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XC17 SERIES
Table 10. Compressor LED Alert Codes
Outdoor Main
Control LEDs
Condition
Possible
Cause(s)
Solution
Clearing Status
DS15
Yellow
DS13
Red
OFF ON
Compressor
Internal
Overload Trip
Thermostat
demand signal Y1
is present, but
compressor not
running
1
Compressor protector is open.
S Check for high head pressure
S Check compressor supply voltage
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 or high pressure switch open if present in the
system.
6
Compressor contactor has failed to close.
Clears the error after current
is sensed in the run and
start winding for two
seconds, service removed
or power reset.
1 Flashes
then
Pause
OFF Long run time.
Compressor is
running extremely
long run cycles.
1
Low refrigerant charge.
2
Evaporator blower is not running.
S Check blower relay coil and contacts
S Check blower motor capacitor
S Check blower motor for failure or blockage
S Check evaporator blower wiring and connectors
S Check indoor blower control
S Check thermostat wiring for open circuit
3
Evaporator coil is frozen.
S Check for low suction pressure
S Check for excessively low thermostat setting
S Check evaporator airflow (coil blockages or return
air filter)
S Check ductwork or registers for blockage.
4
Faulty metering device.
S Check TXV bulb installation (size, location and
contact)
S Check if TXV/fixed orifice is stuck closed or de-
fective
5
Condenser coil is dirty
.
6
Liquid line restriction (filter drier blocked if present)
.
7
Thermostat is malfunctioning
.
S Check thermostat sub−base or wiring for short cir-
cuit
S Check thermostat installation (location and level)
Clears the error after 30
consecutive normal run
cycles, or after power reset.
2 Flashes
then
Pause
OFF
System
Pressure Trip
Indicates the
compressor
protector is open
or missing supply
power to the
compressor.
1
High head pressure.
S Check high pressure switch if present in system
S Check if system is overcharged with refrigerant
S Check for non−condensable in system
2
Condenser coil poor air circulation (dirty, blocked,
damaged).
3
Condenser fan is not running.
S Check fan capacitor
S Check fan wiring and connectors
S Check fan motor for failure or blockage
4
Return air duct has substantial leakage.
Clears after four
consecutive normal
compressor run cycles, or
after power reset.
3 Flashes
then
Pause
OFF Short Cycling
Compressor is
running less than
three minutes.
1
Thermostat demand signal is intermittent.
2
Time delay relay or Main Control is defective.
3
If high pressure switch is present, see Flash Code 2
information.
Clears after four
consecutive normal
compressor run cycles, or
after power reset.
4 Flashes
then
Pause.
OFF Locked Rotor
Compressor has
a locked out due
to run capacitor
short, bearings
are seized, ex-
cessive liquid re-
frigerant.
1
Run capacitor has failed.
2
Low line voltage (contact utility if voltage at disconnect
is low).
S Check wiring connections
3
Excessive liquid refrigerant in the compressor.
4
Compressor bearings are seized.
Clears after power reset or
four normal compressor
cycles.