Remote

Alarm

 

controller

Judgment condition

contents

alarm display

 

 

 

P29

Current detection

Inverter stops after alarm is

 

circuit trouble

detected. Alarm is output

 

• AC current value is

when inverter stops (pre-trip)

 

high even when

consecutively 4 times.

 

compressor is

 

 

stopped.

 

 

 

4. Service procedures

Clear condition

Judgment and correction

Recovery at restart

1. Stops immediately when

 

restarted.

 

• Layer short in the

 

compressor

 

2. Check inverter control PCB.

 

• Wiring trouble

F04

4

F06

F07

F08

Compressor motor output trouble, Inverter compressor trouble,

MDC trouble

Compressor does not run. (Overcurrent protection circuit activates after a certain period of time following compressor start.)

Compressor breakdown

Starts to operate but operating frequency drops and compressor stops.

Inverter control PCB position detection circuit trouble

Disconnection, open circuit, or short circuit in discharge temp. sensor (TD)

Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C1)

Disconnection, open circuit, or short circuit in outdoor heat exchanger temp. sensor (C2)

Disconnection, open circuit, or short circuit in outdoor air temp. sensor (TO)

Inverter stops after alarm is detected.

Inverter stops after alarm is detected.

Inverter stops after alarm is detected.

Inverter stops after alarm is detected.

26, 36 MODEL:

Sensor detection trouble (194°F or higher when 15 minutes have elapsed after compressor stopped). (Open circuit)

42 MODEL:

Sensor defection trouble (194°F or higher when 60 minutes have elapsed after compressor stopped). (Open circuit)

Open circuit or short circuit

Open circuit or short circuit

Open circuit or short circuit

Recovery at restart 1. Refrigerant cycle trouble, overload operation

2.Loose screws and contact failure between HIC control PCB and radiating plate

3.Cooling failure of radiating plate

4.Check outdoor unit PCB wiring.

Recovery at restart 1. Compressor trouble (locked,

etc.)

Replace the compressor.

2.Compressor wiring trouble (missing phase)

Recovery at restart 1. Check power voltage: AC 203 V ± 20 V or 230 V ± 23 V.

2.Refrigerant cycle overload operation

3.Check AC current detection circuit.

Recovery at restart Position detection circuit is activated even when the compressor 3P connector is disconnected and the compressor operated.

Replace the inverter control PCB.

Automatic recovery 1. Check discharge temp. sensor (TD).

2.Check outdoor unit control PCB.

Automatic recovery 1. Check outdoor heat exchanger temp. sensor (C1).

2.Check outdoor unit control PCB.

Automatic recovery 1. Check outdoor heat exchanger temp. sensor (C2).

2.Check outdoor unit control PCB.

Automatic recovery 1. Check outdoor air temp. sensor (TO).

2.Check outdoor unit control PCB.

F12

Disconnection, open

Open circuit or short circuit

circuit, or short circuit

 

in intake temp. sensor

 

(TS)

 

Automatic recovery 1. Check intake temp. sensor (TS).

2.Check outdoor unit control PCB.

4-6

Page 170
Image 170
Panasonic R410A service manual Alarm

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.