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Lennox XP17-036-230-08 User Manual

Lennox XP17-036-230-08
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Page 17
XP17
Heat Pump Control
LEDs
Clearing Sta
tus
Solution
Possible
Cause(s)
Condition
iComfortt
-enabled
Thermostat
Display
DS15
Yellow
Clearing Sta
tus
Solution
Possible
Cause(s)
Condition
iComfortt
-enabled
Thermostat
Display
DS13
Red
1 flash
then
pause
Off
Critical Alert
Code 401
Long run
time.
Compressor is
running extreme
ly long run
cycles.
1
Low refrigerant charge.
2
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 connec
tors
Check indoor blower control
Check thermostat wiring for open circuit
3
Evaporator coil is frozen.
Check for low suction pressure
Check for excessively low thermostat setting
Check evaporator airflow (coil blockages or re
turn air filter)
Check ductwork or registers for blockage.
4
Faulty metering device.
Check TXV bulb installation (size, location and
contact)
Check if TXV/fixed orifice is stuck closed or de
fective
5
Condenser coil is dirty
.
6
Liquid line restriction (filter drier blocked if pres
ent)
.
7
Thermostat is malfunctioning
.
Check thermostat sub-base or wiring for short
circuit
Check thermostat installation (location and
level)
Clears the error
after 30 consec
utive normal run
cycles, or after
power reset.
2 flashes
then
pause
Off
Critical Alert
Code 402
System
pressure trip
Indicates the
compressor
protector is open
or missing supply
power to the
compressor.
1
High head pressure.
Check high pressure switch if present in sys
tem
Check if system is overcharged with refriger
ant
Check for non-condensable in system
2
Condenser coil poor air circulation (dirty,
blocked, damaged).
3
Condenser fan is not running.
Check fan capacitor
Check fan wiring and connectors
Check fan motor for failure or blockage
4
Return air duct has substantial leakage.
Clears after four
consecutive
normal com
pressor run
cycles, or after
power reset.
3 flashes
then
pause
Off
Moderate
Alert Code
403
Short cycling
Compressor is
running less than
three minutes.
1
Thermostat demand signal is intermittent.
2
Time delay relay or heat pump control is defec
tive.
3
If high pressure switch is present, see flash code
2 information.
Clears after four
consecutive
normal com
pressor run
cycles, or after
power reset.
4 flashes
then
pause
Off
Critical Alert
Code 404
Locked rotor
Compressor has
a locked out due
to run capacitor
short, bearings
are seized,
excessive liquid
refrigerant.
1
Run capacitor has failed.
2
Low line voltage (contact utility if voltage at
disconnect is low).
Check wiring connections
3
Excessive liquid refrigerant in the compressor.
4
Compressor bearings are seized.
Clears after
power reset or
four normal
compressor
cycles.

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Lennox XP17-036-230-08 Specifications

General IconGeneral
BrandLennox
ModelXP17-036-230-08
CategoryHeat Pump
LanguageEnglish

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