TROUBLESHOOTING

Status

Status LED

 

Status LED Troubleshooting Information

LED

Description

 

 

 

 

 

 

 

Green

Module has

Supply voltage is present at module terminals

“POWER”

power

 

 

 

 

 

 

 

 

Compressor protector is open

 

Thermostat

Check for high head pressure

 

Check compressor supply voltage

 

demand signal

 

Outdoor unit power disconnect is open

Red “TRIP”

Y is present, but

Compressor circuit breaker or fuse(s) is open

 

compressor is not

 

Broken wire or connector is not making contact

 

running

 

Low pressure switch open if present in system

 

 

 

 

Compressor contactor has failed open

 

 

 

 

 

 

Low refrigerant charge

 

 

Evaporator blower is not running

 

 

 

Check blower relay coil and contacts

 

 

 

Check blower motor capacitor

 

 

 

Check blower motor for failure or blockage

 

 

 

Check evaporator blower wiring and connectors

 

 

 

Check indoor blower control board

 

 

 

Check thermostat wiring for open circuit

 

 

Evaporator coil is frozen

 

 

 

Check for low suction pressure

 

Long Run Time

 

Check for excessively low thermostat setting

Yellow “ALERT”

Compressor is

 

Check evaporator airflow (coil blockages or return airfilter)

Flash Code 1

running extremely

 

Check ductwork or registers for blockage

 

long run cycles

Faulty metering device

 

 

 

Check TXV bulb installation (size, location and contact)

 

 

 

Check if TXV/fi xed orifi ce is stuck closed or defective

 

 

Condenser coil is dirty

 

 

Liquid line restriction (fi lter drier blocked if present in system)

 

 

Thermostat is malfunctioning

 

 

 

Solenoid plug not connected

 

 

 

Y2 not wired at Comfort Alert

 

 

 

Check thermostat sub-base or wiring for short circuit

 

 

 

Check thermostat installation (location, level)

 

 

Comfort Alert failure

 

 

 

 

 

 

High head pressure

 

System Pressure

 

Check high pressure switch if present in system

 

Trip

 

Check if system is overcharged with refrigerant

 

 

 

Check for non-condensable in system

 

 

 

 

 

Discharge or

Condenser coil poor air circulation (dirty, blocked, damaged)

 

suction

 

 

 

Yellow “ALERT”

 

 

 

 

Condenser fan is not running

Flash Code 2

 

pressure out of

 

Check fan capacitor

 

 

 

limits

 

Check fan wiring and connectors

 

 

 

Check fan motor for failure or blockage

 

 

 

 

 

compressor

Return air duct has substantial leakage

 

 

 

 

If low pressure switch present in system, check Flash Code

 

overloaded

 

 

 

1 information

 

 

 

 

Table 4. LED Diagnostics

17

Page 17
Image 17
Nordyne R-410A user manual LED Diagnostics, Led

R-410A specifications

Nordyne R-410A is a widely recognized refrigerant used in modern air conditioning and heat pump systems, known for its efficiency and environmentally friendly attributes. As a hydrofluorocarbon (HFC) refrigerant, R-410A has become the preferred choice for many manufacturers seeking to meet stringent environmental regulations while providing superior cooling performance.

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Another characteristic of R-410A is its ability to operate at lower temperatures, which enhances its versatility. This capability allows for the design of systems that can function efficiently in a wider range of climate conditions. As a result, HVAC technicians and contractors benefit from its reliability and performance, leading to less frequent maintenance and enhanced customer satisfaction.

Lastly, R-410A systems are equipped with advanced components that improve overall functionality. These systems often include variable-speed compressors, which optimize energy use based on cooling demand, and advanced refrigerant management technologies that ensure safe and efficient operation.

In conclusion, Nordyne R-410A stands out as a superior refrigerant due to its energy efficiency, environmental benefits, and adaptability across a range of HVAC applications. As the industry continues to innovate and shift toward sustainable solutions, R-410A remains at the forefront of refrigerant technology, ensuring homeowners and businesses alike enjoy efficient and eco-friendly cooling options.