A.O. Smith HYB-90N warranty Fault, Lockout, Code, Description, Cause, Remedy, type, Displayed

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Fault

 

 

 

Lockout

 

 

Code

Description

Cause

 

 

Remedy

 

type

 

Displayed

 

 

 

 

 

 

 

 

 

 

 

E30

Blower Error.

Locked Rotor.

 

 

1.

Check the blower wire harness.

 

 

 

 

Soft

2.

Change the blower.

 

 

 

 

 

3. Change the board.

E33

Water Flow Valve

The water valve did not

 

 

1. Check the water valve wire harness.

 

Closed.

open when attempting to

 

Soft

2. Change the board.

 

 

establish flow.

 

 

3.

Change the water valve.

E34

Proportional Valve

The closed loop control

 

 

Check the proportional gas valve wire

 

(PV) Response

of the proportional valve

 

 

harness, change the board, change

 

Too Slow.

is not functioning properly

 

Soft

the gas valve assembly

 

 

(control error) or the valve

 

 

 

 

 

 

 

 

 

 

 

is responding slowly (valve

 

 

 

 

 

 

failure).

 

 

 

 

E35

Repeated Flame

Low Gas Inlet Pressure.

 

 

Check the flame rod wire harness,

 

Loss Fault.

 

 

 

check line gas pressure. If it is above

 

 

 

 

Soft

5” WC check the flame rod and if it

 

 

 

 

looks dirty, clean it up using isopropyl

 

 

 

 

 

 

 

 

 

 

alcohol and a clean cloth, change the

 

 

 

 

 

flame rod, change the board

E36

Calibration error.

Calibration sequence

 

 

1.

Unplug the power cord, check the

 

 

incomplete because end

 

 

 

DIP switch 4 position and put it in

 

 

of “call-for-heat” during

 

 

 

ON position.

 

 

the calibration time, or

 

 

2.

Increase the set point so that a

 

 

calibration sequence not

 

 

 

“call-for-heat” occurs.

 

 

initiated because of lack of

 

Soft

3.

Drain the tank in order to lower the

 

 

“call-for-heat”, or the unit

 

 

 

water temperature so that a “call-

 

 

has been never calibrated

 

 

 

for-heat” is generated.

 

 

or Calibration is successful

 

 

4.

Set DIP switch 4 to OFF position.

 

 

but DIP switch 4 not set to

 

 

5.

Recalibrate the unit.

 

 

“normal”.

 

 

6.

Change the board.

E37

No Water Flow.

The heater could not start

 

 

1.

Check the water inlet on the heat

 

 

because the water flow was

 

 

 

engine.

 

 

not established. This can be

 

 

2.

Make a water draw during first 60

 

 

caused by an air bubble or a

 

 

 

seconds after putting the unit in ON

 

 

blockage in the heat engine

 

 

 

mode (to evacuate possible air from

 

 

water passage, a failed flow

 

 

 

the heat engine water passage).

 

 

sensor or a failed circulation

 

 

3.

Check wire harness for pump, water

 

 

pump.

 

Soft

 

valve and water flow sensor.

 

 

 

 

 

4. Check the pump 120Vac voltage

 

 

 

 

 

 

supply (the pump shall be energized

 

 

 

 

 

 

during the heating mode).

 

 

 

 

 

5.

Clean or change the water filter.

 

 

 

 

 

6. Change board.

 

 

 

 

 

7. Change pump.

 

 

 

 

 

8. Change water valve.

E99

Board Failure.

An internal diagnostic check

 

Soft

Change the board.

 

 

on the board has failed.

 

 

 

 

 

 

 

 

 

TABLE 5

 

 

 

Lockout types:

 

 

 

 

 

Continuous. Needs “Cycle the Power” or service to restart.

 

 

 

Soft. Will try to automatically recover and restart after 20 minutes.

 

 

 

Auto. Will automatically restart when voltage returns to acceptable parameters.

 

Alert. Will only display an error code in diagnostic mode.

