Daikin EWAP400MBYN [210/452] On off management

Functional Control for a Standalone Unit ESIE05-07

2–14 Part 2 – Functional Description

2.3 On/Off Management

Introduction There are four ways of switching the unit on and off:

P Through the local key of the controller.

P Through the schedule timer.

P Through the BMS.

The last command, of these three, determines the status of the local key.

P Through a remote switch. The remote switch gives an on/off signal to one of the changeable digital

inputs of the controller.

If the remote switch function is used, then an AND function with the first three commands

determines the on/off status of the unit.

Power on

P The initialization takes 10 seconds.

P The controller automatically goes to the menu overview.

Remark:

An auto restart function is integrated. This means that the on/off status is remembered after a power

failure of the unit

Remote on/off The procedure to switch the unit on/off depends on the settings of the changeable inputs/outputs.

These settings can be made in the service menu.

Remark:

The remote on/off switch is field supply.

On/off status This table gives an overview of the status of the unit and LEDs in applications with a remote switch. In

case there's no remote switch the status of the unit only depends on the status of the local key.

Emergency stop In the event of an emergency, switch of the unit by pushing the emergency button.

When the problem is solved, do not forget to reset the emergency button.

Remarks 1 To prevent the unit from stopping at 100%, the unit will always loaddown to 12% and operate at

this capacity for 4 seconds before shutting down. During 8 seconds (default C12% stop time) the

12% coil will be energized, after time/2 the compressor will stop.

This way the difference between high and low pressure side is smaller, which means the backspin

will be less and the wear of the compressor will also be reduced.

2 When the remote switch is "OFF" it isn't possible to switch the unit on with the controller.

Local key Remote Switch Unit

o LED

ON ON ON ON

ON OFF OFF Flashing

OFF ON OFF OFF

OFF OFF OFF OFF

ESIE05-07.book Page 14 Wednesday, October 11, 2006 10:42 AM