Nordyne R-410A Module Wiring Troubleshooting, Outdoor Thermostat if supplied

Page 13

Miswired Module Indication

Recommended Troubleshooting Action

Green LED is not on,

Determine if both R and C module terminals are

module does not power up

connected. Verify voltage is present at module’s R and

 

C terminals. Review 24VAC Power W iring (page 4) for

 

R and C wiring.

 

 

Green LED intermittent,

Determine if R and Y terminals are wired in reverse.

module powers up only

Verify module’s R and C terminals have a constant

when compressor runs

source. Review 24VAC Power W iring (page 4) for R

 

and C wiring.

 

 

TRIP LED is on but system

Verify Y terminal is connected to 24VAC at contactor

and compressor check OK

coil. Verify voltage at contactor coil falls below 0.5VAC

 

when off. Verify 24 VAC is present across Y and C when

 

thermostat demand signal is present. If not, R and C are

 

reverse wired.

 

 

TRIP LED and ALERT LED

Verify R and C terminals are supplied with 19-28VAC.

flashing together

 

 

 

ALERT Flash Code 3

Verify Y terminal is connected to 24VAC at contactor coil.

(Compressor Short Cycling)

Verify voltage at contactor coil falls below 0.5VAC when

displayed incorrectly

off.

 

 

ALERT Flash Code 5, 6 or 7

Check that compressor run and start wires are through

(Open Circuit, Open Start Circuit

module’s current sensing holes. Verify Y terminal is

or Open Run Circuit) displayed

connected to 24VAC at contactor coil. Verify voltage at

incorrectly

contactor coil falls below 0.5VAC when off.

ALERT Flash Code 6 (Open

Check that compressor run and start wires are routed

Start Circuit) displayed for Code 7

through the correct module sensing holes.

(Open Run Circuit) or vice versa

 

ALERT Flash Code 8

Determine if module’s Y terminal is connected. Verify Y

(Welded Contactor)

terminal is connected to 24VAC at contactor coil. Verify

displayed incorrectly

24VAC is present across Y and C when thermostat demand

 

signal is present. If not, R and C are reverse wired. V erify

 

voltage at contactor coil falls below 0.5VAC when off.

 

Review Thermostat Demand Wiring (page 4) for Y and C

 

wiring.

 

 

Table 2. Module Wiring Troubleshooting

for any unusual noises. If present, locate and determine the source of the noise and correct as necessary.

OUTDOOR THERMOSTAT (if supplied)

The outdoor thermostat prevents the electrical auxiliary heat (if used) from operating above a desired set point. Selection of the set point is determined from the building design heat load.

The thermostat is adjustable from 45°F to 0°F. The factory temperature setting is at 40°F.

Defrost Cycle Timer — The defrost cycle timer controls the time interval of the hot gas defrost after the defrost sensor closes. It is located in the lower left corner of the defrost control board. Three interval settings are available: 30 minutes, 60 minutes, and 90 minutes.Time setting selection is dependent on the climate where the unit is being installed.

Example 1. Dry climate of Southern Arizona. A 90 minute setting is recommended.

Example 2. Moist climate of Seattle, Washington. A 30 minute setting is recommended.

To set the cycle timer, place the timing pin on the defrost control board to the desired time interval post.

Note: All units are shipped from the factory with the default time setting of 30 minutes. Maximum heating performance can be achieved by setting the time to 90 minutes.

Defrost Test Procedure

1.Terminals“R”-”C”must have 18-30v present between them in order for time delay and defrost sequences to be initiated.

13

Image 13
Contents Summer Cooling Winter HeatingPage See Figure To Operate Your Heat Pump For HeatingEmergency Heat DefrostTo Shut Offyour Heat Pump To Operate Your Heat Pump for Automatic Cooling HeatingTo Operate the Indoor Blower Continuously To Maintain Your Heat PumpGeneral Information Safety ConsiderationsSite Preparation Installing the Indoor Unit Installing the Outdoor UnitElectrical Connections Startup and Checkout Copper Wire Size AWGStat is used BetweenW2 and E isFor 2-Stage Heater Kits Air Handler LED Description See Figure Comfort AlertTM Diagnostics Select ModelsTroubleshooting RedTRIP Interpreting the Diagnostic LedsDefrost Test Procedure Module Wiring TroubleshootingOutdoor Thermostat if supplied Seer Split System Heat Pump Orifice Usage Anti Short Cycle Timer Test018K 030K 024K042K 036K060K 048KOutdoor Temperature DEG. F Outdoor Temperature DEG. F 042K 060K Page ¢708410p¤
Related manuals
Manual 20 pages 19.69 Kb Manual 20 pages 6.05 Kb

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.

One of the main features of R-410A is its higher energy efficiency compared to older refrigerants like R-22. This efficiency is primarily attributed to its higher pressure capabilities, which allow for improved heat transfer and reduced energy consumption in residential and commercial systems. As energy costs continue to rise, the use of R-410A in HVAC systems offers a viable solution for reducing utility bills while maintaining optimal comfort levels.

R-410A is also non-ozone-depleting, which sets it apart from many traditional refrigerants. While older refrigerants have been phased out due to their potential harm to the ozone layer, R-410A presents a sustainable alternative that aligns with environmental goals. It features a zero ozone depletion potential (ODP), making it a responsible choice for installations concerned with ecological impact.

In terms of technology, R-410A works effectively in both air conditioning and heat pump systems, providing reliable cooling in hot conditions and heat in colder months. It is compatible with a variety of system designs and can excel in both residential and commercial applications. Moreover, the thermodynamic properties of R-410A ensure consistent and reliable performance, regardless of the external temperature fluctuations.

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.