About this document
Meaning of warnings and symbols
Indicates a situation that could lead to combustion/burning due to extremely high or low temperatures.
For the installer
- General
- Installation site
- Refrigerant — in case of R410A or R32
- Electrical
- Installation space requirements
NEVER pinch bundled cables and make sure they DO NOT come into contact with pipes and sharp edges. DO NOT connect wires of different gauge to the power terminal block (slack in the power wires may cause abnormal heat).
Instructions for safe operation
DO NOT place a flammable spray bottle near the air conditioner and DO NOT use spray near the unit. DO NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired.
Information requirements for fan coil units
For more information about the user interface, see the operating manual of the installed user interface. Before starting operation, contact your dealer for the operation corresponding to the type and brand of your system.
About operation modes
Basic operation modes
Special heating operation modes
Adjusting the airflow direction
When the room temperature is lower than the controller's set point for cooling operation (including auto operation). When the room temperature is higher than the controller's set point for heating operation (including auto operation). When the indoor units run continuously for a long time and the air flow direction is horizontal.
NEVER touch the air outlet or the horizontal blades while the swing valve is operating.
To operate the system
DO NOT place objects under the indoor and/or outdoor unit that may get wet. Otherwise, condensation may drip onto the unit or refrigerant pipes, air filter dirt or drain blockage, and objects under the unit may become dirty or damaged. If the doors and windows remain open, air will flow out of your room causing a decrease in the cooling or heating effect.
Please note that it may take some time for the room temperature to reach the set temperature. Adjust the direction of the airflow to prevent cool air from collecting on the floor or warm air against the ceiling. However, as an end user you can clean the air filter, the suction grille, the air outlet and the outer panels.
Cleaning the air filter, suction grille, air outlet and outside panels
To clean the air filter
Condensation can form if the humidity is above 80% or if the drain outlet is blocked. If it is very dirty, soak a cloth in neutral detergent diluted with water, wring it out well and wipe the panel. Measure the voltage at the main circuit capacitor terminals or electrical components before servicing.
Disconnect the power supply for more than 10 minutes and measure the voltage at the terminals of the main circuit capacitors or electrical components before servicing. For the location of the terminals, see the warning label for service and maintenance personnel.
To clean the suction grille
If the suction grill is very dirty, use a typical kitchen cleaner, leave it on for 10 min, then wash it with water.
To clean the air outlet and outside panels
Maintenance before a long stop period
Maintenance after a long stop period
About the refrigerant
About the refrigerant leakage sensor
Avoid using chemical substances (e.g. organic solvents, hairspray, paint) in high concentrations in the immediate vicinity of the indoor unit, as this may cause the R32 refrigerant leak sensor to misdetect. 6 months before sensor end of life and "CH-02" error after sensor end of life. For more information, see the user interface reference guide and contact your dealer.
See the user interface reference guide to stop the alarm from the user interface. If any of the following errors occur, take the measures shown below and contact your dealer. If, after checking all the above points, it is impossible to solve the problem yourself, contact your installer and state the symptoms, the full model name of the device (with manufacturing number if possible) and the date of installation (provided on the warranty card, if applicable) .
Symptom: The system does not operate
Check that the air inlet or outlet of the outdoor or indoor unit is not blocked by any obstacles.
Symptom: The fan speed does not correspond to the setting
Symptom: The fan direction does not correspond to the setting
Symptom: White mist comes out of a unit (Indoor unit)
Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)
Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes
Symptom: Noise of air conditioners (Indoor unit)
Symptom: Noise of air conditioners (Indoor unit, outdoor unit)
Symptom: Dust comes out of the unit
Symptom: The units can give off odours
DO NOT attempt to disassemble the system yourself: disassembly of the system, treatment of the coolant, oil and other parts MUST comply with current legislation. Bring the packaged unit as close as possible to its final installation position to prevent damage during transportation.
Indoor unit
To unpack and handle the unit
To remove the accessories from the indoor unit
Identification label: Indoor unit
About the indoor unit
System layout
Combining units and options
Possible options for the indoor unit
Optional output PCB (to provide output to external device): The PCB will trigger the external alarm in case of leak detection, sensor failure or when the sensor is disconnected. For more information on this option, refer to the installation instructions for the optional output print. An additional installation box is required for the optional output print. see the setting list for the indoor unit.
The wiring between the main PCB and the optional output PCB must be routed together with the transmission cable; never use the same route as for the power supply cable. For more information about an option, refer to the installation and operation manual of the option. Choose an installation location with enough space to transport the unit in and out of the premises.
