Maintenance - Lennox Dave Signature Collection XC15 Installation Instructions Manual

Status LED
Status LED Description
Condition
Short Cycling − Compressor is
Yellow Flash Code 3
running only briefly
Yellow Flash Code 4 Locked Rotor
Yellow Flash Code 5 Open Circuit
Open Start Circuit − Current
Yellow Flash Code 6
only in run circuit
Open Run Circuit − Current only
Yellow Flash Code 7
in start circuit
Welded Contactor −
Yellow Flash Code 8
Compressor always runs
Low Voltage − Control circuit
Yellow Flash Code 9
<17VAC
NOTE − Last code will display for 1 minute when power is cycled to module. Power must be on to module for a minimum of 1 minute for code to clear.

Maintenance

WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
Improper installation,
service or maintenance can cause personal injury,
loss of life, or damage to property.
Installation and service must be performed by a
licensed professional installer (or equivalent) or a
service agency.
506044−01 06/08
Status LED Troubleshooting Information
1
Thermostat demand signal is intermittent.
2
Time delay relay or control board is defective.
3
If high pressure switch is present, see Flash Code 2 information.
1
Run capacitor has failed.
2
Low line voltage (contact utility if voltage at disconnect is low).
3
Excessive liquid refrigerant in the compressor.
4
Compressor bearings are seized.
1
Outdoor unit power disconnect is open.
2
Unit circuit breaker or fuse(s) is open.
3
Unit contactor has failed to close.
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 extreme ambient tempera-
ture.
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 start wiring or connections.
2
Compressor start winding is damaged.
1
Compressor contactor failed to open.
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).
adjustment, alteration,
S
Check wiring connections
S
Check compressor contactor wiring and connectors
S
Check for compressor contactor failure (burned, pitted or open)
S
Check wiring and connectors between supply and compressor
S
Check for low pilot voltage at compressor contactor coil
S
Check compressor motor winding resistance
S
Check wiring and connectors between supply and the compressor S" terminal
S
Check compressor motor winding resistance
S
Check wiring and connectors between supply and the compressor R" terminal
S
Check compressor motor winding resistance
S
Check wiring connections
At the beginning of each cooling season, check the system
as follows:
NOTE − Outdoor fan motor is prelubricated and sealed. No
further lubrication is needed.
1. Clean and inspect the outdoor coil. The coil may be
flushed with a water hose. Ensure the power is turned
off before you clean the coil.
2. Check connecting lines and coils for signs of oil leaks.
3. Check wiring for loose connections.
4. Check for correct voltage at unit (unit operating).
5. Check amp−draw outdoor fan motor:
UNIT NAMEPLATE: _________ ACTUAL: __________
NOTE − If owner reports insufficient cooling, the unit should
be gauged and refrigerant charge checked.
INDOOR COIL
1. Clean coil, if necessary.
2. Check connecting lines and coils for signs of oil leaks.
3. Check condensate line and clean, if necessary.
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