Toro Marine Battery SA41 User Manual

SELECTRONIC AUSTRALIA  
SA41 OWNERS MANUAL  
Contents:  
Page  
Rev 5  
1
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A
N
To circuit breakers  
for other circuits  
SUPPLY  
INSTALLATION  
Earths  
Inverter  
System Fuse  
Earth Leakage  
Circuit Breaker  
(E.L.C.B.)  
E.L.C.B.  
main switch  
Active  
Earth  
Neutral  
Rear  
junction  
Box  
Battery  
bank  
A
N
E
Power  
Circuits  
S1  
S2  
GND  
RFI / Lightning Earth  
As close as possible to inverter  
MUST BE BONDED TO  
ALL OTHER EARTHS  
Neutral Link  
ALL AC AND DC WIRING  
MUST CONFORM TO  
RELEVANT STANDARDS  
GND Safety Earth  
Ground connection to  
general mass of earth  
We suggest that you house your inverter along with other power generating equipment in a remotely  
sited purpose built area. Also make sure that the exhaust from your generator or other sources of heat or  
fumes are kept well away from the SA41. SEIAA (Solar Energy Industries Association Of Australia)  
installation guidelines must be followed.  
You must have a suitable 48V DC battery bank which is maintained and operated to the battery  
manufacturer’s recommendation. To ensure operation to SA41 specification, the battery bank should  
have a minimum capacity of 500 ampere hours, at the 100 hour discharge rate (ask your supplier if in  
doubt). Smaller capacity batteries can be used but may result in degraded performance of the SA41  
under heavy surge conditions.  
CONNECTION OF AC AND DC WIRING  
IMPORTANT: Before making any wiring connections, check that the circuit breaker located on the  
front panel is in the OFF position, i.e. LEVER DOWN.  
Your electrician should firstly connect the AC wiring via the three terminal rear junction box. Carefully  
observe the correct connections. Please refer to the rear panel view of the SA41 on the following page.  
BROWN  
GREEN/YELLOW EARTH  
BLUE NEUTRAL (Bottom connector)  
ACTIVE (red dot, top connector)  
(E, centre connector)  
The lid of the junction box has knockouts to allow conduit entry. Make sure the connections are tight  
and safe. Re-fit junction box cover.  
NOTE:  
ALL AC WIRING MUST BE CARRIED OUT BY A LICENSED ELECTRICIAN  
AND MUST CONFORM TO AS 3000 WIRING REGULATIONS,  
OR RELEVANT STANDARDS.  
Verify that the circuit breaker on the front panel is in the OFF position, LEVER DOWN.  
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Now connect the battery cables:  
RED = BATTERY POSITIVE (+)  
BLACK = BATTERY NEGATIVE (-)  
These connections should be tight. If using nuts, bolts and washers, they should be stainless steel. At  
this point re-check the connections before proceeding any further.  
NOTE:  
IF THE SA41 EMITS A PULSING BUZZER SOUND, THE BATTERY LEADS HAVE BEEN  
CONNECTED IN REVERSE. IMMEDIATELY DISCONNECT THE LEADS AND RECONNECT  
WITH THE CORRECT POLARITY. DO NOT UNDER ANY CIRCUMSTANCES TURN ON THE  
BREAKER WHEN THE BUZZER IS PULSING AS PERMANENT DAMAGE TO THE SA41  
WILL RESULT.  
If all is well, turn the breaker ON, i.e. switch lever UP. If after two (2) attempts the circuit breaker does  
not turn on, then check that the battery voltage is between 40 and 68V DC. If the breaker still won't  
switch on, refer to the FAULT FINDING section of this manual.  
4
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OPERATION  
To gain more understanding of these operational notes, it is suggested that they be read in conjunction  
with hands on access to an inverter with DC power applied.  
When you first apply power to the SA41 with default factory settings, the SA41 should be in  
STANDBY mode. There may be a quiet pulsing sound and the red neons on the power point will flash  
if turned on. The SA41 is now ready for use with no further adjustments necessary, using the factory  
settings.  
