Sima Products SIMA 140 watt Power Inverter M-SERIES Benutzerhandbuch

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Installation 
 
Needed for Installation (not included) 
Mounting hardware for the inverter 
Tools 
 
Mounting 
Step #1: The STP-150 should be mounted on a solid flat surface capable of 
handling the weight of the unit, with space around the unit for ventilation. It 
is very important that the unit be secured using the proper sized mounting 
hardware (not included) to keep the unit from moving around or becoming 
loose in emergency situations. 
 
CAUTION:  The power inverter must be mounted securely in any 
type of moving vehicle. In an emergency situation, if the power 
inverter is not securely mounted, it could cause bodily injury  
 
 
Connection to Power Source  
The STP-150 requires connection to a standard 12 volt DC power source as 
found in most cars, trucks, RVs and boats. The power source must provide 
between 11 and 15 volts DC. The power source must be able to provide 
sufficient current to power the load. At full power, the STP-150 will draw 
about 15 amps. The STP-150 comes with a cigarette lighter plug for easy 
connection to the power source. The tip of the plug is positive and the side 
contacts are negative. Insert the plug into a cigarette socket by pushing 
firmly for a good connection. A red indicator light on the adapter will light up. 
Do not use a 12V extension cord with this unit. 
 
Testing the Power Inverter 
Make sure the 12 volt power source is wired properly to the power 
inverter. With nothing plugged into the 115 VAC outlets, turn on the power 
switch of the STP-150. 
If the green power light does not come on, turn the power switch off and 
check your wiring and external fuse. 
With the inverter turned off, plug the appliance you want to use into the 
115 VAC power outlet on the unit.  Turn on the power switch of the STP-
150. The appliance should now be operational. 
 
Operation 
 
Equipment Power Usage 
It is important to use only products that draw less than 150 watts with the 
STP-150. Use of products greater than 150 watts may either cause the 
protection circuitry of the STP-150 to shut down or the fuse to blow. 
Repeated use of excessive power draw can cause failure of the STP-150. 
 
How to calculate power usage.  
Most products have a power rating on them such as 45 watts. Others may 
be marked with their current draw, such as .9 amps. To convert the current 
to watts multiply the current by 115. Thus .9 amps x 115 = 104 watts. 
 
Turn the unit on 
Plug the appliance you want to use into the 115 VAC power outlet on the 
STP-150 (see Fig. 1 below). Turn on the power switch of the STP-150 so 
the green power light is illuminated. Turn on the appliance. The appliance 
should now be operational.* 
 
      
 
Fig. 1  
            
 
Note :  Some products, such as televisions, draw a high surge current to 
start up. If the appliance does not operate and the inverter turns off, you 
may need a larger inverter. Check that the battery and the 12V wiring to the 
inverter is large enough to handle the current draw. Be sure the battery is 
fully charged. You may need to turn the power switch the STP-150 on and 
off a few times to get the appliance “started”. Some motors and televisions 
may require this technique to get them operational.  
 
Typical Power Usage Chart 
Typical Appliance 
Typical Appliance 
Current Draw 
Cellular phone charger 
20 watts 
Camcorder 30 
watts 
VCR 45 
watts 
Soldering iron 
45 watts 
Laptop computer 
70 watts 
13” TV 
70 watts 
100 watt work light 
100 watts 
Small stereo system 
120 watts 
 
Important:  The STP-150 will not operate most appliances 
designed to produce heat such as hair dryers, heaters, toasters, 
and coffee makers. 
 
 
Important
:  The STP-150 can draw up to 15 amps from your car’s battery 
when operating. If you are using it for extended periods of time, you will want 
to operate your car occasionally to maintain the charge in your car’s battery. 
The STP-150 will also draw a small current when not operating, so it should 
be disconnected from your car’s battery if your vehicle will not be used for a 
few days.
 
 
Lights and Alarms
 
Power Indicator (Green light) 
The green light is illuminated when the inverter is turned on and is operating 
normally. If this light goes out, either the 12 volt power supply is missing 
(possible blown fuse) or some fault condition has occurred. These fault 
conditions include: output overload, output short circuit, low input voltage and 
over-temperature of the unit. This can happen if a device has a large start-up 
surge, if an appliance (like a drill or saw) is stalled or if the inverter does not 
have a circulating supply of cool air.  
Overload Fault (Red light) 
The red light is illuminated when a current overload fault is detected. 
An overload fault occurs when the power draw exceeds the inverter’s 
maximum capability. 
An under-voltage fault (beep) 
An under-voltage fault can occur when the input voltage reaches about 
10.2 volts. The STP-150 will sound a continuous alarm and shut off when 
the input voltage drops to 9.6v to protect your battery from being completely 
discharged.  
An over-temperature fault  
An over-temperature fault occurs when the STP-150 internal circuitry gets 
too hot due to overload or improper air circulation. The STP-150 will turn off 
the green power light and the unit will turn off. 
 
Fuse Replacement (see figure 2) 
If you overload the STP-150, it is possible that the fuse in the cigarette plug 
might blow. If this happens, unplug the cigarette plug from the power source, 
wait for the tip to cool and unscrew the metal tip on the plug. Remove the tip. 
Remove the fuse and install a new fuse rated at 15 amps. Never use a fuse 
greater than 15 amps
. Replace the tip and screw firmly but do not over 
tighten. Always determine why the fuse blew and remedy the problem before 
using the STP-150 again.
 
                                                
 
Fig. 2 
 
Troubleshooting Guide
 
Problem
Possible cause
Solution 
• Unit does not 
• Input voltage is 
•  Attach to proper power 
• Unit operates 
• Load is trying to 
•  Be sure the load is less than 
• Unit operates 
• Inverter is in 
•  Allow inverter to cool down. 
• Low battery 
• Input voltage is 
•  Make sure car engine is 
• Television and 
• RF interference 
•  Position the power inverter 
• 115 VAC 
• Modified sine wave 
•  Use a true RMS meter like a 
 
Product Specifications 
Max. continuous power output 
150 watts 
Surge (peak) power output 
300 watts 
Input voltage range 
11 to 15 vdc 
No load current draw 
< 0.2 amp 
Full load current draw 
15 amps DC 
Low battery alarm/shut-down 
10.2 V, +/-  0.5 V 
Efficiency 90% 
Output waveform 
Modified sine wave 
Weight 1.2 
lbs. 
Size 
5.7” x 4.3” x 2”
 
Battery Life Chart