JLG 3246ES Service Manual - Manual (Page 82)

SECTION 3 - CHASSIS & SCISSOR ARMS
3-46 – JLG Lift – 3121166
[5 Flashes] - Over Temperature
This fault indicates the charger has become too hot dur-
ing operation. Though not damaging to the charger,
charge time will be extended significantly.
1. This fault indication will not clear automatically,
but the charger will restart charging automatically
when the temperature drops. The fault indication
must be cleared manually by unplugging the AC,
waiting 30 seconds and reconnecting the AC
power.
2. If possible, move the machine to a cooler location.
3. Confirm that dirt or mud is not blocking the cool-
ing fins of the charger. Clean the charger. Rinse the
charger with a low pressure hose if required. Do no
use high pressure. Do not us a pressure washer.
[6 Flashes] - Over Load/Over Temperature
This fault indicates that the batteries will not accept
charge current, or an internal fault has been detected in
the charger. This fault will nearly always be set within
the first 30 seconds of operation. If it occurs after the
charger has started charging normally, be sure to make
a note of it.
1. Remove excessive AC loads from inverter if
installed.
2. Try to clear the fault by unplugging the AC, wait-
ing 30 seconds and reconnecting the ac power.
3. Check all battery connections. Look for a high
resistance connection.The most likely reason for
this fault is a fault in the battery such as a bad bat-
tery connection, an open cell, or insufficient water.
4. This fault will occur if an internal fuse inside the
charger blows. If the green wire is shorted to
ground even momentarily, this fuse will blow. To
check the fuse, measure with an ohmmeter
between the green and red wires with the AC dis-
connected. If a short circuit is not measured, the
fuse has blown. Return unit to a service depot to
have this fuse replaced.
5. If this fault occurs after battery charging has
started, confirm that AC power was not inter-
rupted and that all battery connections are good.
6. If all battery connections are good, an internal
fault has been detected and the charger must be
brought to a qualified service depot.
Excessive Battery Watering Requirements or Strong
Sulphur (Rotten Egg) Smell
These symptoms indicate over-charging or high battery
temperature. These symptoms are unlikely to be caused
by too high a charge current since the maximum charge
current of the charger will be small compared to even a
moderately sized battery pack. The most likely cause for
this problem is incorrect charge algorithm setting and/
or high ambient temperatures.
1. Confirm that the battery pack is not too small -
usually > 50Ah.
2. Confirm that the nominal battery voltage matches
the charger output voltage.
3. Confirm the correct battery charge algorithm. If
the battery pack is new, the algorithm will need to
be changed if the pack is not the same as the old
one. for instructions on how to determine and
change the battery charge algorithm see the fol-
lowing sub-section.
4. If the output voltage of the charger seems exces-
sive, return the charger for service. Contact JLG to
get the expected battery voltage settings for the
charger in question. Be sure to have the charger’s
serial number and charge algorithm setting avail-
able when calling.