If the display shows TIME, the default settings have been changed, and the day and time will need to  
be set before the display will return to STATUS.  
ENERGY MANAGEMENT  
The SA41 incorporates ENERGY MANAGEMENT, which allows you to monitor and control your  
energy system by displaying information on the Liquid Crystal Display. Settings can be adjusted via  
the front panel keys.  
STATUS  
Status : STANDBY  
Inverter : OFF  
Status : CONT  
Inverter : ON  
Status : RESET  
Inverter : OFF  
The first screen will display the Status of the SA41. There are three status conditions: STANDBY,  
CONT (continuous) and RESET, which are explained in more detail below.  
When this screen is displayed, the Status can be changed by pressing the UP or DOWN keys. Each time  
the UP key is pressed, the status will change from STANDBY to CONT then RESET and back to  
STANDBY whereas the DOWN key will change the Status in the reverse order.  
The second line indicates whether the inverter is ON or OFF, i.e. if there is 240V available or not.  
During pulsing, OFF is displayed on the second line, reverting to ON when a load is connected and the  
inverter starts.  
The STANDBY mode means that the SA41 is producing pulses of power while waiting for an  
appliance to be switched on. This is frequently called the “demand start” because as soon as the  
appliance is operated, the SA41 will turn on and remain on until the appliance is switched off. After a  
10 second delay, the SA41 will return to STANDBY mode, awaiting another load.  
This feature is extremely important as it conserves valuable battery power when no appliances are on.  
CONT mode (continuous) means the inverter will be on at all times regardless of the load. This  
situation is useful if you have small loads such as VCRs or digital clocks that require 24 hour power, or  
if loads are too small to be sensed in the STANDBY mode. The only disadvantage is that when no  
appliances are operating, the SA41 will be drawing more power than it would in STANDBY mode.  
RESET mode electronically shuts down the inverter. When placed in this mode, any overload or  
shutdown conditions are also reset.  
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READINGS  
The SA41 ENERGY MANAGEMENT has six "Readings" displays to give you vital information  
about your inverter and your batteries. By pressing the 'NEXT DISPLAY' key on the front panel, the  
screen information rotates through displays of inverter Status, Time, AC Volts, AC Amps and Battery  
Volts. When the optional current shunt (SA-S200) is installed, four additional readings are available;  
these being Nett DC Current, Peak Charge Current, Nett Daily Amp Hours and Battery percentage  
Charge.  
TIME  
Displays the Current Time (as a 24Hr clock) and day. This time is set as  
described in "Settings" (see Page 8).  
Mon : 15:06  
- - - Readings - - -  
AC VOLTS  
AC Volts : 240V  
- - - Readings - - -  
This screen gives an approximate indication of the AC voltage produced by  
the inverter. The AC volts would normally read between 230V and 245V  
except under high load or low battery conditions.  
AC AMPS  
AC Amps : 2.5A  
- - - Readings - - -  
The AC current reading shows the total current drawn from the AC output  
by the appliances connected to the inverter.  
BATTERY VOLTS  
Displays the DC Battery volts. This provides you with an indication of the  
condition of your battery bank.  
Batt Volts : 49.2V  
- - - Readings - - -  
WHERE THE OPTIONAL 200 AMP CURRENT SHUNT IS INSTALLED:  
DC CURRENT  
Amps : 23.6A OUT  
- - - Battery - - -  
This reading gives a Nett current; i.e., either charging the battery (IN) or  
being taken out of the battery (OUT). The range for this reading is 0-100A  
IN and 0-200A OUT continuous or 0-400A OUT intermittent.  
PEAK AMPS  
Pk Amps : 45.6 IN  
- - - Battery - - -  
This reading gives the peak Nett charging current into the batteries for the  
present day (today). If no load has been present for the entire day, this will  
indicate the peak combined charging current from your solar panels, wind  
generator or other charging sources, thus allowing you to monitor their  
operation. During the first day after the inverter is turned on at the circuit  
breaker, this screen will display a meaningless figure.  
