"3072ES / 3772ES / 3772ES HD" Service & Parts Manual October 2008
Page 4-41
Dual Battery Chargers, HB750-24 (Early Models)
ART_2373
DO NOT CHANGE THE INPUT V
0306070098
BEFORE “ALL THE LEDS TURN OFF”
HB750-24
HB750-24
Please see service manual for additional information.
100% charged
75% to 100% charged
50% to 75% charged
0 to 50% charged
ON
ON
ON
50%
Blinking
ON
ON
Blinking
OFF
ON
Blinking
OFF
OFF
75% 100%
BATTERY CHARGER
INDICATOR
90826
LEDs
To determine if a charger is malfunctioning, identify the problem from the following list and refer to the
Trouble Table
for instructions.
1. Charger does not turn on
2. All 3 LEDs blink simultaneously
3. 100% LED blinks while 50% and 75% LEDs are OFF
4. Batteries do not fully charge
5. The AC supply circuit breaker or fuse is blown
6. GEL LED is ON.
If the problem is not listed above, refer the problem to a qualified service agent for additional trouble
shooting procedures.
Note: Over 1/2 of all battery chargers returned as “failed” are good. Please
follow the troubleshooting procedures carefully and check all other
items before returning the charger.
LED Status Description
Fault Output is open or short, or output voltage is over a limit.
Otherwise, output terminals are reversed.
All 3 LED lamps blink once
simultaneously.
All 3 LED lamps blink twice
simultaneously.
Input voltage is out of the range
All 3 LED lamps blink three
times simultaneously.
The internal temperature of the charger exceeds a limit.
All 3 LED lamps blink four
times simultaneously.
Output current exceeds a limit.
Warning 100% LED lamp blinks. Battery pack has a bad cell.
Operation
Mode
GEL LED ON
Charger in GEL mode. Yellow wire loop on back of charger
damaged, cut or broken.
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