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30AW

Control management

When power supply is reset

Fail Mode

Anti Freeze Protection in O Mode

When a unit is powered up, depending on its Auto Start conguration, it will start up with its last operating parameters, or

OFF Mode.

The EEPROM is available for saving the operating environment of the control in the event of a power-reset condition. If not

congured for auto start, at the power up the system will remain in OFF Mode.

All the NUI codes will be restored on a power up condition.

When the unit has a diagnostic failure, fail mode is executed.

*GUIF0QFSBUJOH.PEFJT'"*-UIFOUIFPOCPBSE-&%XJMMCMJOLUIFGBVMUDPEFTFOEUIF'PSDFE0òNFTTBHFUPUIF6OJUJO

case of not recoverable error and Water pump remains energized. In addition and if connected, the same message code

will be sent to NUI and, as an alternative, the alarm relay output should be activated as dened.

5IJTBMHPSJUINQSPUFDUTUIFSPPNGSPNGSFF[JOHXIFOJO0ò.PEFBOEJGTFMFDUFECZUIF6TFS)0.&"/5*'3&&;&FOBCMFE

that can also select the Antifreeze Temperature. An hysteresis of - 0°C /+2°C should be applied.

AF: Anti-

Freeze

NUI Code 2

HOME

ANTIFREEZE

STATUS

CHILLER

UNIT: OFF

WP: OFF after

35 sec. if

was ON

NUI: OFF

Mode: ON Heat

WSP: 35°C

WP: ON

NUI: Display Antifreeze

CHILLER UNIT: OFF

WP: OFF after 30 sec. if

was ON

NUI: OFF + Antifreeze

START

Disable

enable

T< AF ValueT AF Value

SM_30AW.indd 57 14-03-2011 14:45:05

Carrier 30AWH015HB User Manual

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