PANASONIC WH-UDZ03KE5 (01) PDF Document

You must adhere to the following WARNING safety precautions for the PANASONIC WH-UDZ03KE5 to prevent the possibility of death or serious injury:

1. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any unfit method or using incompatible material may cause product damage, burst and serious injury.

2. Do not install the outdoor unit near the handrail of a veranda. When installing the outdoor unit at the veranda of a high rise building, a child may climb up to the outdoor unit and cross over the handrail, causing an accident.

3. Do not use an unspecified cord, modified cord, joint cord or extension cord for the power supply cord. Do not share the single outlet with other electrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.

4. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on the power supply cord may happen.

5. Do not insert your fingers or other objects into the unit; a high-speed rotating fan may cause injury.

6. Do not sit or step on the unit; you may fall down accidentally.

7. Keep plastic bags (packaging material) away from small children; they may cling to the nose and mouth and prevent breathing.

8. When installing or relocating the outdoor unit, do not let any substance other than the specified refrigerant, e.g., air, mix into the refrigerant cycle (piping). Mixing of air etc. will cause abnormal high pressure in the refrigeration cycle and result in explosion, injury, etc.

9. Do not use a pipe wrench to install refrigerant piping. It might deform the piping and cause the unit to malfunction.

10. Do not purchase unauthorized electrical parts for installation, service, maintenance, etc. They might cause electrical shock or fire.

11. Do not modify the wiring of the outdoor unit for the installation of other components (i.e., heater, etc). Overloaded wiring or wire connection points may cause electrical shock or fire.

12. Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources of ignition. Else, it may explode and cause injury or death.

13. Do not add or replace refrigerant other than the specified type. It may cause product damage, burst and injury, etc.

14. Do not place containers with liquids on top of the Tank Unit. It may cause Tank Unit damage and/or fire could occur if they leak or spill onto the Tank Unit.

15. Do not use a joint cable for Tank Unit / Outdoor Unit connection cable. Use the specified Tank Unit / Outdoor Unit connection cable and connect it tightly. Clamp the cable so that no external force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection.

16. Do not use a joint cable for outdoor connection cable. Use the specified outdoor connection cable and connect it tightly. Clamp the cable so that no external force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection.

17. Wire routing must be properly arranged so that the control board cover is fixed properly. If the control board cover is not fixed perfectly, it will cause fire or electrical shock.

18. For electrical work, follow the national regulation, legislation and this installation instructions. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or a defect is found in the electrical work, it will cause electrical shock or fire.

19. For water circuit installation work, follow relevant European and national regulations (including EN61770) and local plumbing and building regulation codes.

20. Engage an authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical shock or fire.

21. This is an R32 model; use piping, flare nut and tools which are specified for R32 refrigerant. Using existing (R22) piping, flare nut and tools may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury. The thickness for copper pipes used with R32 must be more than 0.8 mm. Never use copper pipes thinner than 0.8 mm. It is desirable that the amount of residual oil is less than 40 mg/10 m.

22. For refrigeration system work, install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.

23. Install at a strong and firm location which is able to withstand the weight of the set. If the strength is not enough or installation is not properly done, the set will drop and cause injury.

24. This equipment is strongly recommended to be installed with a Residual Current Device (RCD) on-site according to the respective national wiring rules or country-specific safety measures in terms of residual current.

25. During installation, install the refrigerant piping properly before running the compressor. Operation of the compressor without fixing refrigeration piping and valves at the opened position will cause a suck-in of air, abnormal high pressure in the refrigeration cycle and result in explosion, injury, etc.

26. During pump down operation, stop the compressor before removing the refrigeration piping. Removal of refrigeration piping while the compressor is operating and valves are opened will cause a suck-in of air, abnormal high pressure in the refrigeration cycle and result in explosion, injury, etc.

27. Tighten the flare nut with a torque wrench according to the specified method. If the flare nut is over-tightened, after a long period, the flare may break and cause refrigerant gas leakage.

28. After completion of installation, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant contacts fire.

29. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts fire.

30. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock.

31. Any work carried out on the Tank Unit after removing any panels which are secured by screws, must be carried out under the supervision of an authorized dealer and licensed installation contractor.