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NETT AMP HOURS TODAY  
This reading gives a nett figure of Amp Hours since midnight last night. A  
Net AH : 69 IN  
- - - Today - - -  
nett AH reading of IN indicates more Amp Hours have gone into the  
battery than have been used. The opposite applies for a Net AH reading of  
OUT.  
1 Amp Hour = 1 amp for 1 hour, or 2 amps for ½ hour, etc.  
BATTERY CHARGE  
Charge : 87%  
- - - In Battery - - -  
This reading shows the amount of charge present in you battery bank at any  
given time. i.e. 100% means a fully charged battery.  
MINIMUM CHARGE  
With the optional current shunt (SA-S200) installed, the minimum charge in your batteries today, this  
week or for a number of weeks or days can be logged (Minimum daily discharge). Minimum charge  
readings are accessed by pressing the UP and DOWN keys together for 1 second.  
These vital readings give you the information you need to maximise your battery life. This is done by  
managing your loads to maximise this figure, e.g. using heavier loads later in the day or at other times  
when the battery charge is high.  
MINIMUM CHARGE TODAY  
The minimum charge in the battery since midnight last.  
MIN CHARGE : 76%  
- - - In Batt Today - - -  
MINIMUM CHARGE THIS WEEK  
The minimum charge in the battery since midnight last Saturday.  
MIN CHARGE : 76%  
- - - In Batt This Wk - - -  
MINIMUM CHARGE WEEKLY LOG  
This displays a log of the minimum weekly charge in the battery for up to  
52 weeks. The logged weeks may be stepped through by pressing the UP or  
DOWN key. The weeks that have not logged AH as yet will display 255%.  
Weeks ago : 1  
Min Charge : 76%  
MINIMUM CHARGE DAILY LOG  
This displays a log of minimum daily charge in the battery for up to 30  
days. The logged days may be stepped though by pressing the UP or  
DOWN key. The days that have not logged AH as yet will display 255%.  
Days ago : 1  
Min Charge : 76%  
7
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SETTINGS  
There are a number of settings within the SA41 that can be changed via the front panel push keys (push  
buttons). These allow you to tailor the SA41 inverter and ENERGY MANAGEMENT sections to suit  
your system requirements.  
Settings are accessed by holding down the NEXT DISPLAY key for at least 1 second whilst in any  
"Readings" display. The value of the parameter displayed can be modified by pressing the UP or  
DOWN keys.  
Pressing the NEXT DISPLAY key will take you to the next parameter to be set. Pressing the NEXT  
DISPLAY key after the last parameter is displayed will take you back to the "Readings" displays.  
Please note: If DC power is disconnected from the inverter, the "Settings" which have been entered  
will be saved and held in permanent memory. However these settings are not saved until the display is  
returned to "Readings".  
CONTROLLER OUTPUTS  
The SA41 ENERGY MANAGEMENT has 2 control outputs, as mentioned on page 25, each of  
which can be activated with time, inverter cutout and/or low ampere-hours. The six settings are  
displayed as OFF, ON, TIME, INV CO, LO A/H and CO+LAH respectively  
For simplicity, the displays shown are for control output 1 only. Control output 2 settings are identical  
to control output 1. Pressing the UP or DOWN keys will change the setting.  
On with : OFF  
[Set Control 1]  
The control 1 output will remain off at all times.  
The control 1 output will remain on at all times.  
On with : ON  
[Set Control 1]  
On with : TIME  
[Set Control 1]  
The control 1 output will come on at the Start Day, Start Hour and Start  
Minute that is set in the three screens below.  
The Start Day can be set to ALL which will turn the output on every day  
at the set time. Pressing the UP or DOWN keys will change the setting.  
The output will remain on for the time set in "Duration". (see next page)  
Start Day : SUN  
[Set Control 1]  
Start Hour : 16  
[Set Control 1]  
Start Min : 30  
[Set Control 1]  
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(Inverter Cut out) The control 1 output will turn on when the inverter shuts  
down due to overload, over temperature or low or high voltage.  
