.
On board real time clock settings are maintained thanks to a battery mounted on the controller.
Make sure that the battery is replaced regularly each 2 years.
Battery is only used to supply the onboard real time clock. All the other settings are retained in a
non volatile memory.
To replace the battery gently remove the plastic cover of the controller display using a screw
driver as shown in the following pictures:
Be careful to avoid damages to the plastic cover. The new battery shall be placed in the proper
battery holder which is highlighted in the following picture, respecting the polarities indicated
into the holder itself.
