Battery Charger Not Functioning Properly - JLG T350 Troubleshooting Manual

1.5 BATTERY CHARGER NOT FUNCTIONING PROPERLY

Delta-Q Charger Normal Operation Description
Stage
Startup The charger will automatically turn on and go through a short self-test with the LED indicator alternating red-green for two sec-
onds. If the charger is connected to a battery pack, a trickle current will be applied until a minimum voltage is reached. If the
charger is used in an off-board application and the charger is waiting to be plugged into a battery pack, the charging algorithm
number will be displayed for 11 seconds before ultimately displaying an under-voltage fault (fault disappears when plugged
into battery pack). Typically lasts from 5 seconds to 2 ½ minutes.
Bulk Typically, 80% of the total recharge is restored during the bulk phase where a constant 25 Amp output is being delivered. This
time varies depending upon the depth of discharge.
Absorption Output reduced to prevent sulfation build up. Time depends upon the initial level of battery charge and varies from 1hour mini-
mum to 5 ½ hours. At completion of this phase, 90% charge has been obtained.
Finish Delivers 6A for at least 1 hour to finish charge.
There will be a cut back in output any time the charger is below 108 VAC. ANY interruption where there is power loss causes
the charger to reset. If left plugged in, the charger will restart in 30 days or when the Voltage drops
Step Pretest Instructions
1.5.1
1.5.2
1.5.3 Check the voltage on each bat-
tery. 25% - 6.12 V, 100% =
6.32 V
1.5.4 Using a hydrometer - Check
the specific gravity in each
battery cell. 25% charged is
1.155, 100% = 1.265
3121203
Battery Charge Level and Normal Charging Time
Number of
Battery Charge Level
Cycles
15 75% (24.8V)
30 50% (24.2V)
50 20% (23.4V)
66 0% (less than 23.2V)
Test
Does charger go through
proper LED sequencing upon
start up?
Is the red LED on?
Do all batteries have at least
6.12V?
Is the specific gravity of all bat-
tery cells between 1.155 and
1.265?
SECTION 1 - TROUBLESHOOTING BY FUNCTION
Description
Recharge time (hours)
12
13.1
14.7
15
Result
Yes
No
Yes
No
Yes
No
Yes
No
T350 T500J
Corrective Action
Go to step 1.5.2
Check AC power supply.
Possible Causes: 4.1.1, 4.1.3, 4.1.4
Do some function to cause draw on the
battery, then start again. Otherwise, go to
step 1.5.3
Go to step 1.5.4
Possible Causes: 4.1.4
Possible Causes: 4.1.8
Possible Causes: 4.1.4
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