The output will remain on for the time set in "Duration", below.  
The output will not come on if the front panel circuit beaker is tripped.  
On with : INV CO  
[Set Control 1]  
(Low Amp-Hours) If the charge in the batteries falls below the level set in  
the "Minimum Charge" setting (see page 13), then the control output will  
come on, for the time set in "Duration", below.  
On with : LO A/H  
[Set Control 1]  
On with : CO+LAH  
[Set Control 1]  
(Cutout or Low Amp-Hours) This setting combines the previous two, bring  
the output on with low amp hours, or with the inverter cutting out.  
The output will stay on for the time set in "Duration", below.  
Note that the controller can only be set to LO A/H and CO+LAH if the optional external current shunt  
kit (SA-S200) is used. Each controller output is capable of switching an external relay or contactor  
which can be used to switch AC or DC loads.  
If the controller is set to INV CO, LO A/H or CO+LAH and the condition still exists after the  
"Duration" time, the output will stay on until the condition ends. Also with these settings a "Lockout"  
LOCKOUT  
Lockout: ON  
[Set Control 1]  
If set to ON, lockout prevents the controller output coming on during the  
lockout period. (See notes on lockout on page 11.) Pressing the UP or  
DOWN keys will change the setting.  
DURATION  
This screen sets the duration hours the control 1 output will stay on.  
Pressing the UP or DOWN keys will change the setting.  
Duration : 4 Hrs  
[Set Control 1]  
This screen sets the duration minutes the control 1 output will stay on.  
Pressing the UP or DOWN keys will change the setting.  
Duration : 30 Min  
[Set Control 1]  
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BUZZER ON / OFF  
This display allows you to select whether the audio alarm sounds during an  
overload or other alarm conditions. If set to OFF the buzzer will not sound  
during an alarm condition. The alarm condition will still be displayed.  
Pressing the UP or DOWN keys will change the setting.  
Buzzer : ON  
[Set Parameters]  
BUZZER LOCKOUT  
Buzzer Lockout : OFF  
[Set Parameters]  
If set to ON, lockout prevents the buzzer from sounding during the lockout  
period. See lockout on page 11. Pressing the UP or DOWN keys will  
change the setting.  
MORE SETTINGS  
Any key to end  
or DOWN for more  
Pressing NEXT DISPLAY or UP keys will save the settings entered and go  
back to ‘Displays’. If the DOWN key is pressed, more settings will be  
displayed.  
SET DAY  
Sets the current Day. Use the UP and DOWN keys to set the value.  
Day : MON  
[Set Parameters]  
SET HOUR (TIME OF DAY)  
Set the hours in the current time of day (24 hour time). Use the UP or  
DOWN keys to set the value.  
Hour : 15  
[Set Parameters]  
SET MINUTE (TIME OF DAY)  
Sets the minutes in the current time of day. Use the UP or DOWN keys to  
set the value.  
Minute : 30  
[Set Parameters]  
DEMAND START SENSE  
DS Sense : 6W  
This sets the minimum load which will bring the SA41 ON when the  
[Set Parameters]  
inverter Status is set to STANDBY mode (demand start or pulsing). See  
page 5. In most cases the default setting of 6W would be suitable. If there is  
a load which the SA41 won't sense then reduce this value until the SA41  
starts. Alternatively if there is a small load that keeps the SA41 on then  
increase this value. You may need to try a few different settings to find the  
most appropriate value for your installation. Use the UP or DOWN keys to  
set the value.  
10  
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LOCKOUT  
Lockout is a feature which ensures that you are not disturbed during a specified period of time, e.g.  
you do not want to start a generator in the middle of the night. When set to ON, lockout prevents  
the controller outputs coming on, or the buzzer sounding during the lockout period.  
The lockout start and finish times below affect both controller lockout, and buzzer lockout. (See  
Buzzer Lockout on page 10.) Buzzer lockout and controller lockout may be set ON or OFF  
individually.  
SET LOCKOUT START TIME  
Lockout on : 22:00  
[Set Parameters]  
This is the time the lockout for the controllers and buzzer commences.  
