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Symptom
No or low output
No switched output
Turn-on or turn-off delay greater than 3
seconds
Wiring or connectors overheating
Indication
AC on LED lit, charger won't start charg-
ing.
Excessive battery watering or strong sul-
phur (rotten egg) smell
Charger operates at low current only
Charger restarts automatically
Difficulty changing the default battery
charge algorithm
3121634
Table 3-8. Charger/Converter Troubleshooting
Input voltage out of range:
35 - 87V for the 48V model
50 - 130V for the 72V model
Unit overheating - increase cooling air flow
Short circuit detected
Poor connections - Inspect connections
Converter damaged
Switched input voltage out of range:
8 - 87V for the 48V model
8 - 130V for the 72V model
Switching input circuit damaged from high voltage
Poor connections - Inspect connections
Switched input circuit variability - no action required
Wire gauge too small (minimum 18AWG)
More than 18A drawn from single connector
Table 3-9. Other Conditions
Charger has detected a condition that does not allow it to charge
This condition is generally corrected by resetting the charger by removing AC power for 30 seconds and reconnecting it.
Overcharging 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.
Confirm that the battery pack is not too small - Delta-Q chargers are usually used with batteries larger than 50Ah.
Confirm that the nominal battery voltage matches the charger output voltage.
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. Refer to the Product Manual for instructions on how to determine and change the battery charge algorithm.
If the pack is older, it is possible sulphation has taken root. Increased resistance of the battery pack due to this will cause excessive heat and
water usage.
Delta-Q charge algorithms only operate at a low current, usually 2-5A if the battery voltage is less than 2.0V/cell. This is to slowly recharge an
over discharged battery to avoid damaging it.
Check the battery pack voltage, if it is <2.0V/cell then this low current is normal.
There are two features of algorithms that may cause this:
Maintenance Mode - charger automatically restarts after 14d or 30d, or when the battery voltage falls below 2.08V/cell or 1.5V/cell. These
settings are algorithm dependent.
Battery overvoltage - If the battery is very resistive, sometimes in new batteries, the voltage may rise so quickly the charger trips off due to
overvoltage. It will then restart the charge cycle when the voltage falls back into range.
The mode to change the battery charge algorithm can only be selected during the first 10 seconds of operation. Refer to the Product Manual
for instructions.
If the 10 second window is missed, cycle AC power by unplugging the charger, waiting 30 seconds, and reconnecting AC power.
To extend Battery Charge Algorithm Change Mode by 30 seconds (120 seconds on newer models), connect the charger output to a good bat-
tery for approximately 1 second and then disconnect the battery again.
SECTION 3 - CHASSIS & TURNTABLE
Possible Causes and Solutions
Explanation and Solution
3-63
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Table of Contents
Troubleshooting