 

 

 

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Contents Installation and Operating Manual For Your SafetyPOWER VENT GAS MODELS HYBRID GAS WATER HEATERSTABLE OF CONTENTS IMPORTANT INFORMATIONSAFE INSTALLATION, USE AND SERVICE IMPORTANT DEFINITIONSGENERAL SAFETY DANGER INTRODUCTION Page REPLACEMENT PARTS AND DELIMING PRODUCTS GET TO KNOW YOUR WATER HEATER - GAS MODELSINSTALLATION CONSIDERATIONS ROUGH IN DIMENSIONSINSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS WATER PIPING - MIXING VALVE USAGE Water Potable Heating All models are consideredFACTS TO CONSIDER ABOUT LOCATION HANDLE INSTALLATION EARTHQUAKE ZONES Access ToScrews Top Casing FrontAPPLIANCES IN CONFINED SPACES COMBUSTION AIR AND VENTILATIONAPPLIANCES IN UNCONFINED SPACES B. ALL AIR FROM OUTDOORS See Figures 12, 13 and CLOSED WATER SYSTEMS CHEMICAL VAPOR CORROSIONWATER PIPING THERMAL EXPANSIONHARD WATER TEMPERATURE-PRESSURE RELIEF VALVET&P Valve and Pipe Insulation if supplied GAS PIPING SEDIMENT TRAPSFLOODING/FREEZING HIGH ALTITUDE INSTALLATIONSGAS LINE PURGING FILLING THE WATER HEATERPLANNING THE VENT SYSTEM If using 2 inch vent pipeVENT PIPE TERMINATION TERMINATION ELBOW If using 3 inch vent pipeRODENT SCREEN INSTALL INTO ELBOW GROUND LEVEL OR MAXIMUM SNOW LINE ELBOW STRAPCONDENSATE INSTALLATION OF VENT SYSTEMVENT TERMINAL INSTALLATION, SIDEWALL CONDENSATION WARNINGVent terminals supplied with heater must be used SEQUENCE OF INSTALLATIONSINSTALLATION SEQUENCE INSTALLATION OF VENT SYSTEM, SIDEWALL INSTALLATION OF VERTICAL VENT SYSTEMVENT PIPE PREPARATION STEP B RECOMMENDED BRUSH* SIZE FOR PRIMER AND CEMENT APPLICATIONSSTEP A STEP F U.S. POWER VENTSTEP E STEP G CONNECTION TO VENT PIPEVENT HOODS MAY BE EXTREMELY HOT DURING OPERATION FIGURE 33a ELECTRICAL CONNECTIONSCALIBRATION “OFF”, “up”OPERATING INSTRUCTIONS DISPLAY PANELNumeric Display CONTROLS. WIRING ERRORS CAN CAUTION LABEL ALL WIRES PRIOR TODISCONNECTION WHEN SERVICING CAUSE IMPROPER AND DANGEROUSOPERATING INSTRUCTIONS LIGHTING INSTRUCTIONSFOR YOUR SAFETY READ BEFORE LIGHTING TO TURN OFF GAS TO APPLIANCEDESCRIPTION HEAT CYCLE DEFINITIONSSTATE TEMPERATURE REGULATION UNIQUE HYBRID FEATURES Temperature ProbesWater Circulation Pump Line Voltage Monitor START UP CONDITIONS CONSTANT OUTPUT TEMPERATURE CONTROLDetection of Failure to Maintain Desired Constant Temperature OPERATIONAL CONDITIONSVENTING SYSTEM INSPECTION MAINTENANCEHOUSEKEEPING BURNER OPERATION AND INSPECTIONTEMPERATURE-PRESSURE RELIEF VALVE OPERATION ANODE ROD REPLACEMENTCLEANING THE INLET WATER FILTER MOTORSCLEANING THE HEAT ENGINE FLUSHING THE HEAT EXCHANGER LIME BUILD- UPFAULT INDICATION AND ERROR CODES DRAINING THE TANKCode and DIAGNOSTIC DISPLAYDiagnostic DisplayedCause FaultLockout RemedyCode FaultLockout DescriptionCode TROUBLESHOOTING b.The unit display is an error code WHEN THE TAP IS OPENEDCheck if there is any error code on system installed, or there is aSERVICE LEAKAGE CHECKPOINTSA Baffle, Flue B Hot Water Outlet Nipple w/ Anode, Heat Trap PARTS IDENTIFICATIONITEM # AB C DEF G T SH R I Q P REPLACEMENT PARTS DESCRIPTION KIT #CLAIM PROCEDURE LIMITED RESIDENTIAL GAS WARRANTYSERVICE AND LABOR RESPONSIBILITY CONDITIONS AND EXCEPTIONSPage Page 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX