Rheem P-M406 Operating Instructions - Page 33
Mode Button, Temp Buttons, Operation, Service Menu and Fault History, THERMOSTAT OPERATION -
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THERMOSTAT OPERATION - ADVANCED FLAME TECHNOLOGY (AFT) BOARD LCD Display Temp Buttons Mode Button The pool heater touchpad, located on the upper front panel of the heater, allows the user to select either POOL or SPA operation, and to adjust the setpoint temperature. The LCD display window indicates the mode (OFF, SPA, POOL) and the actual water temperature. A manual power switch provided below the touchpad turns the control power ON or OFF. Program button the pilot flame current using a bar graph and numerical display. A signal of less than 4 indicates a weak flame signal and may require service. Refer to Section 5 - Troubleshooting for possible causes and corrections. Mode Button The MODE button is used to select either POOL or SPA operation. It also allows the user to turn the heater off electronically, allowing the LCD display to remain energized and to continue showing the actual water temperature. FLAME STRENGTH INDICATOR Press the DOWN button. The Supply Voltage screen indicates the voltage supplied to the control board. Normal readings range from 24 to 29 volts. Temp Buttons If the heater is in POOL or SPA mode, the desired water temperature (SETPOINT) will also be displayed and may be adjusted using the UP or DOWN buttons. SUPPLY VOLTAGE INDICATOR Operation In the POOL or SPA modes, the actual water temperature is displayed along with the desired water temperature (SETPOINT). When the water temperature is above the setpoint, "Water Temp" will alternate with "No Demand." When the water temperature is below the setpoint and the heater is firing, "Water Temp" will alternate with "Heating." Press the DOWN button. The Run Time indicates the total hours of operation for the pool heater, as measured by the amount of time that the main gas valve has been powered. The Cycle count indicates the number of on/off cycles of the heater, as measured by the number of times the pilot valve has been powered. To adjust the setpoint temperature, make sure the control is in the appropriate mode (POOL or SPA) and push the UP or DOWN buttons. ALTERNATING DISPLAYS DURING HEATING Service Menu and Fault History To access the Service Menu and fault history, press the MODE and UP buttons simultaneously for 3 to 5 seconds. The heater will continue to operate normally while in the Service Menu. The first screen displayed is the Flame Strength indicator, which indicates RUN TIME INDICATOR Press the DOWN button. The Fault History can display up to ten faults in memory. The order of the faults begins with "Fault Last," which is the most recent fault, and proceeds through ten most recent messages in chronological order. The second line of the display shows the fault message. If there are no faults in the history buffer, the second line reads "All Faults Clear." FAULT HISTORY 33