White Rodgers Emerson Blue Wireless Easy Install 1F98EZ-1621 Installation Instructions Manual page 12

TROUBLESHOOTING
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White-Rodgers is a division
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
Status LED
Description Comments
Module has power Supply voltage is present at module terminals
1. Compressor protector is open. Check high head pressure and compressor supply
Comfort Interface en-
ergizing "Y" terminal voltage.
2. Check for open unit power disconnect, circuit breaker or fuses, low pressure switch
to call for cool but the
compressor is not run- if present in system or Compressor contact or has failed open.
3. Broken wire or connector not making contact.
ning
1. Low refrigerant charge.
Long Run Time
2. Evaporator blower is not running. Check blower relay, blower motor capacitor,
Compressor is running
extremely long run motor failure or blockage, wiring and connectors, blower control board, Comfort
cycles Interface wiring for open circuit.
3. Evaporator coil is frozen. Check for low suction pressure, low Comfort Interface
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5. Check Comfort Interface sub-base or wiring for short circuit, Comfort Interface
installation (location, level)
6. Faulty TXV (Thermostatic Expansion Valve). Check TXV bulb installation (size,
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1. High head pressure. Check high pressure switch if present in system, overcharge
System Pressure Trip
Discharge or suction with refrigerant, non-condensable in system.
2. Condenser coil poor air circulation (dirty, blocked, damaged)
pressure out of limits or
3. Condenser fan not running. Check fan capacitor, wiring and connectors, motor for
compressor overloaded
failure or blockage.
4. Return air duct has substantial leakage
5. If low pressure switch present in system, check Flash Code 1 information.
1. Comfort Interface demand signal is intermittent
Short Cycling
2. Time delay or control board defective
Compressor is running
3. If high pressure switch present go to Flash Code 2 information
‘Ž› „”‹‡ ›
4. If low pressure switch present go to Flash Code 1 information
1. Run capacitor has failed.
Locked Rotor
2. Low line voltage (contact utility if voltage at disconnect is low) check wiring.
3. Excessive liquid refrigerant in compressor. Compressor bearings are seized,
measure compressor oil level.
1. Open Outdoor unit power disconnect, circuit breaker, fuse(s). Compressor
Open Circuit
contactor failed to open. Check wiring on compressor contactor and between
supply and compressor, contactor failure (burned, pitted), low pilot voltage at
compressor contactor coil.
2. High pressure switch is open and requires manual reset.
3. Unusually long compressor protector reset time due to extreme ambient
temperature.
4. Compressor windings are damaged. Check compressor motor winding resistance.
1. Run capacitor has failed.
Open Start Circuit
2. Open circuit in compressor start wiring or connections. Check wiring and
Current only in run
circuit connectors between supply and the compressor "S" terminal.
3. Compressor start winding is damaged. Check compressor motor winding resistance.
1. Open circuit in compressor run wiring or connections. Check wiring and connectors
Open Run Circuit
Current only in start between supply and the compressor "R" terminal.
2. Compressor run winding is damaged. Check compressor motor winding resistance.
circuit
1. Compressor contactor has failed closed
Welded Contactor
2. Comfort Interface demand signal not connected to module
Compressor always runs
1. Control circuit transformer is overloaded
Low Voltage Control
Circuit < 17 VAC 2. Low line voltage (contact utility if voltage at disconnect is low). Check wiring
connections
Control circuit voltage
too low for operation
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