PANASONIC CU-E15HBEA (01) PDF Document

Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed.

Do not modify the machine, part, material during repairing service.

If a wiring unit is supplied as a repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit.

Do not wrench the fasten terminal. Pull it out or insert it straightly.

Engage a dealer or specialist for installation and servicing. If installation of servicing done by the user is defective, it will cause water leakage, electrical shock or fire.

Install according to installation instructions strictly. If installation is defective, it will cause water leakage, electric shock or fire.

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

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

For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.

This equipment is strongly recommended to install with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD). Otherwise, it may cause electrical shock and fire in case equipment breakdown or insulation breakdown.

Do not use joint cable for indoor / outdoor connection cable. Use the specified indoor / outdoor connection cable, refer to installation instruction CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor / outdoor connection. Clamp the cable so that no external force will be acted on the terminal. If connecting or fixing is not perfect, it will cause heat up or fire at the connection.

Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause heat-up or fire at the connection point of terminal, fire or electrical shock.

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

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

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

Keep away from small children, the thin film may cling to nose and mouth and prevent breathing.

Do not use unspecified cord, modified cord, joint cord or extension cord for 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.

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

In case of using existing (R22) pipes during installation of R410 models, must carry out pump down properly to collect back the refrigerant and oil before installation new unit. Thickness of copper pipes used with R410A must be more than 0.6mm. Never use copper pipes thinner than 0.6mm. It is desirable that the amount of residual oil is less than 40 mg/10m.

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

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

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

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

Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.

Must not use other parts except original parts describe in catalog and manual.

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

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

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

Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.

Select an installation location which is easy for maintenance.

Pb free solder has a higher melting point than standard solder; typically the melting point is 50°F – 70°F (30°C – 40°C) higher. Please use a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C). Pb free solder will tend to splash when heated too high (about 1100°F / 600°C).

Power supply connection to the air conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following methods. Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries, permanent connection of this room air conditioner to the power supply is prohibited.

i. Power supply connection to the receptacle using a power plug. Use an approved 15/16A (1.0 ~ 1.75HP) or 16A (2.0HP) or 20A (2.5HP) power plug with earth pin for the connection to the socket.

ii. Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A (1.0 ~ 2.0HP) or 20A (2.5HP) circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.0 mm contact gap.

Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts. Take care of the liquid refrigerant, it may cause frostbite.

Installation or servicing work: It may need two people to carry out the installation or servicing work.

Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

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

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

The specifications for Capacity, Running Current, Input Power, EER, Power Factor, Indoor Noise, and Outdoor Noise for the PANASONIC CU-E15HBEA in Cooling Mode at 230V are as follows:

The specifications for Capacity, Running Current, Input Power, COP, Power Factor, Indoor Noise, and Outdoor Noise for the PANASONIC CU-E15HBEA in Heating Mode at 230V are as follows:

The Compressor Output Power (W) for the PANASONIC CU-E15HBEA is 900 W.

The Indoor Operation Range for Cooling for the PANASONIC CU-E15HBEA based on Dry Bulb and Wet Bulb temperatures is:

The Indoor Operation Range for Heating for the PANASONIC CU-E15HBEA based on Dry Bulb temperature is:

The Outdoor Operation Range for Cooling for the PANASONIC CU-E15HBEA based on Dry Bulb and Wet Bulb temperatures is:

The Outdoor Operation Range for Heating for the PANASONIC CU-E15HBEA based on Dry Bulb and Wet Bulb temperatures is:

The typical indoor fan speeds (rpm) for the PANASONIC CU-E15HBEA in Cooling/Dry mode are:

The typical indoor fan speeds (rpm) for the PANASONIC CU-E15HBEA in Heating mode are:

The outdoor fan speed (rpm) for the PANASONIC CU-E15HBEA in Cooling mode (Hi Speed) is 800 rpm.

The outdoor fan speed (rpm) for the PANASONIC CU-E15HBEA in Heating mode (Hi Speed) is 790 rpm.

The Moisture Removal rate (L/h) for the PANASONIC CU-E15HBEA in Cooling mode is 1.5 L/h (3.2 Pt/h).