32. Be aware that refrigerants may not contain an odour.

33. This equipment must be properly earthed. The earth line must not be connected to a gas pipe, water pipe, earth of a lightning rod and telephone. Otherwise, it may cause electrical shock in case of equipment breakdown or insulation breakdown.

You should follow these CAUTION safety precautions for the PANASONIC WH-UDZ03KE5 to prevent injury or damage to properties:

1. Do not install the Tank Unit at a place where leakage of flammable gas may occur. In case gas leaks and accumulates at the surrounding of the unit, it may cause a fire.

2. Prevent liquid or vapor from entering sumps or sewers since vapor is heavier than air and may form suffocating atmospheres.

3. Do not release refrigerant during piping work for installation, re-installation, and during repairing refrigeration parts. Take care of the liquid refrigerant; it may cause frostbite.

4. Do not install this appliance in a laundry room or other high humidity location. This condition will cause rust and damage to the unit.

5. Make sure the insulation of the power supply cord does not contact a hot part (i.e., refrigerant piping, water piping) to prevent insulation failure (melt).

6. Do not touch the sharp aluminium fin; sharp parts may cause injury.

7. Do not apply excessive force to water pipes that may damage the pipes. If water leakage occurs, it will cause flooding and damage to other properties.

8. Do not transport the Tank Unit with water inside the unit. It may cause damage to the unit.

9. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.

10. Select an installation location which is easy for maintenance. Incorrect installation, service or repair of this Tank Unit may increase the risk of rupture and this may result in loss, damage, or injury and/or property.

11. Power supply connection to Tank Unit:

• Power supply point should be in an easily accessible place for power disconnection in case of emergency.

• Must follow local national wiring standard, regulation and this installation instruction.

• Strongly recommended to make permanent connection to a circuit breaker.

• For Tank Unit WH-ADC0309K3E5 and WH-ADC0309K3E5AN:

– Power Supply 1: For WH-UDZ03KE5* and WH-UDZ05KE5*, use an approved 15/16A 2-poles circuit breaker with a minimum contact gap of 3.0mm. For WH-UDZ07KE5* and WH-UDZ09KE5*, use an approved 25A 2-poles circuit breaker with a minimum contact gap of 3.0mm.

– Power Supply 2: Use an approved 16A 2-poles circuit breaker with a minimum contact gap of 3.0mm.

• For Tank Unit WH-ADC0309K6E5 and WH-ADC0309K6E5AN:

– Power Supply 1: For WH-UDZ03KE5* and WH-UDZ05KE5*, use an approved 15/16A 2-poles circuit breaker with a minimum contact gap of 3.0mm. For WH-UDZ07KE5* and WH-UDZ09KE5*, use an approved 25A 2-poles circuit breaker with a minimum contact gap of 3.0mm.

– Power Supply 2: Use an approved 30A 2-poles circuit breaker with a minimum contact gap of 3.0mm.

12. Ensure the correct polarity is maintained throughout all wiring. Otherwise, it will cause electrical shock or fire.

13. After installation, check the water leakage condition in the connection area during the test run. If leakage occurs, it will cause damage to other properties.

14. If the Tank Unit does not operate for a long time, the water inside the Tank Unit should be drained.

15. Installation work may need three or more people to carry out. The weight of the Tank Unit might cause injury if carried by one person.

16. Keep any required ventilation openings clear of obstruction.

The key features of the PANASONIC WH-UDZ03KE5 are:

• Inverter Technology: Energy saving.

• High Efficiency

• Environment Protection: Uses non-ozone depletion substances refrigerant (R32).

• Long Installation Piping: Long piping up to 25 meters (UDZ03KE5) with a height difference of 20 meters (UDZ03KE5).

• Easy to use control panel:

◦ Auto mode

◦ Holiday mode

◦ Dry concrete function

◦ Weekly timer setting

• A-class energy efficiency pump: Water pump speed can be set by selection at the control panel.

