Table of Contents
Troubleshooting
Related Manuals for Daikin REYQ8T7Y1B
Summary of Contents for Daikin REYQ8T7Y1B
- Page 1 Installation and operation manual VRV IV system air conditioner REYQ8T7Y1B REYQ10T7Y1B REYQ12T7Y1B REYQ14T7Y1B REYQ16T7Y1B REYQ18T7Y1B REYQ20T7Y1B Installation and operation manual English VRV IV system air conditioner REMQ5T7Y1B...
- Page 2 2P329110-5H...
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Page 4: Table Of Contents
Table of contents 5.7.5 To finish the transmission wiring........22 Table of contents 5.7.6 To route and fix the power supply........ 22 5.7.7 To connect the power supply ........22 6 Configuration 1 About the documentation Making field settings..............23 About this document.............. -
Page 5: About The Documentation
▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). About the documentation ▪ The full set of latest technical data is available on the Daikin extranet (authentication required). About this document Target audience... -
Page 6: To Remove The Transportation Stay
3 About the units and options Accessory pipes (mm) Øa Øb Model Description Liquid pipe REMQ5 Heat recovery model for multi-use only ▪ Front connection Depending on the type of outdoor unit which is chosen, some ID Øb functionality will or will not exist. It will be indicated throughout this installation manual and brought to your attention. -
Page 7: Preparation
If the unit has to operate for 5 days in this area with Choose from the following table in accordance with the outdoor unit high humidity (>90%), Daikin recommends to install the total capacity type, connected downstream. optional heater tape kit (EKBPH012T or EKBPH020T) to... -
Page 8: To Select Refrigerant Branch Kits
4 Preparation Outdoor unit Piping outer diameter size (mm) Size up capacity type (HP) Liquid pipe Suction gas High HP class Liquid piping outer diameter size (mm) pipe pressure/low 9.5 → 12.7 pressure gas pipe 12+14 12.7 → 15.9 14~16 12.7 28.6 22.2... -
Page 9: Multiple Outdoor Units: Possible Layouts
4 Preparation Indoor unit capacity index 3 pipes 290≤x<640 KHRQ23M64H ≥640 KHRQ23M75H If the pipe size above the refnet header is Ø34.9 or more, KHRQ23M75H is required. To indoor unit Oil collects to the outmost outdoor unit when the system INFORMATION stops Maximum 8 branches can be connected to a header. -
Page 10: Installation
5 Installation 5~12 HP 14~20 HP Non-continuous heating Model Minimum Recommended circuit fuses ampacity REYQ12 24.0 A 32 A REYQ14 27.0 A 32 A REYQ16 31.0 A 40 A REYQ18 35.0 A 40 A REYQ20 39.0 A 50 A For all models: 14× 14× ▪ Phase and frequency: 3N~ 50 Hz ▪ Voltage: 380~415 V Once the front plates open, the electrical component box can be accessed. -
Page 11: Mounting The Outdoor Unit
5 Installation ▪ Fasten the unit in place using four foundation bolts M12. It is best NOTICE to screw in the foundation bolts until their length remains 20 mm When closing the electrical component box cover, make above the foundation surface. sure that the sealing material on the lower back side of the cover is NOT caught and bend towards the inside. -
Page 12: To Connect The Refrigerant Piping To The Outdoor Unit
5 Installation 5.3.2 To connect the refrigerant piping to the Connection Description outdoor unit Bottom connection Remove the knockout holes on the bottom frame and route the piping under the bottom. NOTICE ▪ Be sure to use the supplied accessory pipes when carrying out piping work in the field. -
Page 13: To Remove The Pinched Pipes
5 Installation p < p > R410A To handle the stop valve cover Pressure reducing valve ▪ The stop valve cover is sealed where indicated by the arrow. Do Nitrogen NOT damage it. Weighing scales Refrigerant R410A tank (siphon system) ▪... -
Page 14: Checking The Refrigerant Piping
5 Installation For more information on the state of the valves, refer to Checking the refrigerant piping "5.4.3 Checking refrigerant piping: Setup" on page 14. 5.4.1 About checking the refrigerant piping 5.4.2 Checking refrigerant piping: General guidelines Refrigerant piping works are Finish piping work. finished? Connect the vacuum pump through a manifold to the service port of all stop valves to increase efficiency (refer to... -
Page 15: To Perform Vacuum Drying
5 Installation ▪ If there is a possibility that condensation on the stop valve might To check for leaks: Vacuum leak test drip down into the indoor unit through gaps in the insulation and 1 Evacuate the system from the liquid and gas piping to piping because the outdoor unit is located higher than the indoor –... -
Page 16: About Charging Refrigerant
5 Installation Formula: NOTICE R=[(X ×Ø22.2)×0.37+(X ×Ø19.1)×0.26+(X ×Ø15.9)×0.18+ Close the front panel before any refrigerant charge ×Ø12.7)×0.12+(X ×Ø9.5)×0.059+(X ×Ø6.4)×0.022]×1.04+(A+B operation is executed. Without the front panel attached the unit cannot judge correctly whether it is operating properly or not. Additional refrigerant to be charged [in kg and rounded off to 1 decimal place] NOTICE Total length [m] of liquid piping size at Øa... - Page 17 5 Installation Pre-charging refrigerant Step 1 p < p > Calculate additional refrigerant charge amount: R (kg) Step 2+3 R410A • Close valves C, D and A • Open valve B to the liquid line • Execute pre-charging amount: Q (kg) •...