The Indoor Airflow (m3/min) values for the PANASONIC CU-E15HBEA in Cooling mode are:

The Indoor Airflow (m3/min) values for the PANASONIC CU-E15HBEA in Heating mode are:

The Outdoor Airflow (m3/min) values for the PANASONIC CU-E15HBEA are:

For the PANASONIC CU-E15HBEA:

• Pipe Diameter (Liquid / Gas): 6.35 mm (1/4″) / 9.52 mm (3/8″)
• Standard Length: 7.5 m (24.6 ft)
• Length Range (min – max): 3 m (9.8 ft) ~ 20 m (65.6 ft)
• I/D & O/D Height Different: 15 m (49.2 ft)

When installing the PANASONIC CU-E15HBEA air conditioner, the following procedure must be followed to evacuate the air inside the indoor unit and pipes:

1. Connect a charging hose with a push pin to the Low and High side of a charging set and the service port of the 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump and vacuum pump adaptor.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not move after approximately five minutes. Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of both of the 3-way valve at a torque of 18 N m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
9. Be sure to check for gas leakage.

If the gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa) in step 3, take the following measures:

• If the leak stops when the piping connections are tightened further, continue working from step 4.
• If the leak does not stop when the connections are re-tightened, repair the location of leak.

Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.

The Test Run operation for the PANASONIC CU-E15HBEA will be activated by short-circuiting CN-S at the outdoor unit PCB after applying power between the terminal 1 and 2. The unit is then forced to run in the rated frequency cooling operation mode.

The F98 error code for Total Running Current Protection in the PANASONIC CU-E15HBEA is triggered during operation of cooling and heating, when an input over-current (15.06A) is detected by checking the input current value being detected by current transformer (CT) with the compressor running.

• Over-current due to compressor failure.
• Over-current due to defective outdoor unit PCB.
• Over-current due to defective inverter main circuit electrolytic capacitor.
• Over-current due to excessive refrigerant.

Troubleshooting steps when the F98 indication happens for the PANASONIC CU-E15HBEA:

1. Get restarted and measure the input current.
2. If Input current > 15.06A:
   • Turn off power supply. Check the main circuit electrolytic capacitor.
   • If Normal: Repair the pipe flare or union nuts. Reclaim and recharge refrigerant.
   • If No: Check refrigerant amount.
   • If Excess refrigerant?: Replace outdoor unit PCB or Replace outdoor unit compressor.
3. If Input current is NOT > 15.06A: Replace the outdoor unit PCB.

Troubleshooting steps when the abnormality indication starts again for H11 (Indoor/Outdoor Abnormal Communication) on the PANASONIC CU-E15HBEA:

1. Check the indoor-outdoor units’ connection wires.
2. If there is any wiring error (YES): Correct the indoor-outdoor units connection wires.
3. If there is no wiring error (NO): Disconnect terminal 3 wire and measure Vdc between terminal 2 & 3 from the outdoor unit.
   • If the Vdc fluctuates between 20-70Vdc (YES): Replace outdoor PCB.
   • If the Vdc does not fluctuate between 20-70Vdc (NO): Reconnect terminal 3 wire and measure Vdc between terminal 2 & 3 from the outdoor unit.
     • If the Vdc fluctuates between 20-50Vdc (YES): Replace indoor unit PCB.
     • If the Vdc does not fluctuate between 20-50Vdc (NO): Replace indoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H12 (Indoor/Outdoor Capacity Rank Mismatched) on the PANASONIC CU-E15HBEA:

1. Check the indoor and outdoor unit connection wires.
2. If there is any wiring error (YES): Correct the indoor-outdoor units connection wires.
3. If there is no wiring error (NO): Check indoor and outdoor units model number.
   • If indoor unit and outdoor unit model numbers matched (YES): Check the spare part numbers of the indoor and outdoor unit PCBs and compare with their Part data.
     • If Matched compatibility (YES): Procedure complete.
     • If Matched compatibility (NO): Change for the specified indoor or outdoor unit PCB.
   • If indoor unit and outdoor unit model numbers did not match (NO): Match the compatible model(s).
4. If no wiring error is found and models do not match, or if PCBs are not matched/defective: Replace the indoor and outdoor unit PCBs.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H14 (Indoor Intake Air Temperature Sensor Abnormality) on the PANASONIC CU-E15HBEA:

1. Check the connector connection: Turn off the power. Check the connector connection.
2. If the connector connection is normal (YES): Check the indoor air temperature sensor: Plug out connector from the indoor unit PCB. Measure the resistance of the indoor intake air temperature sensor.
   • If the measured resistance of the indoor intake air temperature sensor matches the value specified in its characteristic chart (YES): Procedure complete.
   • If the measured resistance of the indoor intake air temperature sensor does not match the value specified in its characteristic chart (NO): Defect in indoor intake air temperature sensor. Replace the indoor intake air temperature sensor. Or Detect in indoor unit PCB. Replace the indoor unit PCB.
3. If the connector connection is not normal (NO): Connector poor contact. Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H15 (Compressor Temperature Sensor Abnormality) on the PANASONIC CU-E15HBEA:

1. Check the connector connection: Turn off the power. Check the connector connection.
2. If the connector connection is normal (YES): Check the outdoor compressor temperature sensor: Plug out connector from the outdoor unit PCB. Measure the resistance of the outdoor compressor temperature sensor.
   • If the measured resistance of the outdoor compressor temperature sensor matches the value specified in its characteristic chart (YES): Procedure complete.
   • If the measured resistance of the outdoor compressor temperature sensor does not match the value specified in its characteristic chart (NO): Defect in outdoor compressor temperature sensor. Replace the outdoor compressor temperature sensor. Or Defect in outdoor unit PCB. Replace the outdoor unit PCB.
3. If the connector connection is not normal (NO): Connector poor contact. Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H16 (Outdoor Current Transformer Open Circuit) on the PANASONIC CU-E15HBEA:

1. Operate normal heating operation. When H16 occurs again, turn OFF the power.
2. Check the 2/3 way valve.
   • If the 2/3 way valve closed (YES): Open the 2/3 way valve.
   • If the 2/3 way valve is not closed (NO): Check for gas leakage.
     • If Oil oozing out from the 2/3 way valve (YES): Repair the pipe flare or union nuts. Reclaim and recharge refrigerant.
     • If Oil oozing out from the 2/3 way valve (NO): While the system is still in FORCE HEATING, check the discharge pressure.
       • If pressure unchanged (same as when compressor stop) (NO): Replace the outdoor unit PCB.
       • If pressure is unchanged (YES): While the system is still in FORCE HEATING, further check (by touching): Compressor discharge pipe is cold. Compressor body is warm. To confirm the compressor low compression. Replace the compressor.
3. Measure the current from the outdoor LIVE terminal.
   • If the current < 1.0A (YES): Defect in CT. Replace the outdoor unit PCB.
   • If the current is NOT < 1.0A (NO): While the system is still in FORCE HEATING, check the discharge pressure.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when abnormality indication starts again for H19 (Indoor Fan Motor – DC Motor Mechanism Locked) on the PANASONIC CU-E15HBEA:

1. Turn off power supply and rotate fan by hand.
2. If the fan does not rotate smoothly (NO): Replace fan motor.
3. If the fan rotates smoothly (YES): Turn power supply on and operate fan.
   • If it rotates (YES): Stop fan motor.
   • If it does not rotate (NO): Turn off power supply and disconnect fan motor connector, then turn power on. Check the rotation feedback output from fan motor.
     • If the rotation feedback voltage 15VDC (pin 1 & 4) generated (YES): Rotate the fan motor by hand, is the rotation feedback voltage 15VDC (pin 7 & 4) generated?
       • If the rotation feedback voltage 15VDC (pin 7 & 4) generated (YES): Procedure complete.
       • If the rotation feedback voltage 15VDC (pin 7 & 4) generated (NO): Check the output of fan motor from indoor PCB.
         • If motor power supply voltage -325Vdc (pin 1 & 4) generated? (NO): Is the motor control voltage 15Vdc (pin 3 & 4) generated? (NO): Operate the fan, is the rotation command voltage 1-5Vdc (pin 2 & 4) generated? (NO): Replace indoor PCB. If (YES): Replace fan motor.
         • If motor power supply voltage -325Vdc (pin 1 & 4) generated? (YES): Replace indoor PCB.