• Improved deice cycle

• Protection Feature:

◦ Random auto restart after power failure for safety restart operation

◦ Gas leakage protection

◦ Prevent compressor reverse cycle

◦ Inner protector to protect the compressor

• Serviceability Feature:

◦ Breakdown Self Diagnosis function

◦ System Status Check Buttons for servicing purposes

◦ System Pumpdown Button for servicing purposes

WARNING: Strictly follow the steps below for a proper pump down procedure. An explosion may occur if the steps are not followed as per sequence.

1. When the Tank Unit is not in operation (standby), enter the Service setup menu in the Remote Controller and select Pump down operation to turn it ON.

2. After 10-15 minutes (or 1-2 minutes in very low ambient temperatures < 10°C), fully close the 2-way valve on the Outdoor Unit.

3. After 3 minutes, fully close the 3-way valve on the Outdoor Unit.

4. Press the “OFF/ON” switch on the Remote Controller to stop the pump down operation.

5. Remove the refrigerant piping.

To check the water pressure from the remote controller, follow these steps:

1. Press the SW button and scroll to “System check”.

2. Press the Enter button and scroll to “System information”.

3. Press the Enter button and search for “Water pressure”.

IMPORTANT: Do not purge the air with refrigerants; use a vacuum pump to vacuum the installation. There is no extra refrigerant in the outdoor unit for air purging. Before the system is charged with refrigerant, this test must be verified by certified technicians.

Preparation (Steps 1-2)

1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve.

2. Attach the gauge manifold set correctly and tightly. Make sure that both valves of the manifold gauge (low and high pressure) are in the close position.

Evacuation (Steps 3-4)

3. Connect the center hose of the manifold gauge to a vacuum pump.

4. Turn on the vacuum pump, then open the low side manifold gauge valve and ensure the needle in the gauge moves from 0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa) or vacuum until 500 microns is achieved. This process continues for approximately ten minutes. Then close the low side manifold gauge valve.

Tightness Test with Inert Gas (Steps 5-8)

5. Remove the vacuum pump from the center hose and connect it to a cylinder of any applicable inert gas as test gas.

6. Charge test gas into the system and wait until the pressure within the system reaches a minimum of 1.04MPa (10.4barg).

7. Wait and monitor the pressure reading on the gauges. Check if there is any pressure drop. The waiting time depends on the size of the system.

8. If there is a pressure drop, proceed to “Leak Detection and Repair”. If there is no pressure drop, proceed to “Recovery of Test Gas”.

Leak Detection and Repair (Steps 9-12)

9. Use a Gas Leak Detector with a sensitivity of 5 grams per year of test gas or better to check for leaks.

10. Move the probe along the Air-to-Water Heatpump system to check for leaks and mark for repair.

11. Any detected and marked leak shall be repaired.

12. After repair, repeat the evacuation (steps 3-4) and tightness test (steps 5-7). Check the pressure drop as in step 8.

Recovery of Test Gas and Final Steps (Steps 13-18)

13. If no leak is found, recover the test gas. Perform evacuation of steps 3-4. Then proceed to step 14.

14. Disconnect the charging hose from the service port of the 3-way valve.

15. Tighten the service port caps of the 3-way valve at a torque of 18 N·m with a torque wrench.

16. Remove the valve caps of both the 2-way and 3-way valves.

17. Open both valves using a hexagonal wrench (4mm). It is recommended to allow refrigerant to flow slowly into the system to prevent freezing. Slightly open the 2-way valve for 5 seconds, then close the valve. Repeat this action for 3 cycles, then fully open the valve.

18. Mount back the valve caps onto the 2-way and 3-way valves to complete the process.

Notes: Recommended use of any of the following leak detectors:

I) Universal Sniffer leak detector

II) Electronic halogen leak detector

III) Ultrasonic Leak Detector

Error H12 indicates an issue with the connection capability rank, meaning there’s a mismatch between the indoor and outdoor units. This can be caused by a wrong model being interconnected, or a faulty or incorrect PCB in either the indoor or outdoor unit.

Follow these troubleshooting steps:

1. Initial Check:

• Does the H12 error occur immediately after installation? If yes, proceed.

• If the error occurs after a certain period of usage, has any indoor or outdoor PCB been replaced or serviced? If yes, check the spare part number against the parts list. If the part number is incorrect, change the PCB for the specified model.

