Lennox International Inc Dave Lennox Signature Collection XP17 System HEAT PUMPS Vice removed or

Page 43

Table 15. Compressor Fault and Lockout LED Codes and Related icomfort Touch® Thermostat Alert Codes

NOTE able below for duration of fast / slow flashes and pause.

Heat Pump Control

icomfort

 

 

 

 

 

LEDs

 

 

 

 

 

 

 

Touch®

 

Possible

 

 

 

 

 

 

Condition

Solution

Clearing Status

DS15

 

DS13

Thermostat

Cause(s)

 

 

 

 

 

Yellow

 

Red

Display

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Compressor protector is open.

 

 

 

 

 

 

 

 

S Check for high head pressure

Clears the error

 

 

 

 

 

Thermostat

 

S Check compressor supply voltage

after current is

 

 

 

 

 

2 Outdoor unit power disconnect is open.

sensed in the

 

 

 

Moderate/

Compressor

demand signal Y1

Off

 

On

Critical3 Alert

internal

is present, but

3 Compressor circuit breaker or fuse(s) is open.

run and start

 

winding for two

 

 

 

Code 400

overload trip

compressor not

4

 

 

 

 

Broken wire or connector is not making contact.

seconds, ser-

 

 

 

 

 

running

5

Low or high pressure switch open if present in the

vice removed or

 

 

 

 

 

 

 

 

 

 

 

 

 

system.

power reset.

 

 

 

 

 

 

6

Compressor contactor has failed to close.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 connec-

 

 

 

 

 

 

 

 

tors

 

 

 

 

 

 

 

 

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

Clears the error

1 flash

 

 

Critical Alert

 

Compressor is

 

S Check evaporator airflow (coil blockages or re-

after 30 consec-

 

Off

Long run time.

running extremely

 

turn air filter)

utive normal run

then pause

 

Code 401

 

 

 

 

long run cycles.

 

 

cycles, or after

 

 

 

 

 

 

S Check ductwork or registers for blockage.

 

 

 

 

 

 

 

power reset.

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

circuit

 

 

 

 

 

 

 

 

S Check thermostat installation (location and lev-

 

 

 

 

 

 

 

 

el)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

High head pressure.

 

 

 

 

 

 

 

 

S Check high pressure switch if present in sys-

 

 

 

 

 

 

 

 

tem

 

 

 

 

 

 

Indicates the

 

S Check if system is overcharged with refrigerant

Clears after four

 

 

 

 

 

 

S Check for non−condensable in system

 

 

 

 

 

compressor

 

consecutive

 

 

 

 

 

2 Condenser coil poor air circulation (dirty, blocked,

2 flashes

 

Off

Critical Alert

System

protector is open

normal com-

then pause

 

Code 402

pressure trip

or missing supply

 

damaged).

pressor run

 

 

 

 

 

 

 

 

power to the

3 Condenser fan is not running.

cycles, or after

 

 

 

 

 

compressor.

 

S Check fan capacitor

power reset.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S Check fan wiring and connectors

 

 

 

 

 

 

 

 

S Check fan motor for failure or blockage

 

 

 

 

 

 

 

4

Return air duct has substantial leakage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Thermostat demand signal is intermittent.

Clears after four

 

 

 

Moderate

 

Compressor is

consecutive

 

 

 

 

2

 

3 flashes

 

 

 

Time delay relay or heat pump control is defective.

normal com-

 

Off

Alert Code

Short cycling

running less than

then pause

 

3

If high pressure switch is present, see flash code 2

pressor run

 

 

403

 

three minutes.

 

 

 

 

 

information.

cycles, or after

 

 

 

 

 

 

 

 

 

 

 

 

 

 

power reset.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 43

XP17 SERIES

Page 42 Page 44
Image 43
Page 42 Page 44
Contents General Table of ContentsHeat Pumps Base with Elongated Legs Unit Dimensions −− Inches mmSide View Access View Model Number IdentificationControl BOX Typical Unit Parts ArrangementOperating Service Valves Using Manifold Gauge SetShipping and Packing List Reinstall Stem Cap Operating Angle Type Service ValveOperating Ball Type Service Valve To Access Service Port2CONNECT Manifold Gauge SET Recovering Refrigerant from Existing System1DISCONNECT Power Recovering RefrigerantUnit Placement Placement, Slab Mounting and Stabilizing Unit Detail a Outside Unit PlacementStabilizing Unit on Uneven Surfaces Removing and Installing PanelsRoof Mounting Detail D Detail a Louvered Panel InstallationLouvered Panel Removal Detail CRefrigerant Line SET New or Replacement Line SetRefrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 2CAP and Core Removal 1PIPING Panel Removal and Preparing Line SET7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen Braze Line SETFlushing Line Set and Indoor Coil Flushing Line Set and Indoor CoilEqualizer Line Installation Installing Indoor Expansion ValveIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Leak Test Line Set and Indoor CoilS S S S Evacuating Line Set and Indoor Coil24VAC Transformer Size Circuit and Install Disconnect2INSTALL Thermostat ElectricalRoute Control Wires Ting 3A. Route Control Wires Ting4ROUTE High Voltage and Ground Wires Typical XP17 Wiring Heat Pump Control AGE Heat Pump Control A175 Jumpers and TerminalsHeat Pump Control A175 Jumper and Terminal Descriptions Flat metal jumper Field Control WiringFurnace Control System Refrigerant Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpAirflowindoor Coil Cooling Mode Indoor Airflow CheckHeating Mode Indoor Airflow Check Adding or Removing RefrigerantSubcooling Charging Method Using HFC−410A Weigh In MethodAir Handler / Coil Match ups and Targeted Subcooling Values Psig Operating and Temperature PressuresDefrost System System OperationsUnit Sensors Resistor Location Sensor Temperature / Resistance RangeYES Defrost Calibration Sequence of OperationsS S Test Pin E33 FunctionsOr below Low Pressure S87 Switch OperationHigh Pressure Switch S4 Sequence of Operation Input Fault or Miswire Degrees Resistance Fahrenheit 136.3 2680 DS15 and DS13 Ault Lockout LED Codes System Status, Fault and Lockout LED CodesDS11 and DS14 ATUS, Fault Lockout LED Codes Resetting Fault and Lockout LED CodesModerate Device Alert Status225ºF 107ºC Lockout Vice removed or Clears after FAN Motor Control A177 OPERATION, Field Configuration and TestingTroubleshooting FAN Motor B4 Test ProcedureFan Motor Control Flash and Pause Durations Fan Motor Control Error/Fault LED CodesFan Motor Control Stage LED Indicator Codes Fan Motor Control RPM, LED Code and DC Voltage OutputDemand Begins TOP Grille or FAN Motor Mount Adjustment for FAN ClearanceTOP Grille Adjustment FAN Motor Position AdjustmentFAN Motor Control A177 PULSE−WIDTH Modulation PWM Testing for External Power to Fan Motor Control Finish StripStart TerminalSnow Guard Top Cover MaintenanceHomeowner SunSource Home Energy System START−UP Checks XP17 Start−Up and Performance ChecklistCooling Mode Heating Mode
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