Troubleshooting steps when the abnormality indication starts again for H27 (Outdoor Air Temperature Sensor Abnormality) on the PANASONIC CU-E15HBEA:

1. Check the connector connection: Turn off the power. Check the connector connection.
2. If the connector connection is normal (YES): Check the outdoor air temperature sensor: Plug out connector from the outdoor unit PCB. Measure the resistance of the outdoor air temperature sensor.
   • If the measured resistance of the outdoor air temperature sensor matches the value specified in its characteristic chart (YES): Procedure complete.
   • If the measured resistance of the outdoor air temperature sensor does not match the value specified in its characteristic chart (NO): Defect in outdoor air temperature sensor. Replace the outdoor air temperature sensor. Or Detect in outdoor unit PCB. Replace the outdoor unit PCB.
3. If the connector connection is not normal (NO): Connector poor contact. Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H28 (Outdoor Pipe Temperature Sensor Abnormality) on the PANASONIC CU-E15HBEA:

1. Check the connector connection: Turn off the power. Check the connector connection.
2. If the connector connection is normal (YES): Check the outdoor heat exchanger temperature sensor: Plug out connector from the outdoor unit PCB. Measure the resistance of the outdoor heat exchanger temperature sensor.
   • If the measured resistance of the outdoor heat exchanger temperature sensor matches the value specified in its characteristic chart (YES): Procedure complete.
   • If the measured resistance of the outdoor heat exchanger temperature sensor does not match the value specified in its characteristic chart (NO): Defect in outdoor heat exchanger temperature sensor. Replace the outdoor heat exchanger temperature sensor. Or Defect in outdoor unit PCB. Replace the outdoor unit PCB.
3. If the connector connection is not normal (NO): Connector poor contact. Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when the abnormality indication starts again for H30 (Compressor Discharge Temperature Sensor Abnormality) on the PANASONIC CU-E15HBEA:

1. Check the connector connection: Turn off the power. Check the connector connection.
2. If the connector connection is normal (YES): Check the outdoor discharge pipe temperature sensor: Plug out connector from the outdoor unit PCB. Measure the resistance of the outdoor discharge pipe temperature sensor.
   • If the measured resistance of the outdoor discharge pipe temperature sensor matches the value specified in its characteristic chart (YES): Procedure complete.
   • If the measured resistance of the outdoor discharge pipe temperature sensor does not match the value specified in its characteristic chart (NO): Defect in outdoor discharge pipe temperature sensor. Replace the outdoor discharge pipe temperature sensor. Or Defect in outdoor unit PCB. Replace the outdoor unit PCB.
3. If the connector connection is not normal (NO): Connector poor contact. Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when abnormality indication starts again for H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) on the PANASONIC CU-E15HBEA:

1. Turn off power supply and rotate fan by hand.
2. If the fan does not rotate smoothly (NO): Replace fan motor.
3. If the fan rotates smoothly (YES): Turn power supply on and operate fan.
   • If it rotates (YES): Stop fan motor.
   • If it does not rotate (NO): Turn off power supply and disconnect fan motor connector, then turn power on. Check the rotation feedback output from fan motor.
     • If the rotation feedback voltage 15VDC (pin 1 & 4) generated (YES): Is the rotation feedback voltage 15VDC (pin 7 & 4) generated?
       • If YES: Procedure complete.
       • If NO: Check the output of fan motor from indoor PCB.
         • If Is the motor power supply voltage -325Vdc (pin 1 & 4) generated? (NO): Is the motor control voltage 15Vdc (pin 3 & 4) generated? (NO): Operate the fan, is the rotation command voltage 1-5Vdc (pin 2 & 4) generated? (NO): Replace indoor PCB. If (YES): Replace fan motor.
         • If motor power supply voltage -325Vdc (pin 1 & 4) generated? (YES): Replace indoor PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps for H98 (Indoor High Pressure Protection) on the PANASONIC CU-E15HBEA:

