American Water Heater ITCE3-52/80/119, STCE3-52/80/119 Fault & Alert Messages, “Temp Probe Open”

Page 70
Fault & Alert Messages

TROUBLESHOOTING

Fault & Alert Messages

 

DISPLAYED MESSAGE

CHECK/REPAIR

 

CONDITION/INDICATES

 

 

 

 

 

 

“Temp Probe Open”

• Check the J5 plug/socket connections at the

 

(Fault Condition)

CCB ensure they are mating properly and pro-

 

 

viding good contact. Check the pins inside the

 

The control system has detected an open circuit in

J5 plug/socket for wear or damage. See CCB

 

the temperature sensor. The control system will

illustration and socket identification on pages 42

 

declare this fault condition if it senses a resistance

- 44. Replace damaged plug connectors/wiring

 

above 56,000 ohms from the temperature sensor.

harness as necessary.

 

Possible Causes:

• Check for pinched or broken wiring between the

 

Immersion Temperature Probe and the J5 plug/

 

Plug/socket connection problems

socket connection on the CCB - repair or

 

Wiring connection problems

replace damaged wiring as necessary. See

 

Defective Immersion Temperature Probe

CCB illustration and socket identification on

 

 

pages 42 - 44.

 

 

• Check the resistance of the temperature sensor

 

 

inside the Immersion Temperature Probe - see

 

 

pages 37 - 39. Replace the Immersion Temper-

 

 

ature Probe if measured resistance is above

 

 

56,000 ohms.

 

 

• Call the toll free technical support phone num-

 

 

ber on the back cover of this manual for further

 

 

assistance if the problem has not been cor-

 

 

rected after performing the procedures outlined

 

 

here.

 

 

 

 

“Temp Probe Short”

• Check for pinched or shorted wires between the

 

(Fault Condition)

J5 plug/socket connection on the CCB and the

 

 

Immersion Temperature Probe - repair or

 

The control system has detected a shorted circuit in

replace damaged wiring as necessary. See

 

the temperature sensor. The control system will

CCB illustration and socket identification on

 

declare this fault condition if it senses a resistance

pages 42 - 44.

 

below 390 ohms from the temperature sensor.

• Check the resistance of the temperature sensor

 

Possible Causes:

inside the Immersion Temperature Probe - see

 

pages 37 - 39. Replace the Immersion Temper-

 

Shorted wiring

ature Probe if measured resistance is below 390

 

Defective Immersion Temperature Probe

ohms.

 

 

• Call the toll free technical support phone num-

 

 

ber on the back cover of this manual for further

 

 

assistance if the problem has not been cor-

 

 

rected after performing the procedures outlined

 

 

here.

 

 

 

 

 

 

