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AdvantagePlus Fault Tree Troubleshooting 
 

1706.doc 

14

 

CONTROL HEALTH and GAS VALVE; failed to establish main burner after 3 successive attempts 

 
 

Explanation: The unit will make three attempts for main 
burner, then locks out. This is probably associated with 
a fuel supply problem. 
 
At a minimum, check the following: 
 

1.

 

Gas valve ON 

2.

 

Gas valve connector Molex is firmly seated. 

3.

 

Wires to this Molex are firmly seated into the 
connection itself. 

4.

 

Recycle power by pushing the red button. 

Summary of Contents for RUUD AdvantagePlus

Page 1: ...AC line voltage The LED is ON when 120VAC line voltage is present on the control board If the wall plug is properly wired you will see a green LED light on the bottom left hand corner of the control...

Page 2: ...e power Is the green LED on the bottom left side of the control board lit up Yes No Replace control board Remove and check wall plug Ensure the black lead is to the brass screw the white lead is to th...

Page 3: ...power to the water heater If the blower does not come on go to step 1 if the blower is does come on go to step 2 Unit appears to be fine Recycle power and try again Is there 24 VAC from the transforme...

Page 4: ...ton on the display Yes No Unit appears to be fine Recycle power ECO will trip at 2000 F and automatically reset when the water cools to 1600 F Measure the water temperature from the T P valve If the w...

Page 5: ...If you has continuity then follow yes 1 Disconnect the Molex and jumper the two green wires 2 Recycle power 3 If the unit goes to main burner then replace low water cut off switch 4 If the unit does n...

Page 6: ...ct both side of the venting and recycle power If the unit goes to main burner the problem is in the venting If the unit does not go to main burner the venting is probably OK Replace pressure switch 1...

Page 7: ...turn on and off This signal is generated by the control board Press the red reset button on the LED panel When the blower LED comes on then Measure for 2 0 and 8 8 DC volts on the orange and blue wir...

Page 8: ...3 feet of either a This will cause the combustion gases to re circulate back in to the fresh air intake 11 Is the termination behind bushes or shrubs a This will cause the combustion gases to re circu...

Page 9: ...om the AdvantagePlus Continue to next step Is the gas valve operating properly Yes No Replace control board 1 Recycle power to the heater When the GAS VALVE LED is ON measure 24 VAC between the yellow...

Page 10: ...g devices and do not respond well 6 Verify the gas orifice is installed and it is the correct orifice for the gas in use 7 Is there a fabricated drip leg to keep debris out of the gas valve Adjust the...

Page 11: ...check the following 1 Molex connections are tight on the board 2 Molex connects are tight on the blower Continue to next step Unit appears to be fine Recycle power and try again Does the igniter circ...

Page 12: ...0 VAC Yes No Replace control board The main control board passes the 120VAC from the power source there is not a direct link to line voltage except through the main control board 1 Measure for 120 VAC...

Page 13: ...d needs replacement CONTROL HEALTH problem with the control self diagnosis If the unit is operating but not holding temperature verify the flow rate of water is within the GPM performance for the temp...

Page 14: ...pts Explanation The unit will make three attempts for main burner then locks out This is probably associated with a fuel supply problem At a minimum check the following 1 Gas valve ON 2 Gas valve conn...

Page 15: ...AdvantagePlus Fault Tree Troubleshooting 1706 doc 15...

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