A.O. Smith PHPT-80, 318257-000 installation instructions Diagnostic Codes, Display Shows Indicates

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DIAGNOSTIC CODES

DISPLAY SHOWS

 

INDICATES

 

CORRECTIVE ACTION

UPPER ELEMENT

1.

Upper element is not functioning

1.

Turn off power at the circuit breaker/fuse

CONNECT

 

 

 

box and check for a loose connection at the

FAULT

 

 

 

element. For access directions see “Heating

 

 

 

 

Element Replacement” section. If error persists

 

 

 

2.

proceed to the next step.

 

 

 

Replace non-functioning element. See “Heating

 

 

 

 

Element Replacement” section.

LOWER ELEMENT

1.

Lower element is not functioning

1.

Turn off power at the circuit breaker/fuse

CONNECT

 

 

 

box and check for a loose connection at the

FAULT

 

 

 

element. For access directions see “Heating

 

 

 

 

Element Replacement” section. If error persists

 

 

 

2.

proceed to the next step.

 

 

 

Replace non-functioningelement. See “Heating

 

 

 

 

Element Replacement” section.

 

 

 

 

IMPORTANT: Using an element greater

 

 

 

 

than 2000 watts in place of the lower element

 

 

 

 

will damage the water heater and void the

 

 

 

 

warranty.

HEAT PUMP

1.

Heat Pump compressor is not

1.

Contact a qualified person to service the heat

CONNECT

 

functioning.

 

pump.

FAULT

 

 

 

 

FAN

1.

Heat Pump fan is not functioning.

1.

Contact a qualified person to service the unit.

CONNECT

 

 

 

 

FAULT

 

 

 

 

AMBIENT TEMP

1.

Ambient Temperature Sensor is not

1.

Contact a qualified person to service the unit.

SENSOR SHORT OR OPEN

 

functioning.

 

 

OR AD ERROR

 

 

 

 

UPPER TEMP

1.

Upper Temperature Sensor is not

1.

Contact a qualified person to service the unit.

SENSOR SHORT OR OPEN

 

functioning.

 

 

OR AD ERROR

 

 

 

 

LOWER TEMP

1.

Lower Temperature Sensor is not

1.

Contact a qualified person to service the unit.

SENSOR SHORT OR OPEN

 

functioning.

 

 

OR AD ERROR

 

 

 

 

DISCHARGE TEMP

1.

Discharge Temperature Sensor is not

1.

Contact a qualified person to service the unit.

SENSOR SHORT OR OPEN

 

functioning.

 

 

OR AD ERROR

 

 

 

 

COIL TEMP

1.

Coil Temperature Sensor is not

1.

Contact a qualified person to service the unit.

SENSOR FAULT

 

functioning.

 

 

OR AD ERROR

 

 

 

 

MAIN CIRCUIT BOARD

1.

Main Circuit Board is not functioning.

1.

Contact a qualified person to service the unit.

FAULT

 

 

 

 

HIGH TEMP

1.

Water temperature in unit has

1.

See “Safety Shut-off” section.

LOCKOUT

 

exceeded 190° F.

 

 

CONDENSATE

1.

Condensate pump failure.

1.

Check to see if accessory condensate pump is

DRAIN

 

 

 

plugged in and has power. Also check circuit

ALARM

 

 

 

breaker/fuse box and GFCI (if used). if error

 

 

 

 

persists proceed to the next step.

(If Accessory Condensate

 

 

2.

Check condensate pump outlet tube for

Pump is Installed)

 

 

 

blockage. if error persists proceed to the next

 

 

 

3.

step.

 

 

 

Check control wire connections to condensate

 

 

 

4.

pump. If error persists proceed to the next step.

 

 

 

Replace accessory condensate pump. If error

 

 

 

 

persists contact a Qualified Person.

NOTE: The diagnostic codes listed above are the most common. If a diagnostic code not listed above is displayed, contact Residential Technical Assistance referencing the number on the front of this manual.

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Contents Installation Instructions Use & Care Guide Water Heater Safety Your safety and the safety of others are very importantInstalling Your Water Heater Consumer InformationConsumer Responsibilities Basic Operation FundamentalsLocation Requirements Site locationPiping Installation Water System PipingCondensate Drain Line Installation Closed System/Thermal ExpansionTemperature and Pressure Relief Valve Temperature & Pressure Relief ValveElectrical Requirements Press the power button to turn the water heater on Connecting the Condensate Pump Overflow Shut Off SwitchInsulation Blankets Installation Checklist Post Installation ReviewWater Heater Location Water System PipingWater Temperature Regulation Before UsingOperating Your Water Heater Adjusting the User Interface Module/Operational Modes Water Temperature AdjustmentOperating Mode Descriptions Other ControlsPowered Anode Operation Operational ConditionsWater Heater Sounds StackingHeating Element Replacement Maintenance of Your Water HeaterDraining and Flushing Cleaning the Heat Pump Routine Preventive MaintenanceAir Filter Cleaning/Replacement Replace the foam blocks and access coversDiagnostic Codes Display Shows IndicatesTroubleshooting Chart Problem Possible CausesRepair Part Illustration Page Copyright 2010 A.O. Smith Corporation. All rights reserved

318257-000, PHPT-80 specifications

The A.O. Smith PHPT-80,318257-000 is a highly efficient water heater designed to meet the needs of both residential and commercial applications. This unit features a capacity of 80 gallons, making it suitable for larger households and businesses requiring a significant supply of hot water. The PHPT-80 stands out for its innovative technologies, versatility, and durability.

One of the key features of the PHPT-80 is its high energy efficiency. This model utilizes advanced insulation technology that minimizes heat loss, making it an excellent choice for energy-conscious consumers. In addition, the heater is equipped with a powerful and efficient heating element that ensures rapid recovery times, allowing for a continuous supply of hot water even during peak usage periods.

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