Kohler EKOZD Series Service page 171

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.
Battery
current
Battery
voltage
Current constant, Voltage constant,
voltage increasing current decreasing
Stage 1: Fast Stage 2: Top-Off
Mode (Bulk) Mode (Absorption)
Figure 9-20 Three Stage Charging Curve
Parameter
Charger State Stage 1: Fast
Volts
< 75% of V
(Battery Voltage)
Amps
30- 90% of I
(Battery Current)
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
Fast charge transition voltage, 25C
V
FSTRAN
Float voltage, I
V
FLOAT
I Max current: V
FS
I Absorption mode transition current
ABTRAN
I Standby current, AC off
SBY
RMS AC voltage range
V
AC
I RMS AC current/15 V @ 15 amps
AC
Figure 9-22 Battery Charger Operational Parameters
TP-6953 7/19
Voltage constant,
full charge maintained
Stage 3: Float
Mode
Red Red/Green
(Solid) (Alternating)
Stage 2: Top-Off
75- 85% of V
FSTRAN
10- 30% of I
max
Description/Condition
< 1.0 A, 25C
OUT
= 12 V @ 100 VAC, 25C
BATT
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.
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.
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
Green
(Solid)
Stage 3: Float
85- 95% of V
FSTRAN FSTRAN
< 10% of I
max max
GM105398
(12 volt)
14.4
13.5
8
1.8
-
-
-
Section 9 Component Testing and Adjustment
In very high
On/Off
(Flashing)
Checking State
> 95% of V
FSTRAN
> 90% of I
max
GM105399
(24 volt)
Tolerance
28.8  0.5
27.2  0.5
8  1.0
1.5  0.5
< 2.5
-
- 85- 140
- 2- 4
ambient
If the over
Off
(Solid)
Fault
-
-
Units
VDC
VDC
Amps
Amps
mA
VAC
RMS
171