Rheem Raypak AVIA 264 - Troubleshooting Heater Issues

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10. TROUBLESHOOTING
Problem Possible Cause Corrective Action
LCD text ickering or no text Low or no voltage to control board .................. Check for 24VAC at control board P6.
Check transformer wiring to 240V or 120V.
Harmonics, or whining noise Unitherm governor inoperative ......................... Check movement by putting in hot water (above120°F [49°C] or
higher)
*Debris or restriction in system ........................ Locate the restriction and remove. Flush system and clean
*Debris in gas line............................................ Remove debris or blow out gas line
Low ow........................................................... Scale forming in heat exchanger - clean heat exchanger and check
pool pH and total alkalinity
Heater going on and o󰀨 continuously Dirty lter ......................................................... Clean or replace lter
Low water level in pool .................................... Raise water level
External bypass setting out of adjustment ....... Adjust bypass
Pressure switch out of adjustment................... Adjust pressure switch
Liming or scale forming in
exchanger
Pool water........................................................ See Water Chemistry on page 5
Bypassing too much water .............................. Inspect bypass for movement, if no movement, replace
Unitherm governor not functioning .................. Replace if no movement when heated
Sooting High ow rates ................................................. Reduce by adding manual bypass valve
Adjust manual bypass valve until heater outlet water temp is between
105°F and 120°F (40°C and 49°C)
Unitherm governor inoperative ........................ Check movement by putting in hot water (above 120°F [49°C] or
higher). If no movement, replace
*Air starvation .................................................. Refer to installation instructions
*Improper venting ............................................ Follow recommended installation instructions
*Insects or debris clogging burner intake ports Clean burners
Flame outage or Flame strength
below 2 μA
Low gas pressure ............................................ Adjust gas pressure
Restricted/dirty igniter ...................................... Clean igniter and burners
Takes too long to heat pool or spa Under-sized heater .......................................... 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
Filter not running long enough ......................... Reset time clock
Dirty lter ......................................................... Clean lter
Gas line or meter undersized .......................... Refer to installation instructions. See page 18.
Leaking at heat exchanger Overacid .......................................................... Replace heat exchanger and maintain proper water chemistry
Gasket brittle and leaking -
(overheated)
Heater running after pump shuts o󰀨 ................ See Pressure Switch Adjustment, See page 38.
Refractory damage .......................................... Replace refractory
Sooted heater .................................................. Determine cause of sooting and correct
Fan not running, "Di󰀨 Sw Open" or
"Fan Lockout"
Incorrect blower jumper ................................... Check blower jumper matches 240V or 120V power supply.
Fan relay.......................................................... Check control board Fan relay terminals “Power” and “Blower”.
If relay is stuck open or close, replace control board.
Fan Connection ............................................... Loose connection or failed motor. Prolonged exposure to power with
the wrong blower jumper can damage the blower.
* Indicates symptom which usually occurs on initial start-up.
IMPORTANT NOTICE: These instructions are intended for the use of qualied personnel who are specically 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 qualied shall not attempt to install this
equipment nor attempt repairs according to these instructions.
= approx. degF rise/hr