TROUBLESHOOTING

(BEFORE CALLING FOR SERVICE)

If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, contact your dealer or service center.

Trouble

Possible Cause

 

Remedy

 

 

 

 

Air conditioner does

1. Power failure.

1.

Restore power.

not run at all.

2. Leakage circuit

2.

Contact service

 

 

breaker tripped.

 

center.

 

3. Line voltage is too

3.

Consult your

 

low.

 

electrician or

 

 

 

dealer.

 

4. Batteries in remote

4.

Replace batteries.

 

controller have run

 

 

 

down.

 

 

 

 

 

OPERATION lamp

Trouble in system.

Contact service

blinks and air

 

center.

conditioner does not

 

 

 

operate.

 

 

 

 

 

 

Compressor runs but

Obstruction in front of

Remove obstruction.

soon stops.

condenser coil.

 

 

 

(Outdoor Unit)

 

 

 

 

 

 

Poor cooling

1. Dirty or clogged air

1.

Clean air filter to

performance.

filter.

 

improve airflow.

 

2. Heat source or

2.

Eliminate heat

 

many people in

 

source if possible.

 

room.

 

 

 

3. Doors and/or

3.

Shut them to keep

 

windows are open.

 

the heat out.

 

4. Obstacle near air

4.

Remove it to ensure

 

intake or air

 

good airflow.

 

discharge port.

 

 

 

5. Thermostat is set

5.

Set the temperature

 

too high for cooling.

 

lower.

 

 

 

Clicking sound is

In cooling operation,

This is normal, and

heard from the air

any plastic parts may

the sound will soon

conditioner.

shrink due to a

disappear.

 

sudden temperature

 

 

 

change. In this event,

 

 

 

a clicking sound may

 

 

 

occur.

 

 

 

 

 

 

OPERATION lamp

The use of cellular

1.

Turn off the power

lights but outdoor unit

phones near the air

 

then restart the air

will not run.

conditioner may cause

 

conditioner after a

 

disturbance to its

 

while.

 

normal operation.

2.

Consult your dealer.

 

 

 

 

 

TIMER lamp blinks

FLOAT SWITCH is

Contact service

(3 sec. interval) and

actived.

center.

air conditioner does

 

 

 

not operate.

 

 

 

 

 

 

 

OPERATING RANGE

The air conditioner is operable within the temperature ranges as listed below:

For Cooling Only Models : CU-KS18NKU

 

Temperature

Indoor air

Outdoor air

 

 

temperature

temperature

 

 

 

 

 

COOLING

Max.

95

°F DB /

115 °F DB

 

 

71

°F WB

 

 

 

 

 

 

 

Min.

67

°F DB /

67 °F DB

 

 

57

°F WB

 

 

 

 

 

For Low Ambient Cooling Models : CU-KS12NK1A, CU-KS18NKUA

 

 

 

 

 

Temperature

Indoor air

Outdoor air

 

 

temperature

temperature

 

 

 

 

 

COOLING

Max.

95

°F DB /

115 °F DB

 

 

71

°F WB

 

 

 

 

 

 

 

Min.

67

°F DB /

0 °F DB

 

 

57

°F WB

 

 

 

 

 

 

For Cooling Only Models : CU-3KS19NBU, CU-4KS24NBU, CU-4KS31NBU

 

Temperature

Indoor air

Outdoor air

 

 

temperature

temperature

 

 

 

 

 

COOLING

Max.

95

°F DB /

115 °F DB

 

 

71

°F WB

 

 

 

 

 

 

 

Min.

67

°F DB /

14 °F DB

 

 

57

°F WB

 

 

 

 

 

 

WIRED REMOTE CONTROLLER

Aseparately sold wired remote controller (CZ-RD515U) used with this air conditioner is also available. If you wish to use the wired remote control function, you will need to purchase the optional wired remote controller.

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Panasonic R410A service manual Troubleshooting

R410A specifications

Panasonic R410A is a refrigerant that has gained significant popularity in the air conditioning and refrigeration industry due to its favorable environmental properties and performance characteristics. Specifically designed to replace the harmful R22 refrigerant, which is being phased out due to its ozone-depleting potential, R410A offers a more eco-friendly alternative without compromising on efficiency or power.

One of the main features of R410A is its high energy efficiency. It operates at a higher pressure than R22, resulting in better heat transfer capabilities. This increased efficiency translates to lower energy consumption, making units using R410A more cost-effective in the long run. Additionally, R410A is known for its ability to provide excellent cooling performance even in high-temperature environments, making it suitable for a variety of applications, from residential air conditioning systems to commercial refrigeration units.

In terms of composition, R410A is a blend of two hydrofluorocarbons (HFCs), namely R32 and R125. This combination not only minimizes ozone depletion potential (ODP) but also reduces global warming potential (GWP) compared to older refrigerants. Panasonic has emphasized the importance of innovative technologies in its products, and R410A aligns perfectly with the company's commitment to developing sustainable solutions.

Panasonic also integrates advanced technologies to optimize the performance of R410A systems. For example, variable speed compressors, known as inverter technology, enhance system efficiency by adjusting the compressor's speed according to the cooling demand. This ensures that energy is only consumed when needed, further reducing operational costs.

Furthermore, R410A has a wide range of applications, including air conditioning systems, heat pumps, and chillers. Its versatility makes it a popular choice among manufacturers and consumers alike. The refrigerant is also compatible with existing R22 equipment, although specific retrofit procedures must be followed to ensure peak performance and reliability.

In conclusion, Panasonic R410A stands out as an innovative refrigerant choice in the HVAC industry, offering a combination of energy efficiency, environmentally friendly properties, and advanced technologies. As regulatory frameworks continue to tighten on greenhouse gas emissions, R410A and similar refrigerants are expected to play a crucial role in shaping a more sustainable future for air conditioning and refrigeration. Its high performance and lower environmental impact solidify its position as a leading refrigerant in contemporary cooling solutions.