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TROUBLE SHOOTING AND REPAIR OF ES3030G

 

THIS SHOULD ONLY BE DONE BY A QUALIFIED ELECTRICIAN!!!

 

 

The following is a list of common problems that occur at the installation and field operation.

Reference parts and wiring diagram.

 

I.      POWER CONTACTORS WILL NOT OPERATE FOR GENERATOR

 

A.    Are the power leads hooked up to the two solid white and two solid black leads? If the         

      power leads are hooked up, measure the voltage between the solid white and black

                  leads. It should read between 110 to 130 VAC. It takes approximately 30 to 40

      seconds for the time delay relay to energize.

 

B.    Check the red jumper leads. See wiring diagram. Make sure all wires are securely

      fastened. This should be done with the power off.

 

C.    To check relay coils, be sure all power sources are off. Remove red jumper wire from S1. With continuity or ohm meter, check between screw S1 & S2, you should have

      continuity or ohm resistance. If not, you have burned out coil and relay needs to be   

      replaced. Repeat the same test for screws S3 & S4. If coils check ok, go to next

      procedure.

 

D.    To check time delay relay, be sure all power sources are off. With continuity or ohm

meter check between screws S5 & S6. You should read continuity or ohm resistance. If not it means time delay relay needs to be replaced.

 

II.   NO SHORE POWER

 

A.    Are the shore power leads securely fastened to the two white w/orange stripe and two

     black w/orange stripe leads? With a load turned on, measure the voltage between the

      wires white w/orange stripe and black w/orange stripe leads (S17, S18 & S10, S9).                          

      This should measure between 110 to 130 VAC. If no voltage, check power supply. If    

      power is ok, check power between two white w/yellow stripe and two black w/yellow        

      stripe. This should read between 110V to 130V. If no voltage go to step B.

 

B.    With power off, check relay contacts and be sure they are in their normal closed     

     condition and not stuck in the open position. Also check to see if the contacts are not

      pitted. If any of the above is correct, replace relay(s). If the relays check good, go to

      C.

 

C.    Check the connections to the power panel. These are the two white w/yellow stripe             

     and two black w/yellow stripe leads (S14, S15 & S13, S12). You should get a volt 

      reading of 110 to 130 VAC. If no voltage, repeat step B and check wiring to the shore

      cord.

 

III. RELAYS HUM OR CHATTER WHEN IN OPERATION

 

A.    This may be caused by dust or moisture in the relays. Make sure all power sources are

     off. Using an air hose with a light rag over the end of the hose to prevent moisture

      from being blown into the relays, blow out the relay enclosure.

 

B.    Low voltage on the main power source will make the relays chatter if 95 volts or

     below. Check voltage at screws S5, S6, S8, S16 and red control wires to be sure they

      are secured.

 

IV. TO REPLACE & INSTALL RELAYS (Disconnect all power sources)

 

A.    Disconnect all power source leads and load leads. Remove total enclosure from the    

     RV. If only replacing one relay, disconnect the wires on that relay and drill the rivets

      out of that relay from the back side. If replacing both relays, remove wire at S6, S7,

      S11 and drill out four rivets that hold the relays from the back side. This will allow the

      wires to stay on the relay and be easier to duplicate the wiring on the new relays.

      Install the new relay(s) with rivets of the same size removed. Replace wires according

      to wiring diagram.