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Shut-down due to reversal of polarity at the DC input terminals. 

The positive of the

battery should be connected to the positive DC input terminal of the inverter, (the tip of
the cigarette lighter plug), and the negative of the battery should be connected to the
negative DC input terminal of the inverter (The spring loaded bow type contacts of the
cigarette lighter plug). 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 DC side fuses

inside the inverter

If the DC side fuse is blown, the inverter will be dead. The LED (2)

will be switched off and there will be no AC output.

 

The internal fuse should be replaced

with the correct size of fuse shown under specifications. If the unit does not work after
replacing the fuse, it has been permanently damaged. Please call Technical Support for
assistance.

Shut-down due to over-temperature. 

In case of failure of the cooling fan or in the case

of inadequate heat removal due to higher ambient temperatures / insufficient air ex-
change, the temperature inside the unit will increase. The temperature of a critical hot
spot inside the inverter is monitored and at 95

C, the AC output of the inverter is shut

down temporarily. The

 

LED (2) turns orange and a buzzer is sounded. The unit will

automatically reset after the hot spot has cooled down to 70

C.

Shut down due to overload. 

The inverter can provide a higher than normal instantaneous

(< 1 second) power limited to the surge power rating of the inverter. Also, the inverter can
provide continuous power limited to the continuous power rating of the inverter. If there
is an overload beyond the specified limits, the AC output of the unit will be shut down
permanently. LED (2) will turn orange and buzzer alarm will be sounded. The unit will be
required to be reset manually by switching the unit off and on again. Before switching on
the unit, please remove the cause of the overload.

Summary of Contents for PST-15S-12A

Page 1: ...Owner s Manual Please read this manual before operating your Inverter DC AC Inverters PST 15S 12A PST 15S 24A...

Page 2: ...ion and Grounding 9 10 11 Limiting Electromagnetic Interference EMI 11 Powering direct embedded SMPS 12 Principle of Operation 13 Layout 13 Specifying Batteries Chargers and Alternators 14 15 16 17 18...

Page 3: ...s To ensure proper ventilation do not install in a low clearance compartment Preventing fire and explosion hazards Working with the inverter may produce arcs or sparks Thus the inverter should not be...

Page 4: ...t phase transformer isolated or auto transformer of suitable wattage rating 25 more than the wattage rating of the inverter with primary of 120 VAC and secondary of 120 240 VAC Two 120 VAC split phase...

Page 5: ...ble for use in buildings including homes for recreational vehicles boats and portable applications Will it be connected to the utility grid in some way Electrical conventions and safety standards diff...

Page 6: ...ter will further limit its ability to start a motor A battery bank that is undersized in poor condition or has corroded connections can be a weak link in the power chain The inverter cables and the ba...

Page 7: ...VAC To obtain 240 VAC from a 120 VAC inverter use a 120 VAC to 240 VAC transformer If you do not already have a pump installed you can get a 120 volt pump if you don t need more than 1 2 HP Idle powe...

Page 8: ...for resistive type of loads that have unity 1 Power Factor In a reactive type of load like electric motor driven loads fluorescent lights computers audio video equipment etc the phase of the sine wav...

Page 9: ...wave form is a sine wave with very low harmonic distortion and clean power like utility supplied electricity Inductive loads like microwaves and motors run faster quieter and cooler Reduces audible an...

Page 10: ...cted to earth Examples are the neutral conductor in AC wiring and the negative conductor in many DC systems A grounded system is a system in which one of the current carrying conductors is grounded An...

Page 11: ...to the AC power source The plug of the power cord has three pins two flat pins also called poles that are connected to the two current carrying conductors and a round pin which is connected to a non...

Page 12: ...bare metal Use star washers to penetrate paint and corrosion The inverter contains internal switching devices which generate conducted and radiated electromagnetic interference EMI The magnitude of EM...

Page 13: ...f up to 4 This will mean that for a particular rated RMS current applicable for a linear load the general purpose SMPS will draw much larger peak currents approx up to 4 times more than its rated RMS...

Page 14: ...and the pulse width of this switching is modulated with respect to a reference sine wave 1 120V AC output receptacle 2 L E D indicator 3 On Off Switch 4 Cigarette Lighter Plug 5 Cooling fan back of t...

Page 15: ...of deep cycle lead acid batteries wet and sealed A wet cell battery has a high tolerance to overcharg ing However it will release hydrogen gas when charging that must be properly vented and the water...

Page 16: ...is not linear but is more or less according to the table below Table 1 Battery Capacity versus Rate of Discharge Hours of Discharge Usable Capacity 20 100 10 87 8 83 6 75 5 70 3 60 2 50 1 40 Using th...

Page 17: ...l connection of batteries When two or more batteries are connected in series their voltages add up but their AH capacity remains the same For example when two 12 V 105 AH batteries are connected in se...

Page 18: ...low Let us say that the total AC Watts delivered by the inverter 1000 W Then using formula 2 above the DC current to be delivered by the 12 V batteries 1000 W 10 100 Amperes Next the energy required b...

Page 19: ...ese two sets of batteries through a battery isolator of appropriate capacity The battery isolator is a device that will allow the alternator to charge the two sets of batteries when the engine is runn...

Page 20: ...ol dry environment Do not expose to moisture rain snow or liquids of any type To reduce the risk of overheating and fire do not obstruct the suction and discharge openings of the cooling fan To ensure...

Page 21: ...the solar wind hydro charging source directly to the battery through the series connected switching MOSFET s The battery is a capacitive type of load and will thus dampen the input voltages of the cha...

Page 22: ...mended size of the cables will limit the voltage drop to approximately 2 The length of the cable for calculating the voltage drop has been taken as 2 times the distance between the inverter and the ba...

Page 23: ...lso pose a fire and safety hazard If an electrical breaker panel load center is fed from an inverter and this panel is also required to be powered from additional alternate AC sources the AC power fro...

Page 24: ...ck by detecting leakage and cutting off the AC source Installation in recreation vehicles RV may require GFCI protection on the AC output In addition electrical codes may require GFCI protection for c...

Page 25: ...the DC side circuit will still be alive even when the switch is in the off position Hence disconnect the DC and AC sides before working on any circuits connected to the inverter When the inverter is s...

Page 26: ...the inverter cable and fuse sizes on page 20 If the voltage at the DC input terminals falls below 10 5 V for PST 15S 12A or 21 V for PST 15S 24A a buzzer alarm will be sounded The LED 2 will continue...

Page 27: ...manently damaged Please call Technical Support for assistance Shut down due to over temperature In case of failure of the cooling fan or in the case of inadequate heat removal due to higher ambient te...

Page 28: ...y input circuit are tight Correct the polarity of the input connections and replace the internal fuse Note Reverse polarity may cause permanent damage If the unit does not work after replacing the fus...

Page 29: ...s working check that the ventilation slots on the suction side and the openings on the discharge side of the fan are not obstructed 3 If the fan is working and the openings are not obstructed check th...

Page 30: ...r factor of 0 8 to 0 6 The power that can be delivered to such type of loads will reduce by this factor See page 7 for details Low Input Voltage WarningAlarm 10 5V 21V Low Input Voltage Shut down 10V...

Page 31: ...t to remedy the defect by anyone other than the Warrantor shall render this warranty void There shall be no warranty for defects or damages caused by faulty installation or hook up abuse or misuse of...

Page 32: ...Version PST 15S 12A_24A Feb_2007 110 17 Fawcett Rd Coquitlam B C Canada V3K 6V2 T 604 525 3836 F 604 525 5221 e mail samlex samlexamerica com website www samlexamerica com...

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