1. Check the air passage.
   • If there is any short circuit (YES): Provide sufficient air passage.
   • If there is no short circuit (NO): Check the indoor unit air filter.
     • If the air filter dirty (YES): Clean the air filter.
     • If the air filter is not dirty (NO): Check the dust accumulation on the indoor unit heat exchanger.
       • If the indoor unit heat exchanger dirty (YES): Clean the indoor unit heat exchanger.
       • If the indoor unit heat exchanger is not dirty (NO): Check the 2/3 way valve.
         • If the 2/3 way valve closed (YES): Open the 2/3 way valve.
         • If the 2/3 way valve is not closed (NO): Check the indoor unit fan motor operation.
           • If the indoor unit fan motor operate normally (YES): Check refrigerant amount.
             • If the additional refrigerant amount filled correctly? (NO): Reclaim and recharge with correct amount of refrigerant.
             • If the additional refrigerant amount filled correctly? (YES): Check for clogged expansion valve or strainer.
               • If the expansion valve or strainer clogged (ice formed)? (YES): Replace the expansion valve and/or strainer. Reclaim and recharge refrigerant.
               • If the expansion valve or strainer clogged (ice formed)? (NO): Check the indoor pipe temperature sensor.
                 • If it does not conform to the sensor characteristic chart? (NO): Replace the indoor pipe temperature sensor.
                 • If it does conform to the sensor characteristic chart? (YES): Replace the indoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps for H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry) on the PANASONIC CU-E15HBEA:

1. Check the air passage.
   • If there is any short circuit? (YES): Provide sufficient air passage.
   • If there is no short circuit? (NO): Check the indoor unit air filter.
     • If the air filter dirty? (YES): Clean the air filter.
     • If the air filter is not dirty? (NO): Check the dust accumulation on the indoor unit heat exchanger.
       • If the indoor unit heat exchanger dirty? (YES): Clean the indoor unit heat exchanger.
       • If the indoor unit heat exchanger is not dirty? (NO): Check the 2/3 way valve.
         • If the 2/3 way valve closed? (YES): Open the 2/3 way valve.
         • If the 2/3 way valve is not closed? (NO): Check the indoor unit fan motor operation.
           • If the indoor unit fan motor operate normally? (YES): Check for gas leakage.
             • If gas leakage? (YES): Repair the pipe flare or union nuts. Reclaim and recharge refrigerant.
             • If no gas leakage? (NO): Check for clogged expansion valve or strainer.
               • If the expansion valve or strainer clogged (ice formed)? (YES): Replace the expansion valve and/or strainer. Reclaim and recharge refrigerant.
               • If the expansion valve or strainer clogged (ice formed)? (NO): Check the indoor pipe temperature sensor.
                 • If it does not conform to the sensor characteristic chart? (NO): Replace the indoor pipe temperature sensor.
                 • If it does conform to the sensor characteristic chart? (YES): Replace the indoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

The Malfunction Decision Conditions for F11 (4-way valve Abnormality) on the PANASONIC CU-E15HBEA are:

• When heating operation, when indoor pipe temperature is below 10°C.
• When cooling operation, when indoor pipe temperature is above 45°C.

Troubleshooting steps when F11 indication happens for the PANASONIC CU-E15HBEA:

1. Check the indoor pipe temperature sensor.
   • If it does not conform to the sensor characteristic chart (NO): Replace the indoor pipe temperature sensor.
   • If it conforms to the sensor characteristic chart (YES): Check is the 4-way valve coil energized during cooling operation?
     • If YES: Check the continuity of the 4-way valve coil.
       • If the continuity is checked (YES): Disconnect the harness from the connector. Resistance between harnesses about 180Ω?
         • If YES: Replace the 4-way valve coil.
         • If NO: Measure DC voltage supply to CN-HOT (pin1 & 2) during heating operation.
           • If the voltage supply to 4-way valve 2.5-4.5Vdc (YES): Replace the outdoor unit PCB.
           • If the voltage supply to 4-way valve is NOT 2.5-4.5Vdc (NO): Replace the 4-way valve.
       • If the 4-way valve coil is energized during cooling operation (NO): Replace the outdoor unit PCB.
     • If F11 occurs during heating operation?
       • If YES: Check harness out of connector?
         • If YES: Reconnect the harness.
         • If NO: Check the continuity of the 4-way valve coil.
       • If NO: Replace the outdoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when F91 indication happens for the PANASONIC CU-E15HBEA:

