Comfort Alertt Diagnostics Codes - International comfort products N4A3 Series Installation Instructions Manual

INSTALLATION INSTRUCTIONS
Figure 12
Status LED Status LED Description
Green "POWER" Module has power
Red "TRIP" Thermostat demand signal
Y1 is present, but the com‐
pressor is not running
Yellow "ALERT" Long Run Time
Flash Code 1 Compressor is running ex‐
tremely long run cycles
Yellow "ALERT" System Pressure Trip
Flash Code 2 Discharge or suction pres‐
sure out of limits or com‐
pressor overloaded
Yellow "ALERT" Short Cycling
Flash Code 3 Compressor is running only
briefly
Yellow "ALERT" Locked Rotor
Flash Code 4
Yellow "ALERT" Open Circuit
Flash Code 5
Yellow "ALERT" Open Start Circuit
Flash Code 6 Current only in run circuit
Yellow "ALERT" Open Run Circuit
Flash Code 7 Current only in start circuit
Yellow "ALERT" Welded Contactor
Flash Code 8 Compressor always runs
Yellow "ALERT" Low Voltage
Flash Code 9 Control circuit < 17VAC
S Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated.
S TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
S Reset ALERT Flash code by removing 24VAC power from module.
S Last ALERT Flash code is displayed for 1 minute after module is powered on.
421 01 5101 00
Comfort Alertt Diagnostics (some models)
Status LED Troubleshooting Information
Supply voltage is present at module terminals
1. Compressor protector is open
2. Outdoor unit power disconnect is open
3. Compressor circuit breaker or fuse(s) is open
4. Broken wire or connector is not making contact
5. Low pressure switch open if present in system
6. Compressor contactor has failed open
1. Low refrigerant charge
2. Evaporator blower is not running
3. Evaporator coil is frozen
4. Faulty metering device
5. Condenser coil is dirty
6. Liquid line restriction (filter drier blocked if present in system)
7. Thermostat is malfunctioning
1. High head pressure
2. Condenser coil poor air circulation (dirty, blocked, damaged)
3. Condenser fan is not running
4. Return air duct has substantial leakage
5. If low pressure switch present in system, check Flash Code 1
information
1. Thermostat demand signal is intermittent
2. Time delay relay or control board defective
3. If high pressure switch present go to Flash Code 2 informa‐
tion
4. If low pressure switch present go to Flash Code 1 informa‐
tion
1. Run capacitor has failed
2. Low line voltage (contact utility if voltage at disconnect is low)
3. Excessive liquid refrigerant in compressor
4. Compressor bearings are seized
1. Outdoor unit power disconnect is open
2. Compressor circuit breaker or fuse(s) is open
3. Compressor contactor has failed open
4. High pressure switch is open and requires manual reset
5. Open circuit in compressor supply wiring or connections
6. Unusually long compressor protector reset time due to ex‐
treme ambient temperature
7. Compressor windings are damaged
1. Run capacitor has failed
2. Open circuit in compressor start wiring or connections
3. Compressor start winding is damaged
1. Open circuit in compressor run wiring or connections
2. Compressor run winding is damaged
1. Compressor contactor has failed closed
2. Thermostat demand signal not connected to module
1. Control circuit transformer is overloaded
2. Low line voltage (contact utility if voltage at disconnect is low)
R-410A Split System Air Conditioner
13