Troubleshooting - Rheem Raypak AVIA 264 Installation And Operation Manual

10. TROUBLESHOOTING

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
LCD text flickering or no text
Harmonics, or whining noise
Heater going on and off continuously
Liming or scale forming in
exchanger
Sooting
Flame outage or Flame strength
below 2 μA
Takes too long to heat pool or spa
Leaking at heat exchanger
Gasket brittle and leaking -
(overheated)
Fan not running, "Diff Sw Open" or
"Fan Lockout"
* Indicates symptom which usually occurs on initial start-up.
48
Possible Cause
Low or no voltage to control board ..................
Unitherm governor inoperative .........................
*Debris or restriction in system ........................
*Debris in gas line............................................
Low flow...........................................................
Dirty filter .........................................................
Low water level in pool ....................................
External bypass setting out of adjustment .......
Pressure switch out of adjustment...................
Pool water........................................................
Bypassing too much water ..............................
Unitherm governor not functioning ..................
High flow rates .................................................
Unitherm governor inoperative ........................
*Air starvation ..................................................
*Improper venting ............................................
*Insects or debris clogging burner intake ports
Low gas pressure ............................................
Restricted/dirty igniter ......................................
Under-sized heater ..........................................
Filter not running long enough .........................
Dirty filter .........................................................
Gas line or meter undersized ..........................
Overacid ..........................................................
Heater running after pump shuts off ................
Refractory damage ..........................................
Sooted heater ..................................................
Incorrect blower jumper ...................................
Fan relay..........................................................
Fan Connection ...............................................
Corrective Action
Check for 24VAC at control board P6.
Check transformer wiring to 240V or 120V.
Check movement by putting in hot water (above120°F [49°C] or
higher)
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
Clean or replace filter
Raise water level
Adjust bypass
Adjust pressure switch
See Water Chemistry on page 5
Inspect bypass for movement, if no movement, replace
Replace if no movement when heated
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)
Check movement by putting in hot water (above 120°F [49°C] or
higher). If no movement, replace
Refer to installation instructions
Follow recommended installation instructions
Clean burners
Adjust gas pressure
Clean igniter and burners
Calculate heating capacity of heater
Htr. output (BTUH)
= approx. degF rise/hr
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. See page 18.
Replace heat exchanger and maintain proper water chemistry
See Pressure Switch Adjustment, See page 38.
Replace refractory
Determine cause of sooting and correct
Check blower jumper matches 240V or 120V power supply.
Check control board Fan relay terminals "Power" and "Blower".
If relay is stuck open or close, replace control board.
Loose connection or failed motor. Prolonged exposure to power with
the wrong blower jumper can damage the blower.