Installation guide

Figure17
Status LED
Green "POWER"
Red "TRIP"
Yellow "ALERT"
Flash Code 1
Yellow "ALERT"
Flash Code 2
Yellow "ALERT"
Flash Code 3
Yellow "ALERT"
Flash Code 4
Yellow "ALERT"
Flash Code 5
Comfort Alert TM Diagnostics (some models)
Statue LED Description
Module has power
Thermostat demand signal
Y1 is present, but the com-
0ressor is not running
Long Run Time
Compressor is running ex-
tremely long run cycles
System Pressure Trip
Discharge or suction pres-
sure out of limits or com-
0ressor overloaded
Short Cycling 1.
Compressor is running only 2.
briefly 3.
4.
Locked Rotor 1.
2.
3.
4.
Open Circuit 1.
2.
3,
4,
5,
6,
7,
Yellow "ALERT" Open Start Circuit 1.
Flash Code 6 Current only in run circuit 2.
3.
Yellow "ALERT" Open Run Circuit 1.
Flash Code 7 Current only in start circuit 2.
Yellow "ALERT" Welded Contactor 1.
Flash Code 8 Compressor always runs 2.
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
Thermostat demand signal is intermittent
Time delay relay or control board defective
If high pressure switch present go to Flash Code 2 informa-
tion
If low pressure switch present go to Flash Code 1 informa-
tion
Run capacitor has failed
Low line voltage (contact utility if voltage at disconnect is low)
Excessive liquid refrigerant in compressor
Compressor bearings are seized
Outdoor unit power disconnect is open
Compressor circuit breaker or fuse(s) is open
Compressor contactor has failed open
High pressure switch is open and requires manual reset
Open circuit in compressor supply wiring or connections
Unusually long compressor protector reset time due to ex-
treme ambient temperature
Compressor windings are damaged
Run capacitor has failed
Open circuit in compressor start wiring or connections
Compressor start winding is damaged
Open circuit in compressor run wiring or connections
Compressor run winding is damaged
Compressor contactor has failed closed
Thermostat demand signal not connected to module
Yellow "ALERT" Low Voltage 1. Control circuit transformer is overloaded
Flash Code 9 Control circuit < 17VAC 2. Low line voltage (contact utility if voltage at disconnect is low)
• Flash Code number corresponds to a number of LED flashes, followed by a pause and then repeated.
• TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation.
• Reset ALERT Flash code by removing 24VAC power from module.
• Last ALERT Flash code is displayed for 1 minute after module is powered on.
14 428 01 5100 01