Daikin VRV IV Series Installation Manual

Contents

Daikin VRV IV Series Installation Manual Manual pdf 17 page image

3P405106-10 English 142. Setting when changing the “Automatic mode differential” in the Cooling/Heating AutomaticOper ation Mode.〈Setting description〉• The “Automatic mode differential” can be changed within the range of 0°F (0°C) to 12.6°F (7°C) (0°F(0°C) at factory shipment).• For details regarding the “Automatic mode differential” and indoor unit operation, refer to the EngineeringData Book.〈Setting method〉The setting is made using the “Local setting mode” by the remote controller of indoor unit connected to theBranch Selector unit.For information regarding the setting method, refer to the Engineering Data Book.The following table gives a list of the “MODE NO.,” “FIRST CODE NO.,” and “SECOND CODE NO.”NOTEThis setting is operated by the operation remote controller while the indoor unit power is turned on.• When the indoor unit, outdoor unit, and Branch Selector unit installation work is completed, confirm thatit is safe even with the power turned on before proceeding with the work.MODE NO. FIRST CODE NO. SECOND CODE NO. Automatic mode differential °F (°C)12 (22) 41 0 (0) ← At factory shipment.2 1.8 (1)3 3.6 (2)4 5.4 (3)5 7.2 (4)6 9.0 (5)7 10.8 (6)8 12.6 (7)8. ADDING AN ADDITIONAL CHARGE OF REFRIGERANTFollow the instructions in the installation manual that came with the outdoor unit to add an additional chargeof refrigerant.9. CHECK OPERATION AND TEST OPERATION(1) Verify that the control box cover is closed.(2) Refer to the installation manual included with the outdoor unit and conduct a check and a test run afterall the work on the Branch Selector unit and outdoor and indoor units is completed and the operationalsafety of the units is confirmed.• You will hear the motor operated valve operating sound for about 90 seconds as it is automaticallyinitialized (closed) after power is turned on, but this is not a problem.• System malfunctions can be verified by means of the following method:Indication on the indoor operation remote controllerOverall system malfunctions, including of the Branch Selector unit, can be identified using the LCDmalfunction display on the operation remote controller. For more information about the malfunctiondisplay and its significance, refer to the service precaution name plate affixed to the indoor unit andthe user manual included with the outdoor unit.

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