Samlex Europe PST-300S-12E Owner's Manual - Section 9 |
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44 | SAMLEX AMERICA INC.
SECTION 9 |
Operation
normal operating conditions, AC output voltage will now be available at AC Socket and at
the AC output terminals for hardwiring (13, Fig 6.1b). The Green indicator light on the
GfCI will be lighted.
S
of the load.
witch on the AC load(s). The Green LED marked "POWER" (2, Fig 6.1a) normal operation
9.2 POWERING ON THE LOADS
After the inverter is switched on, it takes a
time to become ready to deliver full power.
Hence, always switch on the load(s) after a few seconds of switching on the inverter. Avoid
switching on the inverter with the load already switched on. This may prematurely trigger
the overload protection.
When a load is switched on, it may require initial higher power surge to start. Hence, if mul-
tiple loads are being powered, they should be switched on one by one so that the inverter is
not overloaded by the higher starting surge if all the loads are switched on at once.
9.3 TEMPERATURE CONTROLLED COOLING FAN
One thermostatically controlled cooling fan (18, Fig 6.1c) has been provided for forced air
cooling. Temperature of a critical hot spot inside the inverter (Power Transformer T6) is
monitored to activate the fan and the over temperature shut-down. When the temperature
of this hot spot reaches 55°C ± 3°C, the fan is switched ON. The fan will be automatically
switched OFF once the hot spot cools down to 45°C ± 3°C. Please note that the fan may not
switch ON at low loads or if the ambient temperature is cooler. This is normal.
9.4 INDICATIONS FOR NORMAL OPERATION
When the inverter is operating normally and supplying AC load(s), the Green LED marked
"POWER" (2, Fig 6.1a) will be lighted.
Please see Section 10 “Protections” and Section 11
"Troubleshooting Guide" for symptoms of abnormal operation.
9.5 NO LOAD DRAW (IDLE CURRENT)
When the unit is switched ON, all the circuitry inside the inverter becomes alive and the
AC output is made available. In this condition, even when no load is being supplied (or, if a
load is connected but has been switched OFF), the inverter draws a small amount of current
from the batteries to keep the circuitry alive and ready to deliver the required power on
demand. This is called the "Idle Current" or the "No Load Draw". Hence, when the load is
not required to be operated, turn OFF the inverter to prevent unnecessary current drain
from the battery.
!
CAUTION!
When the inverter is switched OFF using the optional external Remote Control
RC-300, there will be a very minor current drain of up to 3mA for the 12V ver-
sion of the inverter and up to 5mA for the 24V version of the inverter. There will
be NO drain from the battery when the inverter is switched OFF as follows:
When the inverter is switched ON, the Green LED marked "POWER" (2, Fig 6.1a) will be
lighted. This LED indicates that the input section of the inverter is operating normally. Under
SAMLEX AMERICA INC. | 47
10.5 OVER-TEMPERATURE SHUT DOWN
In case of failure of the cooling fans or in the case of inadequate heat removal due to
higher ambient temperatures /
air exchange, the temperature inside the
unit will increase. The temperature of a critical hot spot inside the inverter is monitored
(Power Transformer T3), and at 90°C ± 5°C, the AC output of the inverter is shut down
temporarily. Buzzer alarm will be sounded. The Green LED marked "
POWER
" (2, Fig
6.1a) will remain lighted.
The unit will automatically reset after t
he hot spot has cooled down to 65°C ± 5°C.
10.6 INTERNAL DC SIDE FUSES
The following DC side fuses have been provided for internal protection of the DC input
side. The fuses are 32V, Automotive Type Blade Fuses, Type "ATC" by Cooper Bussmann
or equivalent:
PST-300
S
-12
E
: 12 pieces of 30A in parallel = 360A total
PST-300
S
-24
E
: 12 pieces of 15A in parallel = 180A total
10.7 REVERSE POLARITY AT THE DC INPUT TERMINALS
The Positive of the battery should be connected to the Positive DC input terminal of
the inverter and the Negative of the battery should be connected to the Negative DC
input terminal of the inverter. A reversal of polarity (the Positive of the battery wrongly
connected to the Negative DC input terminal of the inverter and the Negative of the
battery wrongly connected to the Positive DC input terminal of the inverter) will blow
the external / internal DC side fuses. If the DC side fuse is blown, the inverter will be
dead. The Green LED marked "
POWER
" (2, Fig 6.1a) and the Green indication light on
the GfCI will be switched OFF and there will be no AC output.
i
INFO
Reverse polarity connection is likely to damage the DC input circuitry.
The internal fuse(s)
should be replaced with the same size of fuse(s) used in the unit. If the unit does not work
after replacing the fuse(s), it has been permanently damaged and will require repair /
replacement (
Please read Section 11 - “Troubleshooting Guide” for more details
).
!
CAUTION!
Damage caused by reverse polarity is not covered by warranty! When making battery
connections on the input side, make sure that the polarity of battery connections is correct
(Connect the Positive of the battery to the Positive terminal of the unit and the Negative of
the battery to the Negative terminal of the unit). If the input is connected in reverse
polarity, DC fuse(s) inside the inverter / external fuse will blow and may also cause
permanent damage to the inverter.
SECTION 10 |
Protections
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