Справочник Пользователя для Nordyne R-410A

17

Green 

“POWER”

Module has 
power

Supply voltage is present at module terminals

Red “TRIP”

Thermostat 
demand signal 
Y is present, but 
compressor is not 
running

• 

Compressor protector is open

• 

Check for high head pressure

• 

Check compressor supply voltage

• 

Outdoor unit power disconnect is open

• 

Compressor circuit breaker or fuse(s) is open

• 

Broken wire or connector is not making contact

• 

Low pressure switch open if present in system

• 

Compressor contactor has failed open

Yellow “ALERT” 

Flash Code 1

Long Run Time 
Compressor is 
running extremely 
long run cycles

• 

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

— 

Check for excessively low thermostat setting

— 

Check evaporator airfl ow (coil blockages or return airfi lter)

— 

Check ductwork or registers for blockage

• 

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

Yellow “ALERT” 

Flash Code 2

System Pressure 
Trip

• 

High head pressure

— 

Check high pressure switch if present in system

— 

Check if system is overcharged with refrigerant

— 

Check for non-condensable in system

Discharge or 
suction

• 

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

pressure out of 
limits

• 

Condenser fan is not running

— 

Check fan capacitor

— 

Check fan wiring and connectors

— 

Check fan motor for failure or blockage

compressor 
overloaded

• 

Return air duct has substantial leakage

• 

If low pressure switch present in system, check Flash Code 
1 information