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.