SAMLEX AMERICA INC. | 49
APPENDIX A
4.4.2.23.3 Operating Sequence
1) AC input power is available – EVO operates in “Charging Mode”
2) AC input power fails: EVO transfers from “Charging Mode” to “Inverting Mode”
3) The battery continues to get discharged. When battery voltage (i) drops to value equal to / lower than
the “BATT LOW VOLTAGE” threshold
[Section 4.4.2.9]
for period equal to LV DETECT TIME
[Section
4.4.2.10]
or (ii) momentarily drops for 1 ms to 9V or below for EVO-2212/3012 or, 18V or below for EVO-
2224/4024, EVO’s Inverter Section is shut down and displays “Battery low voltage! fault / “Battery ultra
low voltage!” fault conditions respectively
[See Srls. 1 and 2 of Table 7.1, Section 7]
.
•
As parameter “LV CUT OFF TIME”
[Section 4.4.2.11.2]
has been set at 0 sec, the EVO does not
shut down completely but continues to remain in “Battery low voltage!” / “Battery ultra low
voltage!” fault condition
4) AC input power is restored and is within the programmed limits of frequency and voltage
5) EVO exits “Battery low voltage!” / “Battery ultra low voltage!” and starts operating in “Charging Mode”
(say, “Operating Condition 1”)
•
As soon as “Charging Mode” is activated, the Timer associated with parameter “SAFE
CHARGING”
[Section 4.4.2.23]
starts countdown:
o
The “SAFE CHARGING” Timer will countdown to “0” min if AC input remains on for more
than the programmed value of “t” min
o
The “SAFE CHARGING” Timer will NOT countdown to “0” min if AC input remains on for
period less than the programmed value “t” min
6) AC input fails again. The EVO will now operate as follows based on the condition of the “SAFE
CHARGING” Timer that recorded the time AC input was available
[“Operating Condition 1” mentioned at
Srl. 5 above]
:
•
“SAFE CHARGING” Timer value has counted down to 0 min:
EVO will operate in “Inverting
Mode”. As the batteries were re-charged for sizable time period > the programmed time “t"
of the "SAFE CHARGING" timer, the battery would have charged appreciably higher than the
“BATT LOW VOLTAGE” threshold. Hence, there is
LESS
likelihood that high inrush current from
the AC loads would drag the battery voltage down to 9V or lower for EVO-2212/3012 or 18V or
lower for EVO-2224/4024 to trigger “Battery ultra low volt!” fault condition
[See Section 7, Srl.
2 of Table 7.1]
•
“SAFE CHARGING” Timer value has NOT counted down to 0 min:
EVO will
NOT
go to Inverting
Mode but to “STANDBY” Mode
[See Screen No. 1, of STANDBY MODE screens in Fig 3.2]
. As
the batteries were re-charged for a short time period < the programmed time “t” of the "SAFE
CHARGING" timer (“Operating Condition 1” mentioned at Srl. 5 above), the battery would NOT
have charged appreciably higher than the “BATT LOW VOLTAGE” threshold. Hence, there would
be
MORE
likelihood that high inrush current from the AC loads would drag the battery voltage
down to 9V or lower for EVO-2212/3012 or 18V or lower for EVO-2224/4024 to trigger “Battery
ultra low volt!” fault condition
(See Section 7, Srl. 2 of Table 7)
that would require manual reset.
o
If the battery is charged through external charging source
[e.g. solar charging through
Charge Controller connected to the battery directly or, through terminals marked “EXT
Charger” on the front panel of the unit (3, 4 in Fig 2.1 in the attached Owner’s Manual
for EVO-2212/3012/2224/4024)]
to voltage threshold set by parameter “RESET VOLTAGE”
[Section 4.4.2.7]
, the EVO will change to “INVERTING MODE”
SECTION 4 |
Parameter Setup