35
SECTION 7. TROUBLESHOOTING
Troubleshooting Chart:
PROBLEM POSSIBLE CAUSES REMEDY
HEATER WILL NOT FIRE UP
See Troubleshooting Procedure That
Pertains To Your Heater, (Millivolt or
Electronic Ignition).
HEATER CYCLING ON AND OFF CON-
TINUOUSLY.
Time Clock Set Wrong. Reset Clock.
Filter Is Dirty. Clean Filter.
External By-Pass Out Of Adjustment, (Where
Used).
Adjust By-Pass.
Pressure Switch Out Of Adjustment. Adjust Pressure Switch.
SOOTING OF THE HEAT
EXCHANGER.
High Water Flow Rates (Above 125 GPM). Reduce Flow Rate By Adding A Manual
By-Pass Valve.
Internal By-Pass Stuck Open. Check For Excessive Hardness Or
Acidity That May Have Damaged Valve.
Repair Or Replace.
Lack Of Air For Combustion. Provide Adequate Air. See Venting
Installation.
Low Fuel Volume. Correct With Proper Gas Line Sizing.
Improper Venting. Provide By Proper Venting. See Section
II.
Burner Inlet Throat Blocked. High Pressure/Low
Pressure.
Clean Burners Adjust Gas Pressure.
Collapsed Combustion Chamber. Replace Combustion Chamber.
PILOT OUTAGE (MILLIVOLT ONLY)
Low Gas Pressure. Increase Pressure.
Restricted Gas Flow. Clean Pilot Orice Or Tubing.
Weak Thermopile. Replace Thermopile.
JACKET SURFACE
TEMPERATURES EXCESSIVE.
Broken Refactory. Replace Refactory.
LIME SCALE.
By-Pass Valve Stuck Open. Inspect By-Pass Movement And Repair.
Thermal Control Valve Not Working. Check For Movement. Replace If Not
Movement.
Water Chemistry Out Of Balance. See Section On Pool Water Chemistry.
Unnecessary External Manual By-Pass Installed
Or Out Of Adjustment.
Close Manual By-Pass Valve And Re-
move Or Adjust Properly. See Section
on By-Pass Valve.
HEATER WILL NOT BRING POOL
TO DESIRED TEMPERATURE.
Gas Line Too Small. Check Gas Pipe Size in Figure 20.
Heater Too Small. Check Sizing Chart. Install Larger
Heater If Necessary.
Time Clock Is Set Incorrectly. Reset Time Clock.
Filter Not Cleaned Often Enough. Clean Filter More Frequently.
Thermostat Out Of Adjustment Or Defective. Test Thermostat. Replace If Necessary.
Pressure Switch Inoperative. Test Pressure Switch. Replace If Neces-
sary.
LEAKING HEAT EXCHANGER.
Overly Acid Water Or Freeze-Up. Replace Heat Exchanger And Maintain
Water Chemistry Properly.
LEAKING AT WELL. Overly Acid Water Or Freeze-Up. Replace Well. Maintain Water Chemistry.
LEAKING AT UNION NUT
CONNECTIONS. OVERHEATED
O-RINGS (BRITTLE).
Heater Continues To Run After Pump Shuts Off. See Pressure Switch Adjustment. Re-
place leaking O-Rings.
Refactory Damage. Replace Refactory.
This chart may be used as a quick reference guide for maintenance and service problems.
FOR QUALIFIED SERVICE PERSONNEL ONLY.
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