Installation site requirements of the indoor unit
During construction work (e.g. grinding work) that produces a lot of dust, the unit MUST be covered. In places where mineral oil mist, spray or vapor may be present in the atmosphere. Make sure that in the event of a water leak, the water cannot cause damage to the installation space and the surrounding area.
Choose a place where the operating noise or the hot/cold air emitted from the unit will not disturb anyone and the location is chosen according to the applicable legislation. When the conditions in the attic exceed 30°C and a relative humidity of 80%, or when fresh air is sucked into the attic, additional insulation is needed (minimum 10 mm thickness, polyethylene foam). B Minimum and maximum distance to the floor (see below) C ≥295 mm: When mounting with BYFQ60B.
Mounting the indoor unit
- Guidelines when installing the indoor unit
- Guidelines when installing the drain piping
- Refrigerant piping requirements
- Refrigerant piping insulation
Fasten it securely using a nut and washer from the top and bottom of the hanging bracket. Be sure to use drain pipes and T-joints of the correct diameter for the operating capacity of the units. Incorrect connection of the drain hose can cause leaks and damage the installation space and surroundings.
While system installation is not complete, temporarily connect the user interface and power to the unit. 2 Gradually pour about 1 l of water through the water inlet and check for leaks (see "When the installation of the system is not yet finished. Outer diameter (Ø) Degree of strength Thickness (t)(a). a) Depending on the applicable legislation and the maximum working pressure unit (see "PS High" on the unit nameplate), a larger pipe thickness may be required.
Connecting the refrigerant piping
- About connecting the refrigerant piping
- Precautions when connecting the refrigerant piping
- Guidelines when connecting the refrigerant piping
- Pipe bending guidelines
- To flare the pipe end
- To connect the refrigerant piping to the indoor unit
- Precautions when connecting the electrical wiring
- Guidelines when connecting the electrical wiring
- Specifications of standard wiring components
If the temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the insulation material should be at least 20 mm to prevent condensation on the surface of the insulation. ALWAYS use a wrench and torque wrench together to tighten the flare nut when connecting pipes. 3 Remove the flare nut from the valve and place the flare nut on the pipe.
4 Wrap the sealing block from the base of the unit to the top of the flare nut. If stranded conductor wires are used, install a crimp-style round terminal on the end of the wire. Place the crimp-style round terminal on the wire up to the covered part and secure the terminal with the appropriate tool.
To connect the electrical wiring to the indoor unit
The user interface must be placed in the same room as the indoor unit. The test run is completed only if no malfunction code is displayed on the user interface or the 7-segment display of the outdoor unit. When using any other user interface, see the installation manual or service manual of the user interface.
It determines the interval at which the "Time to clean the filter" message is displayed on the user interface. Setting volume: The fan speed corresponds to the speed set by the user (low, medium, high) using the fan speed button on the user interface. Remote control is possible by sending the external input to terminals T1 and T2 on the user interface terminal block and transmission wiring.
This chapter gives you an overview of most possible error codes and their descriptions as they appear in the user interface. A subset of the latest technical data is available on Daikin's regional website (publicly accessible).
Precautions when commissioning
Checklist before commissioning
Check that the unit is properly installed to avoid abnormal noises and vibrations when turning on the unit. Make sure that the field wiring is carried out according to the instructions described in chapter "18 Electrical installation according to the wiring diagrams and according to the legislation in force. Make sure that the grounding wires are properly connected and that the grounding terminals are tightened.
Check that the fuses, circuit breakers or the locally installed protection devices are of the size and type specified in the chapter "18 Electrical installation. Visually check the electrical component box and the inside of the unit for loose connections or damaged electrical components. correct pipe sizes are installed and that the insulation work is carried out properly.
To perform a test run
Error codes: Overview
High pressure control in heating, freeze protection control in cooling Malfunction of fan motor. Failure of transmission (between indoor unit PCB and sub PCB) Malfunction of liquid pipe thermistor for heat exchanger Malfunction of gas pipe thermistor for heat exchanger Malfunction of gas pipe thermistor for heat exchanger Malfunction of suction air thermistor. The complete set of latest technical data is available on the Daikin Business Portal (authentication required).
Unified wiring diagram legend
All international, European, national and local guidelines, laws, regulations and/or codes that are relevant and applicable to a particular product or domain. Instruction manual specified for a particular product or application, explaining how to install, configure and maintain it. Labels, manuals, data sheets and equipment supplied with the product and which must be installed according to the instructions in the accompanying documentation.
Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.
Overview: Commissioning
