Assessments - 2, GPA: 4.5 ( )

Fabricante : A.O. Smith Arquivo Tamanho: 550.11 kb Arquivo Nome : Língua de Ensino:

Under normal operating conditions, the appropriate LED’s will sequence with steady illumination according to the particular appliance operating state. In cases where problems or a lockout occurs, the appropriate LED’s will illuminate indicating the general area where the problem exists. A description of the LED’s and their corresponding functions are as follows. LED Controller Function Call for Heat Flow Switch Monitors Outlet water temperature minus Switching Differential and thermostat circuit or tank probe circuit. LED is ON when the temperature at Outlet Water Probe is less than the set-point minus the switching differential, and the thermostat circuit or tank probe circuit is closed. Monitors the condition of the flow switch. LED Pressure Switch is ON when the flow switch closes, indicating water flow through the system. Monitors the condition of the pressure switch(s). LED is ON when the pressure switch(s) are in their correct state. Ignitor Current Monitors current flow through the ignitor element. LED is ON when current flow through the ignitor is sensed. Gas Valve Flame Sense Monitors Gas Valve output. LED is ON when the output relays supplying power to the gas valve(s) is closed. Monitors the Flame Sense Rod. LED is ON when a signal from the flame rod is sufficient to indicate flame. Blocked Inlet Blocked Flue Blower Fail Indicates a blockage or interference at the appliance air inlet. Indicates a blockage or interference at the appliance flue. Indicates an error/malfunction in the blower motor circuit. Circulate Fail Ignition Fail Indicates an error/malfunction in the circulating pump circuit. Indicates a malfunction in the ignition system circuit. 7 Troubleshooting The WHC1502 Series Control System has many inherent diagnostic and fault detection routines built into its operating hardware and software. These routines, in conjunction with the four (4) digit LED display and eleven (11) LED status indicators on the Display Board, can greatly assist any service person in quickly pinpointing the source of a problem which may occur within the appliance. Under certain circumstances, multiple LED’s will illuminate to better pinpoint the target area(s). The following list defines the error code messages that scroll across the LED display: ERROR MESSAGE REPORTED ERROR OPEn InLEt ProbE No probe detected at connector CN1 on Control Board. OPEn OutLEt ProbE No probe detected at connector CN2 on Control Board. Circulation FAIL No flow detected at flow switch. Inducor FAIL No pressure detected at pressure switch. FLAmE SenSE FAIL Flame sense detected before gas valve is turned on. SenSor FAIL One of the sensors, Flow, Pressure, Hi Gas, or Lo Gas was not in the correct state. Ignitor FAIL No Ignitor current sensed. No Ignition Flame not detected after 1 or 3 tries. ECO FAIL ECO/High Limit switch opened. Control FAIL Relay did not open or close properly. BLOCKED VENT SHUT-OFF SYSTEM The Boiler is equipped with a blocked vent shut-off system which will...

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