Operation manual VRV IV system indoor unit HXHD125A8V1B ONTENTS Page CAUTION 1. Definitions.................. 1 This unit contains electrical and hot parts. 1.1. Meaning of warnings and symbols..........1 Before operating the unit, be sure the installation has 1.2. Meaning of used terms ..............1 been carried out correctly by an installer.
3.2. Scope of this manual Equipment which needs to be installed according to instructions in this manual, but which are not supplied by Daikin. This manual describes how to start up and switch off the unit, set parameters and configure the schedule timer by means of the controller, maintain the unit and solve operational problems.
UICK START UP OF THE UNIT Domestic water heating operation In this chapter the step-by-step procedure is explained for starting up Domestic water heating (only if domestic hot water tank option is installed) space heating and domestic water heating. Automatic storage (daily water heat-up, once during night and/or once during day) The more detailed information of how the unit must be operated is explained in the chapter...
OPERATION MODE ICONS PERATION OF THE UNIT These icons indicate the current operation mode(s): space heating ( ), domestic water heating ( ) or quiet mode ( The remote controller offers full control over your installation. It can Within limits, different modes can be combined, e.g. space control all heating applications which vary in capacity, electrical heating and domestic water heating.
14. DEFROST/START UP MODE ICON 29. LEAVING WATER TEMPERATURE ADJUST BUTTONS This icon indicates that the defrost/start up mode is active. These buttons are used to adjust the leaving water temperature 15. COMPRESSOR ICON set point in normal operation mode or in schedule timer This icon indicates that the compressor in the indoor unit of the programming mode.
5.3. Space heating operation ( ) Automatic setback function Setback function provides the possibility to lower the room Space heating operation can be controlled in two different ways: temperature. The setback function can for instance be activated based on room temperature, during the night because the temperature demands during night and based on leaving water temperature.
Field settings define the parameters for the weather dependent Leaving water temperature control operation of the unit. Refer to "5.12. Field settings" on page 18 for a detailed description how to set one or more field settings. In this mode, heating will be activated as required by the water temperature set point.
5.4. Domestic water heating operation ( Automatic setback function Setback function provides the possibility to lower the room temperature. The setback function can for instance be activated INFORMATION during the night because the temperature demands during night and Any domestic water heating operation is impossible when day are not the same.
The storage temperature set point and the timing are field settings. Manual storage Refer to "5.12. Field settings" on page 18 for a detailed description how to set one or more field settings. This mode is to be selected manually and will make the indoor unit [1-00] Status: defines whether the domestic water heating immediately deliver hot water to the domestic hot water tank.
5.5. Other operation modes Reheat Start up operation ( This mode will prevent the domestic hot water from cooling down lower than a certain temperature. When enabled the indoor unit will During start up, the icon displays, indicating that the heat deliver hot water to the domestic hot water tank when the reheat pump is starting up and is not working in a steady state condition.
5.6. Simultaneous demand of space heating and 5.8. Schedule timer operation domestic water heating In schedule timer operation, the installation is controlled by the schedule timer. The actions programmed in the schedule timer will be The unit can not perform domestic water heating and space heating executed automatically.
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Operation example: Schedule timer based on temperature set Operation example: Schedule timer based on ON/OFF instruction points When setback function is enabled, the setback operation will have priority over the scheduled action in the schedule timer if ON INFORMATION instruction is active. If OFF instruction is active this will have priority When setback function is enabled, the setback operation over the setback function.
5.9. Programming and consulting the schedule timer Domestic water heating Programming the schedule timer is flexible (you can add, remove or Refer to "Programming domestic water heating" on page alter programmed actions whenever required) and straightforward (programming steps are limited to a minimum). However, before Domestic water heating can be done through several standard programming the schedule timer, remind: operation modes:...
Programming space heating is carried out as follows: Programming space heating INFORMATION Returning to previous steps in the programming procedure without saving modified settings is done by pressing the button. Press the button to enter the programming/consulting mode. Select the operation mode you would like to program by means of the buttons.
Programming domestic water heating is carried out as follows: Programming domestic water heating INFORMATION Returning to previous steps in the programming procedure without saving modified settings is done by pressing the button. Press the button to enter the programming/consulting mode. Select the operation mode you would like to program by means of the buttons.
Programming quiet mode is carried out as follows: Programming quiet mode INFORMATION Returning to previous steps in the programming procedure without saving modified settings is done by pressing the button. Press the button to enter the programming/consulting mode. Select the operation mode you would like to program by means of the buttons.
Deleting one or more programmed actions Consulting programmed actions Deleting one or more programmed actions is done at the same time Consulting space heating, domestic water heating or quiet mode is as storing the programmed actions. carried out as follows: When all actions for one day have been programmed, make sure that the display shows the highest action number you would like to save.
5.12. Field settings INFORMATION The configuration of the Daikin system is done through field settings. Before shipping, the set values have been set as shown under "5.13. Field settings table" on page In this operation manual all field settings related to the operation of the unit and user demand are explained.
5.13. Field settings table Installer setting at variance with default value First Second Default code code Setting name Date Value Date Value value Range Step Unit Remote control setup Installation related setting — Installation related setting –5~5 °C Not applicable. Do not change the default value. —...
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Installer setting at variance with default value First Second Default code code Setting name Date Value Date Value value Range Step Unit Automatic temperature compensation Installation related setting –2~2 °C Installation related setting –5~5 °C Installation related setting –5~5 °C Not applicable.
AINTENANCE ROUBLESHOOTING This section provides useful information for diagnosing and 6.1. Maintenance activities correcting certain problems which may occur with the unit. In order to ensure optimal operation of the unit, a number of checks OSSIBLE CAUSES ORRECTIVE ACTIONS and inspections should be carried out on the unit at regular intervals, No readings on the remote controller •...