After this time, the buzzer will not sound and the controlled outputs will not  
come on. If a control output is already on, lockout will not turn it off. Use  
the UP or DOWN keys to set the time.  
SET LOCKOUT FINISH TIME  
L’out off : 6:00  
This is the time the lockout for the controllers and buzzer ends. Use the UP  
[Set Parameters]  
or DOWN keys to set the time.  
LOW VOLTAGE TRIP  
When set to YES, the circuit breaker on the front panel will trip to  
completely disconnect the inverter from the batteries when the DC battery  
volts remains below the ‘Lo DC Volts’ setting (described below) for more  
than 2 minutes. Use the UP or DOWN keys to change the setting.  
Lo Volt Trip : YES  
[Set Parameters]  
LOW DC VOLTS CUTOUT  
The SA41 will cut out (not tripping the breaker) and a message displayed if  
Lo DC Volts : 40.0  
[Set Parameters]  
the battery voltage falls below this setting for more than 10 seconds,  
regardless of the setting of ‘Lo Volt Trip’. The inverter will restart if reset  
or when the battery volts rise above the ‘Lo DCV On’ setting (next  
setting).  
Please note that if the battery volts drop below 35V (regardless of the ‘Lo  
DC Volts’ setting) then the breaker will trip instantly, disconnecting the  
LOW DC VOLTS ON  
SA41 f  
th b
 
tt  
Lo DCV on : 48.0  
[Set Parameters]  
The SA41 will restart after a Low Battery Volts cut-out when the battery  
volts rise above this setting. Use the UP or DOWN keys to set the value.  
HIGH DC VOLTS CUTOUT  
When the battery volts exceeds this setting, the SA41 will cut out  
Hi DC Volts : 68.0  
[Set Parameters]  
instantaneously. Please note that if the battery volts rise above 70V  
(regardless of the ‘Hi DC Volts’ setting), the breaker will instantly trip and  
the inverter will be totally disconnected.  
11  
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AC VOLTS SETTING  
Allows the output voltage to be set from 220V to 240V if an output voltage  
other than 240V is required. Use the UP or DOWN keys to set the value.  
NZ users should set this to 220VAC.  
AC Volts : 240V  
[Set Parameters]  
ALARM INPUTS  
The ENERGY MANAGEMENT has 2 alarm inputs (shown on pages 25 and 26) which can be set to  
Use the ‘Lo’ setting if the input is connected to a normally closed set of contacts (see fig 2.1 on page  
Use the ‘Hi’ setting if the input is connected to a normally open set of contacts (see fig. 2.2 on page 26),  
or when the voltage rises above 3V on alarm (see fig. 2.3).  
ALARM INPUT 1  
Alarm 1 active : Hi  
[Set Parameters]  
Set alarm input 1 to HI or LO active. Use the UP or DOWN keys to change  
the setting.  
ALARM INPUT 2  
Alarm 2 active : Hi  
[Set Parameters]  
Set alarm input 2 to HI or LO active.  
EXTERNAL KEYPAD  
Ext. Keypad : YES  
[Set Parameters]  
This is set to YES if an optional external keypad (SA-KP-01) is connected.  
Otherwise this is set to NO. See page 27. Use the UP or DOWN keys to  
change the setting.  
CURRENT SHUNT SETTINGS  
EXTERNAL SHUNT  
Ext. Shunt : YES  
[Set Parameters]  
This is set to YES if an optional external current shunt (SA-S200) is  
connected. Otherwise this is set to NO. See page 28. Use the UP or DOWN  
keys to change the setting.  
If the current shunt is set to YES the following settings will be displayed.  
12  
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ZERO DC AMP READING  
This setting is used to zero the current reading from the external current  
Zero DC Amps : OFF  
[Set Parameters]  
shunt. See installation notes in Appendix III on page 28. Use the UP or  
DOWN keys to change the setting. Note: when this setting is set to ON, a  
zero DC amps is performed taking about 1 to 2 seconds, after which the  
display returns to OFF.  