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Page 18: To Charge Refrigerant
5 Installation << Continuation of previous page Heating charging Cooling charging ("t22" startup control) ("t02" startup control) ("t23" waiting for stable heating) ("t03" waiting for stable cooling) "t23" is flashing "t03" is flashing • Push BS2 within 5 minutes • Push BS2 within 5 minutes •... -
Page 19: Step 6A: To Automatically Charge Refrigerant
5 Installation p < p > NOTICE ▪ The refrigerant charging port is connected to the piping inside the unit. The unit's internal piping is already factory charged with refrigerant, so be careful when connecting the charge hose. R410A ▪ After adding the refrigerant, do not forget to close the lid of the refrigerant charging port. -
Page 20: Step 6B: To Manually Charge Refrigerant
5 Installation INFORMATION Code Cause Solution Other — Close valve A ▪ When a malfunction is detected during the procedure malfunction immediately. Confirm the (e.g, in case of closed stop valve), a malfunction code code malfunction code and take will be displayed. In that case, refer to "8.1 ... -
Page 21: Guidelines When Knocking Out Knockout Holes
5 Installation 5~12 HP 14~20 HP Field power supply (with earth leakage protector) Main switch Earth connection Outdoor unit Indoor unit User interface BS unit Cool/heat selector Circuit breaker Fuse Power supply 3N~ 50 Hz Power supply 1~ 50 Hz Earth wiring 5.7.2 Guidelines when knocking out knockout holes ▪... -
Page 22: To Finish The Transmission Wiring
5 Installation 5~12 HP 14~20 HP Screw size Tightening torque (N•m) M3.5 (A1P) 0.8~0.96 TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT F2 Q1Q2 F1 F2 F1 F2 F1 F2 F1 F2 TO IN/D TO OUT/D TO IN/D TO OUT/D UNIT UNIT UNIT... -
Page 23: Configuration
6 Configuration Clamp (field supplied) Mode Description Cup washer Mode 2 Mode 2 is used to change the field settings of When connecting the earth wire, it is recommended to perform curling. the system. Consulting the current field setting (field settings) value and changing the current field setting Multiple outdoor units value is possible. -
Page 24: To Access Mode 1 Or 2
6 Configuration 6.1.5 To use mode 1 Mode 1 is used to set basic settings and to monitor the status of the unit. Make sure to re-attach the inspection cover into the electronic What component box cover and to close the front plate's inspection cover after the job is finished. -
Page 25: Mode 2: Field Settings
6 Configuration [1‑2] [2‑9] target (°C) Shows the status of power consumption limitation operation. 0 (default) Auto [1‑2] Description Unit is currently not operating under power consumption limitations. Unit is currently operating under power consumption limitation. [1‑5] [1‑6] Shows: [2‑14] ▪... -
Page 26: To Connect The Pc Configurator To The Outdoor Unit
7 Commissioning [2‑35] Description Using the leak detection function In case the outdoor unit is installed in the lowest position (indoor units are installed on a 6.2.1 About automatic leak detection higher position than outdoor units) and the height difference between the highest indoor The (automatic) leak detection function is not by default activated unit and the outdoor unit exceeds 40 m, the and can only start working when the additional refrigerant charge is... -
Page 27: About The Test Run
7 Commissioning Field wiring About the test run Be sure that the field wiring has been carried out The procedure below describes the test operation of the complete according to the instructions described in the chapter system. This operation checks and judges following items: "5.7 ... -
Page 28: Correcting After Abnormal Completion Of The Test Run
8 Troubleshooting Note: During the test operation, it is not possible to stop the unit Troubleshooting operation from a user interface. To abort the operation, press BS3. The unit will stop after ±30 seconds. Solving problems based on error 5 Check the test operation results on the outdoor unit 7‑segment display. - Page 29 8 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Electronic expansion valve malfunction Check connection on PCB or actuator. (upper heat exchanger) (Y1E) – main PCB (X21A) Electronic expansion valve malfunction Check connection on PCB or actuator. (lower heat exchanger) (Y3E) –...