1. Check the indoor air intake and pipe temperature sensors.
   • If it does not conform to the sensor characteristic chart? (NO): Replace the indoor intake air or pipe temperature sensor.
   • If it conforms to the sensor characteristic chart? (YES): Check 2/3-way valve opened?
     • If YES: Check for gas leaking.
       • If oil oozing out from the 2/3 way valve? (YES): Repair the pipe flare or union nuts. Reclaim and recharge refrigerant.
       • If oil oozing out from the 2/3 way valve? (NO): Capillary tube or dryer clogged?
         • If YES: Replace the capillary tube or dryer.
         • If NO: Charge for a specified amount of fresh refrigerant.
           • If Refrigerant cycle abnormality error again? (YES): Replace outdoor unit PCB & compressor.
           • If Refrigerant cycle abnormality error again? (NO): Procedure complete.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when F93 indication happens for the PANASONIC CU-E15HBEA:

1. Check the U, V and W connector connection: Turn OFF the power. Check the U, V and W connection at outdoor unit PCB and compressor terminal.
   • If the connector connection is normal (YES): Disconnect the harnesses U, V and W from the compressor terminal. Turn ON the power and operate inverter checker. Is blinking of the 6 LEDs in same sequence/condition?
     • If YES: Replace compressor.
     • If NO: IPM defective. Replace outdoor unit PCB.
   • If the connector connection is not normal (NO): Correct the connection.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Regarding checking the power transistor:

• Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
• If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using the tester.
• For the UVW, make measurement at the Faston terminal on the board of the relay connector.

Troubleshooting steps when F95 indication happens for the PANASONIC CU-E15HBEA:

1. Check the outdoor air passage.
   • If there is any short circuit? (YES): Provide sufficient air passage.
   • If there is no short circuit? (NO): Check the dust accumulation on the outdoor unit heat exchanger.
     • If the outdoor unit heat exchanger dirty? (YES): Clean the outdoor heat exchanger.
     • If the outdoor unit heat exchanger is not dirty? (NO): Check the 2/3 way valve closed?
       • If YES: Open the 2/3 way valve.
       • If NO: Check the outdoor unit fan motor operation.
         • If the fan motor operate normally? (YES): Check refrigerant amount.
           • If the additional refrigerant amount filled correctly? (NO): Reclaim and recharge with correct amount of refrigerant.
           • If the additional refrigerant amount filled correctly? (YES): Check for clogged expansion valve or strainer.
             • If the expansion valve or strainer clogged (ice formed)? (YES): Replace the outdoor fan motor.
             • If the expansion valve or strainer clogged (ice formed)? (NO): Check the outdoor pipe temperature sensor.
               • If it does not conform to the sensor characteristic charts? (NO): Replace the outdoor pipe temperature sensor.
               • If it does conform to the sensor characteristic charts? (YES): Replace the outdoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when F96 indication happens for the PANASONIC CU-E15HBEA:

1. Check the outdoor unit installation environment during cooling or soft dry operation.
   • If there is any improper heat radiation? (YES): Reinstall the outdoor unit. Remove the obstacle(s). Clean the outdoor heat exchanger.
   • If there is no improper heat radiation? (NO): Is outdoor fan motor operating?
     • If YES: Defect in IPM. Replace the outdoor unit PCB.
     • If NO: Replace the outdoor fan motor.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when F97 indication happens for the PANASONIC CU-E15HBEA:

1. Check the compressor tank temperature sensor.
   • If it does not conform to the sensor characteristic chart? (NO): Replace the compressor tank temperature sensor.
   • If it conforms to the sensor characteristic chart? (YES): Check 2/3 way valve closed?
     • If YES: Open the 2/3 way valve.
     • If NO: Check for gas leakage.
       • If oil oozing out from the 2/3 way valve? (YES): Repair the pipe flare or union nuts. Reclaim and recharge refrigerant.
       • If oil oozing out from the 2/3 way valve? (NO): Capillary tube or dryer clogged?
         • If YES: Replace the capillary tube or dryer.
         • If NO: Charge for a specified amount of fresh refrigerant.
           • If Refrigerant cycle abnormality error again? (YES): Replace outdoor unit PCB or Replace outdoor unit compressor.
           • If Refrigerant cycle abnormality error again? (NO): Procedure complete.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