2. Model and Capacity Check:

• Is the outdoor unit model and capacity within the rank of allowable indoor unit capacity? Refer to the table below.

• If the models do not match, rectify the model selection.

3. Capacity Rank Setting:

• If the models match, has the capacity rank been set at the control panel? If not, set the capacity rank.

4. Final Step:

• After the capacity is set, turn off the breaker, and then turn on the power again to operate the unit.

If these steps do not resolve the issue, contact a qualified service technician.

Error H15 indicates an abnormality with the compressor tank temperature sensor. This could be due to a faulty connector, a faulty sensor, or a faulty outdoor unit PCB.

Follow these steps to troubleshoot:

1. Check Connector Connection: Turn OFF the power and check the CN-TANK connector connection on the outdoor unit PCB. If it’s not normal (e.g., loose or disconnected), correct the connection. If the connection is normal, proceed to the next step.

2. Check Sensor Resistance:

• With the power still off, unplug the sensor connector from the outdoor unit PCB (main).

• Measure the resistance of the compressor tank temperature sensor.

• Compare the measured resistance to the value specified in its characteristic chart. If the value does not match, there is a defect in the sensor. Replace the compressor tank temperature sensor.

• If the resistance value matches the chart, the outdoor unit PCB (main) is likely defective. Replace the outdoor unit PCB (main).

Error H20 indicates a Water Pump Abnormality. This means the rotation speed detected by the water pump motor is either too high (> 6,000rpm) or too low (< 1,000rpm). This can be caused by a motor winding issue, broken wires, an IPM malfunction, or a faulty indoor unit PCB.

Troubleshooting Steps:

For safety, always switch off the power before removing or connecting any component.

1. Initial Check: Turn ON the power and operate the water pump. Does it operate? If yes, stop the pump and proceed to check the feedback signal. If no, continue to the next step.

2. Check Pump Connection: Turn OFF the power. Check if the water pump connector is properly connected. If there is poor contact, correct the connection. If the connection is normal, proceed.

3. Check Input Voltage: Disconnect the water pump connector CN-PUMP1. Turn ON the power and check the input voltage from the indoor unit PCB.

• Is the drive power supply voltage between 280-373Vdc (pin 1 & 4) generated? If no, replace the indoor unit PCB.

• If yes, is the control power supply 15Vdc (pin 5 & 4) generated? If no, replace the indoor unit PCB.

• If yes, operate the water pump. Is the duty command range between 0-6Vdc (pin 6 & 4) generated? If yes, replace the water pump. If no, replace the indoor unit PCB.

4. Check Feedback Signal (If pump operated initially): Operate the water pump. Is a feedback signal (pulse) generated between pin 7 & 4 of CN-PUMP1? If yes, replace the indoor unit PCB. If no, replace the water pump.

Error H99 indicates that the indoor refrigerant liquid temperature is below 0°C during anti-freezing control in cooling operation. This can be caused by a faulty water pump, insufficient water flow, water leaks, a partially closed valve, a clogged expansion valve, refrigerant shortage, a faulty sensor, or a faulty indoor unit PCB.

Troubleshooting Steps:

1. Check System Water Pump:

• Is the water pump working? If no, replace the faulty water pump.

• If yes, check the system water flow rate. Is the water pump speed adjusted correctly according to the system’s hydraulic external static pressure? If no, readjust the water pump speed. If yes, proceed.

2. Check for Leaks and Blockages:

• Check the system water passage. Is there any water leakage? If yes, fix the system water leakage.

• Check the 2-way valve. Is it partially closed? If yes, open the 2-way valve.

3. Check Refrigeration Components:

• Check for a clogged expansion valve or strainer. Is it clogged (ice formed)? If yes, replace the expansion valve/strainer and then reclaim and recharge the refrigerant.

• If not clogged, check the refrigerant amount. Is the additional refrigerant amount filled correctly? If no, reclaim and recharge with the correct amount of refrigerant.

4. Check Sensors and PCB:

• Check the indoor refrigerant liquid temperature sensor. Does it conform to the sensor characteristic chart? If yes, the indoor unit PCB is likely faulty; replace it. If no, replace the indoor refrigerant liquid temperature sensor.