Servicing should only be performed by a Qualified Service Agent

68

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Contents MODELS STCE3-52/80/119 & ITCE3-52/80/119 Service HandbookCOMMERCIAL ELECTRIC WATER HEATERS Technical Support and PartsPage SERVICE MANUAL TABLE OF CONTENTSCOMMERCIAL ELECTRIC WATER HEATER IMPORTANT SERVICE REMINDER QUALIFICATIONS - QUALIFIED SERVICE AGENTSERVICE WARNING INTRODUCTIONINSTRUCTION MANUAL TOOLS REQUIREDCLOSED WATER SYSTEMS INSTALLATION CONSIDERATIONSTHERMAL EXPANSION ELECTRICAL REQUIREMENTS Power SupplyGrounding WIRING CONNECTIONS PRE SERVICE CHECKSSERVICE PRECAUTIONS SURFACE MOUNT CONTROL MODELS HEATING ELEMENT CONFIGURATIONSWATER HEATER CONSTRUCTION ELECTRONIC CONTROL MODELSSURFACE MOUNT CONTROL MODELS WATER HEATER CONSTRUCTIONELECTRONIC CONTROL MODELS Voltage OPERATION & SERVICEPRINCIPLES OF ELECTRICITY AmperageOhms Law Ohms Law applied to “SINGLE PHASE” 1Ø powerCalculating Amps/Ohms/Volts/Watts SINGLE AND THREE PHASE POWER L1 L2 L3Checking Single Phase 1Ø Power 2 L2 and L3 terminals of the water heater’s Power Distribution Block Checking Three Phase 3Ø Power1 L1 and L2 terminals of the water heater’s Power Distribution Block 3 L1 and L3 terminals of the water heater’s Power Distribution BlockSurface Mount Control Models Three Phase to Single Phase PHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELSSurface Mount Control Models Single Phase to Three Phase Electronic Control Models Three Phase to Single Phase PHASE CONVERSIONS - ELECTRONIC CONTROL MODELSElectronic Control Models Single Phase to Three Phase Ohm Meter Method FUSESVolt Meter Method SURFACE MOUNT THERMOSTATS Thermostat & ECO Test Heating Element Construction HEATING ELEMENTSWire conductor inside tube Heating Element Ratings Heating Element ConfigurationsNUMBER OF FACTORY INSTALLED TOTALAPPROXIMATE CURRENT - AMPS Heating Element AmperageELEMENT 208 VACHeating Element Amperage Test Heating Element Voltage Test Heating Element Resistance & Ground Tests Measuring ResistanceHeating Element Ground Test Replacing Heating ElementsElement Sensor ELEMENT SENSORSElement Sensor Construction Three Current Sensors Element Sensor FunctionsElement Sensor Operation CONTACTORS Contactor Construction - How They WorkElement Numbers/Connections Wire Colors to Elements Contactor ConfigurationsPower Connection Terminals ContactorsContactor Inspection Physically Operate MechanicalContactor Coil Voltage - At Contactor Contactor Coil Voltage - At CCB TRANSFORMERS 120 VAC Control Circuit Transformer WiringX1 120 VAC H1 H2 H3 H4 H5 N/A Primary Winding Secondary WindingPrimary Winding Voltage Test 120 VAC Control Circuit Transformer TestSecondary Winding Voltage Test 24 VAC Transformer Test IMMERSION TEMPERATURE PROBE ECO High Temperature Limit SwitchTemperature Sensor Checking Temperature Sensor Resistance Temperature Sensor Resistance TestTemperature Sensor Resistance Data WATER TEMPERATUREChecking ECO Switch Continuity Temperature Sensor DC Voltage TestECO Continuity Test DC Voltage To Temperature Sensor120 VAC From ECO ECO Voltage Test120 VAC To ECO Ground ConnectionELECTRONIC CONTROLS UIM User Interface Module CCB Central Control BoardCCB - CENTRAL CONTROL BOARD J3 Wiring Terminals - Alarm Output Relay see page CCB Socket & Wiring Terminal IdentificationJ2 Socket - 120 VAC Power Supply J4 Wiring Terminals - Contactor CoilsJ8 Socket - Not Used J9 Socket - Not Used J10 Socket - Not Used J7 Socket - Enable / Disable Circuits 1 & 2 see pages 45J16 Socket - Not Used J17 Wiring Terminals - Not Used J13 Socket - Heating Element Sensors BankCCB Enable/Disable Circuits Test Checking for 120 VAC Checking Power and Ground To The CCBChecking for Ground UIM Circuit Board Back Service Notes - Button Pad Ribbon CableUIM - USER INTERFACE MODULE UIM Circuit Board FrontCONTROL SYSTEM NAVIGATION CONTROL SYSTEM FEATURESELECTRONIC CONTROL SYSTEM UIM - User Interface ModuleTHE DESKTOP SCREEN Table 1 Status Icons ICONSTATE Table 2 - Operating StatesTable 3 - Control System Menus MENUS†Operating Set Point Differential SettingsTEMPERATURES MENU Tank TemperatureTemperature Settings Alarm Relay Output Enable / Disable 1Alarm Condition HEATER STATUS MENUDesktop Screen During Economy Mode Economy Mode Setup Menu ECONOMY MODE SETUP MENUSetpoint Adjustment Current TimeEconomy Mode Settings Setpoint Adjustment Value Economy Mode Settings Time Clock Settings Economy Mode All Day Economy Mode Settings Daily Operating Mode SettingsNormal Operation Between Alarm SP ALARM OUTPUT SETUP MENUTemp Alarm SP Used for external Alarm Output SettingsTemperature Units DISPLAY SETTINGS MENUDisplay Settings Backlight DelayTotal Heating Time HEATER INFORMATION MENUElapsed Time Bank # CyclesFAULT OCCURRENCE MENU CURRENT FAULT / ALERT MENUFAULT HISTORY MENU Main Menu - Current Fault Selected Fault History MenuRestore Factory Defaults RESTORE FACTORY DEFAULTS MENUFactory Default User Settings No Hot Water TROUBLESHOOTINGCOMMON SERVICE PROBLEMS Not Enough Hot WaterCONTROL SYSTEM UNRESPONSIVE Fault ConditionsResetting Control System Alert ConditionsControl System Unresponsive cont Heating Cycle DisabledUIM is Inoperable FAULT AND ALERT MESSAGES “No Current Detected”“Temp Probe Open” Fault & Alert Messages“Temp Probe Short” “Energy Cut Out ECO” Page Page Page Page Technical Support and Parts
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