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Unread 05-22-2009, 05:44 PM   #1
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Smile 48v charger hums but amps read 0

I have a 00 club car, each battery reads 8.5V, but when i plug the charger in it hums but the amps read 0,
some say join 2 wires in the charger together to override the low voltage check, others say hook a 12v charger to each battery for no more that 30 minutes.. so i'm not sure which way to turn
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Unread 05-22-2009, 05:48 PM   #2
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Default Re: 48v charger hums but amps read 0

if you have 8.5 volts per battery theres no need to bypass the low voltage sensor........i think your problem might be with the charger like a diode failure or ampmeter....i,m not sure which one.......................................
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Unread 05-22-2009, 07:49 PM   #3
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Default Re: 48v charger hums but amps read 0

what kind of charger?
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Unread 05-23-2009, 09:07 AM   #4
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Default Re: 48v charger hums but amps read 0

club car powerdrive
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Unread 05-24-2009, 09:05 AM   #5
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Default Re: 48v charger hums but amps read 0

http://www.lesterelectrical.com/tech...otingguide.pdf

Part C Relay closes, and transformer hums,
but ammeter does not register
If the relay closes and the transformer hums, the
charger AC circuit and Electronic Timer Kit are
functioning properly. If the ammeter does not
register, a fault in the charger DC circuit exists and a
continuity check must be performed. Disconnect the
power supply cord from its outlet and the DC output
connector from the battery connector, and check the
charger fuse. If a fuse link is blown, refer to Section
2, "Charger Fuse Blows", for further tests. If the fuse
checks good, use a low voltage continuity tester to
perform the following tests:
1. Connect the tester leads to the charger DC
output connector and note the readings.
Reverse the tester leads and check the output
connector again. The circuit should be complete
in only one direction. If the circuit does not
conduct in either direction and the fuse is good,
Troubleshooting Guide 4 31039B
individually check the continuity of the DC output
cord, ammeter, diodes, and all connections. If
the circuit conducts in both directions, a "short"
exists in the charger DC circuit. First check the
DC output cord for a "short" between the two
wires. It is more likely that one or both diodes
have "shorted". Refer to Section 2, "Charger
Fuse Blows", for continuity test of diodes.
2. If the charger DC circuit test is good, a check of
the capacitor is necessary. Disconnect the
power supply cord from its outlet and the DC
output connector from the battery connector.
Then disconnect both transformer coil leads
from the capacitor terminals. Use care when
disconnecting the capacitor leads so the wires
do not break. Using an ohmmeter, set the scale
to R x 10K ohms and test the capacitor as
follows:
GOOD CAPACITOR When the ohmmeter leads are
connected to the capacitor
terminals, the meter needle jumps
to mid-scale and rapidly moves to
higher resistance (:)
OPEN CAPACITOR When the ohmmeter leads are
connected to the capacitor
terminals, the meter needle does
not move and stays at high
resistance (:). A bulge in the top of
the capacitor may be visible if the
capacitor has failed "Open".
SHORTED CAPACITOR When the ohmmeter leads are
connected to the capacitor
terminals, the meter needle jumps
immediately to zero ohms and
remains there.
If the capacitor is "Open" or "Shorted", it must be
replaced.
CAUTION: USE ONLY THE PROPERLY
RATED CAPACITOR FOR REPLACEMENT. THE
USE OF A DIFFERENT VALUE CAPACITOR MAY
RESULT IN IMPROPER CHARGING, CAPACITOR
FAILURE, TRANSFORMER BURN-OUT, AND/OR
BATTERY DAMAGE.
3. If the charger DC circuit and capacitor check
good, a test of the transformer is necessary.
Refer to Section 7, "Transformer Short or Burnout"
for test procedures.
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Unread 05-24-2009, 09:28 AM   #6
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Default Re: 48v charger hums but amps read 0

If your charger model is different try this search on Lester's site:

http://www2.lesterelectrical.com/search/

Once there enter your five digit Lester model number and press Search button!
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Unread 05-26-2009, 08:52 AM   #7
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Default Re: 48v charger hums but amps read 0

thanks for the info.. what if the charger doesn't click before it hums?
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Unread 05-26-2009, 09:06 AM   #8
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Default Re: 48v charger hums but amps read 0

Quote:
Originally Posted by dudley99 View Post
thanks for the info.. what if the charger doesn't click before it hums?
I'd click on the link for Lester and visit their trouble shooting pages since they do know best about their products.
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Unread 05-26-2009, 10:26 AM   #9
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Default Re: 48v charger hums but amps read 0

If the charger hums, then the click (relay pulling in) had to happen.

Check the fuse under the plastic cover on the back of your charging socket on the cart. (Mine fuse element broke just by tightening the wires to the terminals.)
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Unread 05-28-2009, 12:13 PM   #10
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Default Re: 48v charger hums but amps read 0

well.. i tried the charger on another cart.. and it works fine.. i'll check the fuse this weekend.. hopefully that's the cause
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