BATTERY CAPACITY  
Capacity : 500AH  
[Set Parameters]  
This is the capacity of the batteries in ampere-hours at the system discharge  
rate. For example, a solar powered system will generally use the C/100  
(100 hour rate), but a diesel recharge system may use a discharge rate of  
C/20 (20 hour rate). Your system designer will advise you on this figure.  
Use the UP or DOWN keys to set your battery capacity.  
CHARGE IN BATTERY  
AH IN Batt : 445  
[Set Parameters]  
This setting is used at setup to enter the initial charge in the battery in  
Ampere Hours, or during use to bring the readings back in line. Use the UP  
or DOWN keys to set the value.  
MINIMUM CHARGE IN BATTERY  
If the charge in the battery bank drops below this level, an alarm will sound  
if the low charge alarm (the next setting) is set ON. Use the UP or DOWN  
keys to set the value.  
Min Charge : 60%  
[Set Parameters]  
LOW CHARGE ALARM  
If set to ON, an alarm will sound if the charge in the batteries drops below  
the Min Charge setting above. Use the UP or DOWN keys to change the  
setting.  
Lo Chg Alarm : OFF  
[Set Parameters]  
BATTERY CHARGE EFFICIENCY  
This setting is determined by the system design and the type and age of the  
Batt Effic. : 95%  
[Set Parameters]  
batteries used. If the battery efficiency is unknown, then we suggest that  
you use the default setting of 95% initially, and adjust if the ampere-hours  
in the batteries differs from the readings.  
END SETTINGS  
End Settings  
Press NEXT DISPLAY key to return to "Readings".  
[Set Parameters]  
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OVERLOAD SHUTDOWN AND ALARMS  
The SA41 has eight alarm and overload conditions. These result from high or low battery volts, high  
AC volts, AC output overloaded, transformer too hot, heatsink too hot, either of the two alarm inputs  
being active, or low battery charge. If any of these conditions occur, a message will be displayed. If  
there is more than one alarm condition the display will alternate between messages.  
The alarm message will remain on the display until a key is pressed, even if the alarm condition ends.  
(i.e. after a high voltage condition the battery volts comes back down again) This allows you to  
determine the cause of the shutdown even if the inverter comes on again before you are able to read the  
display. To reset the inverter after it has shutdown, set the inverter Status to RESET, and then back to  
DC VOLTS HIGH  
This message is displayed and the inverter shuts down if the battery voltage  
rises above the ‘Hi DC Volts’ setting. The inverter will automatically  
restart when the battery voltage drops below this value. The present battery  
voltage is also displayed.  
Hi DC Volts : 66.0  
* * Press a Key * *  
DC VOLTS LOW  
This message is displayed and the inverter shuts down if the battery voltage  
drops below the ‘Lo DC Volts’ setting for more than 10 seconds. The  
inverter will automatically come on again when the battery voltage rises  
above the ‘Lo DCV ON’ voltage or if the inverter is manually reset (via the  
STATUS display, see page 5). The present battery voltage is also displayed.  
Lo DC Volts : 38.0  
* * Press a Key * *  
AC VOLTS HIGH  
If a system fault causes the AC voltage to go too high, then this message is  
displayed.  
AC Volts Hi : 0  
* * Press a Key * *  
INVERTER OVERLOAD  
Inverter O/L : 0  
* * Press a Key * *  
An AC current overload or a short circuit on the AC output will cause the  
inverter to shut down and display this message. If the shutdown was due to  
an overload, the SA41 will automatically reset after 1 minute, or when a  
key is pressed. If the shutdown was due to a short circuit, the SA41 will  
have to be reset (via the STATUS display, see page 5) on the front panel.  
TRANSFORMER TOO HOT  
If the transformer reaches its maximum operating temperature, the SA41  
TX Too Hot : 122C  
* * Press a Key * *  
will shut down to protect the internal components. The SA41 will restart  
again only when the temperature drops to a safe level. The present  
temperature of the transformer is also displayed.  