- Page 30 8 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Liquid main - temperature sensor Check connection on PCB or actuator. (R3T) – main PCB (X30A) Subcool heat exchanger – liquid - Check connection on PCB or actuator. temperature sensor (R7T) - main PCB (X30A) Upper heat exchanger –...
- Page 31 8 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Malfunction code: system test run not Execute system test run. yet executed (system operation not possible) An error occurred during the test run Re-execute the test run. Test run aborted Re-execute the test run.
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Page 32: Technical Data
(e.g. Hydrobox, …) Technical data A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is available on the Daikin extranet (authentication required). Service space: Outdoor unit... -
Page 33: Piping Diagram: Outdoor Unit
9 Technical data INFORMATION INFORMATION The service space dimensions in above figure are based Further specifications can be found in the technical on cooling operation at 35°C ambient temperature engineering data. (standard conditions). Piping diagram: Outdoor unit Piping diagram: 5~12 HP Liquid Service port High pressure /... - Page 34 9 Technical data Piping diagram: 14~20 HP Liquid Service port High pressure / low pressure 3D088099 page 1 Installation and operation manual REYQ8~20+REMQ5T7Y1B VRV IV system air conditioner 4P353996-1E – 2018.04...
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Page 35: For The User
10 About the system Charge port / Service port Propeller fan Stop valve High pressure switch Filter Low pressure sensor Check valve High pressure sensor Pressure relief valve Oil separator Accumulator Thermistor Solenoid valve Heat exchanger Heat sink (PCB) Compressor Capillary tube Double tube heat exchanger Expansion valve... -
Page 36: Operating The System
12 Operation Special operation ranges are valid in case of using Hydrobox units or 12.2.4 To operate the system (WITHOUT cool/ AHU. They can be found in the installation/operation manual of the heat changeover remote control switch) dedicated unit. Latest information can be found in the technical engineering data. -
Page 37: Using The Dry Program
12 Operation 12.3 Using the dry program 12.4 Adjusting the air flow direction Refer to the operation manual of the user interface. 12.3.1 About the dry program 12.4.1 About the air flow flap ▪ The function of this program is to decrease the humidity in your room with minimal temperature decrease (minimal room cooling). -
Page 38: 13 Maintenance And Service
13 Maintenance and service User interface 13.2 After-sales service and warranty When the system is installed as shown in the figure above, it is necessary to – for each subsystem – designate one of the user 13.2.1 Warranty period interfaces as the master user interface. ▪... -
Page 39: Error Codes: Overview
14 Troubleshooting Malfunction Measure Main code Contents If the user interface display indicates the Notify your installer and EEPROM failure (indoor) unit number, the operation lamp flashes report the malfunction Drain system malfunction (indoor) and the malfunction code appears. code. Fan motor malfunction (indoor) If the system does NOT properly operate except for the above Swing flap motor malfunction (indoor) -
Page 40: Symptoms That Are Not System Malfunctions
14 Troubleshooting Main code Contents 14.2.4 Symptom: The fan speed does not correspond to the setting Autocharge operation related Autocharge operation related The fan speed does not change even if the fan speed adjustment Capacity setting malfunction (outdoor) button is pressed. During heating operation, when the room temperature reaches the set temperature, the outdoor unit goes off Abnormal low pressure drop, faulty expansion valve and the indoor unit changes to whisper fan speed. - Page 41 15 Relocation 14.2.10 Symptom: Noise of air conditioners NOTICE (Indoor unit, outdoor unit) Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other ▪ A continuous low hissing sound is heard when the system is in parts MUST comply with applicable legislation.
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