Kohler 20EKOZD

TP-6953 7/19 171Section 9 Component Testing and Adjustment
Stage 3: Float Mode
Float mode is the final stage of the charging routine.
During float mode, the voltage on the battery is held
constant and maintained at approximately 13.5 volts for
a 12 volt battery. This voltage will maintain the full
charge condition and protect the battery from
overcharging.
Stage 3: Float
Mode
Stage 2: T op-Off
Mode (Absorption)
Stage 1: Fast
Mode (Bulk)
Battery
current
Voltage constant,
current decreasing
Voltage constant,
full charge maintained
Battery
voltage
Current constant,
voltage increasing
Figure 9 -20 Three Stage Charging Curve
9.12.2 Protection Modes
Note: See Figure 9-21 for battery charger LED
indicator information.
Over Temperature: The charger enters a fault state
indicated by the:
Charger State LED OFF,
Volts LED Flashing, and
Amps LED Flashing.
The charger shuts down until it cools off and then
restarts automatically. In very high ambient
temperatures, it is possible for the non-auto reset
thermal protection to activate.
Over Voltage/Current: The charger enters a fault state
indicated by the:
Charger State LED OFF,
Volts LED Flashing, and
Amps LED Flashing.
The fault activates in the event of a regulation
malfunction and inhibits the charger. If the over
voltage/current condition persists, contact the factory.
Note: Never operate a charger that has been damaged
in any way or try to disassemble it.
LED Indicators
Parameter
Red
(Solid)
Red/Green
(Alternating)
Green
(Solid)
On/Off
(Flashing)
Off
(Solid)
Charger State Stage 1: Fast Stage 2: Top-Off Stage 3: Float Checking State Fault
Volts
(Battery Voltage)
< 75% of V
FSTRAN
75- 85% of V
FSTRAN
85- 95% of V
FSTRAN
> 95% of V
FSTRAN
-
Amps
(Battery Current)
30- 90% of I
max
10- 30% of I
max
<10%ofI
max
> 90% of I
max
-
Figure 9 -21 Battery Charger LED Indicators
9.12.3 Charger Operation
The LED indicator lights informs the user of the progress of the
charging cycle and confirms proper connections. The critical
operational parameters are shown in Figure 9-22:
Parameter
Description/Condition
GM105398
(12 volt)
GM105399
(24 volt)
Tolerance Units
V
FSTRAN
Fast charge transition voltage, 25C 14.4 28.8  0.5 VDC
V
FLOAT
Float voltage, I
OUT
< 1.0 A, 25C 13.5 27.2  0.5 VDC
I
FS
Max current: V
BATT
= 12 V @ 100 VAC, 25C 8 8  1.0 Amps
I
ABTRAN
Absorption mode transition current 1.8 1.5  0.5 Amps
I
SBY
Standby current, AC off
- -
<2.5 mA
V
AC
RMS AC voltage range - - 85- 140 VAC
I
AC
RMS AC current/15 V @ 15 amps - - 2- 4 RMS
Figure 9 -22 Battery Charger Operational Parameters