State Industries 650A Manuel D’Utilisation

30

2.  Check the fuses.

 

• 

The electrical disconnect switch usually contains fuses.

3.  The capacity of the heater may have been exceeded by a 

large demand for hot water.

4.  Colder  incoming  water  temperature  will  lengthen  the  time 

required to heat water to the desired temperature.

 

• 

If  the  heater  was  installed  when  incoming  water 

  

temperature was warm, colder water creates the effect  

 

of less hot water.

5.  Look for hot water wastage and leaking or open hot water 

faucets.

6.  Sediment  or  lime  scale  may  be  affecting  water  heater 

operation.  Refer to MAINTENANCE for details.

7.  Heater or burner may be dirty.

 

• 

Clean all heater flue pipes and flue connector, see    

 

MAINTENANCE.

 

• 

Have burner properly cleaned and readjusted.

8.  Burner may not be firing at proper rate.

 

• 

Check gas pressure

9.  Burner fan wheel may be dirty.

 

• 

Clean fan wheel with a soft brush.

10. Reset button on high limit control (Figure 1) has operated.  

Press reset button.

1.  Refer to WATER TEMPERATURE CONTROL.

1.  Sediment  or  lime  scale  accumulation  cause  rumbling  and 

pounding noises when the heater is operating.

 

•  The sounds are normal, however, the tank bottom should 

be cleaned.  Refer to MAINTENANCE for details.

2.  Some of the electrical components of the water heater make 

sounds which are normal.

 

•  Contacts click or snap as the heater starts and stops.  

 

•  Transformers often hum.

1.  Check to see if the water heater drain valve is tightly closed.  

Also check the cleanout opening for leakage.

2.  The apparent leakage may be condensation that forms on cool 

surfaces of the heater and piping.

3.  If the outlet of the relief valve is leaking it may represent:

 

•  Excessive water pressure

 

•  Excessive water temperature

 

•  Faulty relief valve

Excessive  water  pressure  is  the  most  common  cause  of  relief 

valve leakage.  It is often caused by a “closed system”.  If a check 

valve, back flow preventer, or pressure-reducing valve is in the 

inlet system it will not permit the expanded hot water volume to 

equalize pressure with the main.  The relief valve must release this 

water or the water heater or plumbing system will be damaged.  

Refer to MAINTENANCE – RELIEF VALVES.

When such a condition is encountered, local codes or inspection 

agency  should  be  consulted  to  determine  which  system  is 

acceptable in your area.  These may consist of:

•  Installation of a second relief valve with lower setting than the 

primary relief valve.

•  An expansion tank of suitable size and pressure rating and 

provision to avoid water logging.

On occasion, hot water may develop a strong odor. If this occurs, 

drain  the  heater  completely,  flush  thoroughly,  and  refill.    If  the 

problem persists, chlorinating of the heater and replacement of 

the factory installed magnesium anodes with aluminum anodes 

may correct the condition.

Occasionally water softener companies recommend removal of 

heater anodes for odor reasons.

  

  

 

NOTE:  ANY BYPASS OR ALTERATION OF THE UNITS SAFETIES 

WILL RESULT IN VOIDING THE APPLIANCE WARRANTY.

Before performing any troubleshooting familiarize yourself with 

the particular appliance.  State power burners are supplied with 

Honeywell

®

 ignition control systems and Robertshaw

®

 gas control 

valves, see Figures 10 and 11.

Refer to the SEQUENCE OF OPERATION  and burner exploded 

view,  see  Figure  12  and  the  wiring  diagram  located  on  page 

®Honeywell is a registered trademark of Honeywell International Inc.