Lennox XP19 User Manual

Page 23
XP19 SERIES
Status LED
Condition
Status LED Troubleshooting InformationStatus LED Description
Yellow Flash Code 4 Locked Rotor
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.
Yellow Flash Code 5 Open Circuit
1
Outdoor unit power disconnect is open.
2
Unit circuit breaker or fuse(s) is open.
3
Unit contactor has failed to close.
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
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.
S Check compressor motor winding resistance
Yellow Flash Code 6
Open Start Circuit − Current
only in run circuit
1
Run capacitor has failed.
2
Open circuit in compressor start wiring or connections.
S Check wiring and connectors between supply and the compressor S terminal
3
Compressor start winding is damaged.
S Check compressor motor winding resistance
Yellow Flash Code 7
Open Run Circuit − Current
only in start circuit
1
Open circuit in compressor start wiring or connections.
S Check wiring and connectors between supply and the compressor R terminal
2
Compressor start winding is damaged.
S Check compressor motor winding resistance
Yellow Flash Code 8
Welded Contactor −
Compressor always runs
1
Compressor contactor failed to open.
2
Thermostat demand signal not connected to module.
Yellow Flash Code 9
Low Voltage − Control circuit
<17VAC
1
Control circuit transformer is overloaded.
2
Low line voltage (contact utility if voltage at disconnect is low).
S Check wiring connections
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.
NOTE − Upon Y2 signal detection and after 5 seconds, the LSOM module will send 24 VAC to the solenoid. Once the solenoid is fully energized, the LSOM
module reduces voltage to between 4 to 18 VDC . Every 15 minutes the solenoid voltage will be increase to 24 volts for a few seconds to ensure solenoid
valve is engaged until Y2 signal is no longer present.

Lennox XP19 Specifications

General

Brand	Lennox
Model	XP19
Category	Heat Pump
Language	English