• Wider output power range
• Energy saving
• Quick Cooling
• Quick Heating
• More precise temperature control

• Random auto restart after power failure for safety restart operation
• Gas leakage protection
• Prevent compressor reverse cycle
• Inner protector to protect compressor
• Noise prevention during soft dry operation

• Quiet mode to reduce the indoor unit operating sound
• Powerful mode to reach the desired room temperature quickly
• 24-hour timer setting

• Breakdown Self Diagnosis function

To check the drainage for the PANASONIC CU-E15HBEA after connecting the power supply:

1. Pour approximately 600 cc of water into the drain pan of the main unit using a squeeze bottle, etc.
2. Press the drain test run switch on the control board in the control box to start the drain motor and check whether the water drains normally. (The drain motor operates for approximately 5 minutes and then stops automatically.)

For the PANASONIC CU-E15HBEA:

• Carry out insulation at the pipe connection portion as mentioned in the Indoor/Outdoor Unit Installation Diagram. Wrap the insulated piping end to prevent water from going inside the piping.
• If the drain hose or connecting piping is in the room (where dew may form), increase the insulation by using POLY-E FOAM with thickness 8 mm or above.

For the PANASONIC CU-E15HBEA:

• If a drain elbow is used, the unit should be placed on a stand which is taller than 3 cm.
• If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in succession, it is recommended not to use a drain elbow, for the drain water freezes and the fan will not rotate.

For the PANASONIC CU-E15HBEA in Cooling/Soft Dry (A) & (C) operation mode:

• If total outdoor unit running current exceeds X (7.79 A), the frequency instructed for compressor operation will be decreased.
• If the running current does not exceed X value for five seconds, the frequency instructed will be increased.
• If total outdoor unit running current exceeds Y (15.06 A), the compressor will be stopped immediately for 3 minutes.
• The first 30 minutes of cooling operation, (A) will be applied.

For the PANASONIC CU-E15HBEA:

1. When the IPM temperature rises to 110°C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95°C.

For the PANASONIC CU-E15HBEA DC Peak Current Control:

1. When electric current to IPM exceeds set value of 22.33 ± 5.0 A, the compressor will stop operate. Then, operation will restart after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after two minutes.
3. If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute. If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.

Troubleshooting steps when abnormality indication starts again for H12 (Indoor/Outdoor Capacity Rank Mismatched) on the PANASONIC CU-E15HBEA:

1. Check the indoor and outdoor unit connection wires.
2. If there is any wiring error (YES): Correct the indoor-outdoor units connection wires.
3. If there is no wiring error (NO): Check indoor and outdoor units model number.
   • If indoor unit and outdoor unit model numbers matched (YES): Check the spare part numbers of the indoor and outdoor unit PCBs and compare with their Part data.
     • If Matched compatibility (YES): Procedure complete.
     • If Matched compatibility (NO): Change for the specified indoor or outdoor unit PCB.
   • If indoor unit and outdoor unit model numbers did not match (NO): Match the compatible model(s).
4. If no wiring error is found and models do not match, or if PCBs are not matched/defective: Replace the indoor and outdoor unit PCBs.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Troubleshooting steps when F99 indication happens for the PANASONIC CU-E15HBEA:

1. Get restarted and measure the input current.
2. If Input current > 20.2A? (YES): Check the compressor winding resistance: Turn off the power and disconnect the harness U, V and W. Measure the winding resistance between U-V, V-W and W-U.
   • Are the compressor’s winding resistance (U-V, V-W, W-U) uniform? (YES): Compressor defective due to winding shorted. Replace compressor.
   • Are the compressor’s winding resistance (U-V, V-W, W-U) uniform? (NO): Outdoor electronic circuit defect due to power transistor. Replace the outdoor unit PCB.
3. If Input current is NOT > 20.2A? (NO): Replace the outdoor unit PCB.

For safety reason and to prevent component breakdown, always switch off the power before remove and connect the component.

Regarding checking the power transistor:

• Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
• If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using the tester.
• For the UVW, make measurement at the Faston terminal on the board of the relay connector.