Rheem P-M406 Operating Instructions - Page 43

SECTION 5 - TROUBLESHOOTING MECHANICAL IMPORTANT NOTICE These instructions are intended for the use of qualified personnel who are specifically trained and experienced in the installation of this type of heating equipment and related system components. Installation and service personnel may be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt repairs according to these instructions. PROBLEM CAUSE SOLUTION Harmonics, or whining noise U.G. inoperative *Debris or restriction in system Debris in gas line Low flow Check movement by putting in hot water (110°F or higher). If no movement, replace. Locate the restriction and remove. Flush system and clean. Remove debris or blow out gas line. Scale forming in heat exchanger - clean heat exchanger and check pool pH and total alkalinity. Heater going on and off continuously Dirty filter Low water level in pool External bypass setting out of adjustment Pressure switch out of adjustment..... Clean or replace filter. Raise water level. Adjust bypass. Adjust pressure switch. Liming or scale forming in exchanger Pool water Bypassing too much water U.G. not functioning See Water Chemistry on page 2. Inspect bypass for movement, if no movement, replace. Replace if no movement when heated. Sooting High flow rates U.G. Inoperative *Air starvation Improper venting Insects or debris clogging burner intake ports Reduce by adding manual bypass valve. Adjust manual bypass valve until heater outlet water temperature is between 105°F and 110°F. Check movement by putting in hot water (110°F or higher). If no movement, replace. Refer to installation instructions. Follow recommended installation instructions. Clean burners. Pilot outage or "Weak Flame" signal Low gas pressure Restricted/dirty pilot Weak pilot generator Adjust gas pressure. Clean pilot and/or electrode. Replace pilot. Yellow lazy flame Low gas pressure Insects or debris clogging burner intake ports Adjust gas pressure. Clean burners. Outer jacket very hot (paint blistered) *Broken refractory caused by shipping damage or improper combustion Excessive sooting of heat exchanger.. Replace refractory panels. Determine cause of sooting & correct. Takes too long to heat pool or spa Under-sized heater Filter not running long enough Dirty filter Gas line or meter undersized Calculate heating capacity of heater: Htr. output(BTUH) Pool gallonage x 8.33 or refer to heater sizing chart. This does not take into account heat loss due to weather. Reset time clock. Clean filter. Refer to installation instructions. Leaking at well Overacid Replace well and maintain proper water chemistry. Leaking at heat exchanger Overacid Replace heat exchanger and maintain proper water chemistry. Gasket brittle and leaking (overheated) Heater running after pump shuts off.... Refractory damage Sooted heater See Pressure Switch Adjustment. Replace refractory. Determine cause of sooting and correct. Combustion fan not running "Fan 5 min Delay" signal or "Fan Lockout" signal Fan relay Fan Burned motor Air pressure switch Replace fan relay. Loose connection or failed motor. Incorrect wiring, replace blower. Replace air switch. * Indicates symptom which usually occurs on initial start-up. 43