Nortek R6GF Series, Руководство по установке

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Status LED Status LED Description Status LED Troubleshooting Information
POWER
(Green LED)
Module has power
Supply voltage is present at module terminals
TRIP
(Red LED)
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
ALERT
Flash Code 1
(Yellow LED)
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 airflow (coil blockages or return air filter)
– Check ductwork or registers for blockage
• Faulty metering device
– Check TXV bulb installation (size, location and contact)
– Check if TXV/fixed orifice is stuck closed or defective
• Condenser coil is dirty
• Liquid line restriction (filter 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
ALERT
Flash Code 2
(Yellow LED)
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
ALERT
Flash Code 3
(Yellow LED)
Short Cycling / Compressor is running only
briefly
• Thermostat demand signal is intermittent
• Low line voltage (contact utility if voltage at disconnect is low)
• Excessive liquid refrigerant in compressor
• Compressor bearings are seized
ALERT
Flash Code 4
(Yellow LED)
Locked Rotor
• Run capacitor has failed
• Low line voltage (contact utility if voltage at disconnect is low)
• Check wiring connections
• Excessive liquid refrigerant in compressor
• Compressor bearings are seized
• Measure compressor oil level
Table 14. LED Diagnostics
Comfort Alert Troubleshooting Tables