Rheem P-M406 Operating Instructions - Page 35

NOTE: The LCD temperature display may not agree with the temperature reading of your pool or spa thermometer. The heater reads the water temperature at the inlet. Due to the circulation characteristics of any pool or spa, the water temperature at the inlet to the heater may differ from that observed at a given location in the pool or spa. STATUS AND DIAGNOSTICS The digital thermostat models are programmed to display a variety of status and diagnostic messages, depending on the operating conditions. The following heat status messages are displayed in The following conditions are displayed only while there Pool, Spa, and Remote modes when there are no is a demand for heat present. active fault conditions. Display Heating Condition Call for heat established, flame present Spark Spark operating No Demand Heat demand is satisfied The following conditions are displayed in Pool, Spa and Remote modes. Display Condition Sensor Failure Thermistor temperatures disagree by more than 2°F Sensor Open Thermistor sensor failed open. (Below -20°F) Sensor Short Thermistor sensor failed short. (Above 217°F) Flame w/o CFH Board is sensing flame when both main and pilot valves are commanded shut. PV Output Fault Pilot gas valve output is not in commanded state. MV Output Main gas valve output is not in com- Fault manded state. LoNox Tab Fault Voltage is sensed at the Lo NOx terminal on a non-Lo NOx heater (Lo NOx tab is intact). Internal Fault Board fault, replace board. EEPROM Fault Clock/ Fireman Sw Low Temp Lockout Memory fault, reset set points, replace board if fault does not clear. Time clock/fireman switch circuit is open. Water temperature below 36°F. Display Water Sw Open Condition Water pressure switch open. Vent/Field Sw #1 Vent spill switch/field switch #1 open. Hi Limit 1 Fault High limit 1 open. Hi Limit 2 Fault High limit 2 open. Rollout Sw Open Rollout switch open. Flow/Field SW #2 Field-supplied flow switch/field switch #2 open. 3 fan switch faults within same heat Fan Lockout demand cycle, power must be cycled to clear the fault. Fan 5 Min Delay Heater shut down for 5 minutes because LoNox fan switch didn't close. Ignition Lockout (Propane Tab Broken) Alternating with "No pilot sensed" - Pilot flame not established within the required time (15 sec or 90 sec). Alternating with "Main Ign Failure" - Pilot flame lost during the 8 second trial to ignite the main burner. Ignition Failure (Propane Tab Not Broken) Alternating with "No pilot sensed" - Pilot flame not established within 90 seconds. Ign 6min Delay (Propane Tab Not Broken) Alternating with "Main Ign Failure" - Pilot flame lost 4 times within the 8 second trial to ignite the main burner. Heater will lockout for 6 minutes before retrying. 35