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HEATSINK TOO HOT  
HS Too Hot : 82C  
* * Press a Key * *  
If the heatsink reaches its maximum operating temperature, the SA41 will  
shut down to protect itself. The SA41 will come on again only when the  
temperature drops to a safe level. The present temperature of the heatsink is  
also displayed.  
ALARM 1 ACTIVE  
Alarm 1 Active :  
* * Press a Key * *  
When the Alarm 1 input on the SA41 is activated, (see "Settings" on page  
12) this message is displayed and the buzzer sounds. The buzzer will  
continue to sound as long as the input is active.  
ALARM 2 ACTIVE  
When the Alarm 2 input on the SA41 is activated, (see "Settings" on page  
12) this message is displayed and the buzzer sounds. The buzzer will  
continue to sound as long as the input is active.  
Alarm 2 Active :  
* * Press a Key * *  
LOW CHARGE ALARM  
Lo Charge : 59%  
* * Press a Key * *  
If the battery charge drops below the ‘Min charge’ setting, and the ‘Lo  
Chg alarm’ setting is set to ‘ON’ then this alarm will sound. You are then  
able to take appropriate action such as removing loads or starting a  
generator to prevent further discharge and possible damage to your  
batteries.  
FAULT FINDING  
1. INVERTER STAYS ON EVEN WHEN NO APPLIANCE IS BEING USED.  
This can be a common problem known as a "phantom load", but can be easily overcome with  
ENERGY MANAGEMENT. Some appliances will need to be switched off at the power point as they  
may still represent a small load despite being switched off at the appliance. Check again to make sure  
there are no appliances left on, then sequentially switch off appliances at the wall and by watching your  
night light (as described in "Handy Hint" on page 19), check to see if the SA41 returns to pulsing  
mode (after a 10 second delay). Once you have found the offending appliance, adjust the sensitivity of  
the demand start up (see set parameters) until the inverter turns off. Once this is done re check that  
small loads will still bring the inverter on when required.  
2. INVERTER WILL NOT COME ON WHEN SMALL APPLIANCE IS SWITCHED ON.  
This means that your demand start sensitivity is set too high. With the appliance in question switched  
on, adjust the demand start sensitivity until your SA41 turns on. See Demand Start Sense on page 10.  
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3. INVERTER SHUTS DOWN DURING MIDDLE OF THE DAY, AND COMES BACK ON  
LATE IN THE AFTERNOON.  
This is more than likely caused by high battery volts during peak charging times from solar panels. To  
overcome this, adjust the high voltage cutout of your SA41 (see High DC Volts Cutout on page 11); the  
maximum voltage allowable being 34 Volts. If this is still not high enough you may have a problem  
with either your batteries or your regulator. This could be potentially dangerous so we advise you to  
consult your system designer immediately.  
4. INVERTER SHUTS DOWN WITH LOW VOLTS.  
If your SA41 has shut down because of low DC volts it could be due to the following:  
(1) A sustained large load could be causing the battery volts to drop to a low enough point to cause  
the SA41 to cut out. This is not normally a fault with the SA41 but could be due to the following:  
(a) Battery bank is too small - consult your system designer.  
(b) A bad connection between the batteries and inverter due to a loose or corroded terminal.  
In this case, please refer to the maintenance section of this manual.  
(c) One or more battery cells could be faulty - consult your installer.  
(2) If your battery volts are below 47V with no loads connected, the batteries may require charging.  
Use a hydrometer to check the specific gravity of each cell. Consult your battery manual for the  
correct specific gravity (SG) readings.  
5. INVERTER SHUTS DOWN DUE TO HEATSINK TOO HOT  
This is likely under heavy sustained load conditions since the SA41 shuts down to protect its internal  
components. If you believe that the load is not excessive, check around the inverter case and heatsinks  
for obstructions to air flow as this will cause the inverter to heat up much quicker and shut down sooner  
than normal. Also check that the clearances around the SA41 are as specified in INSTALLATION on  
6. “CHARGE IN BATTERY” APPEARS INCORRECT  
It is possible that this figure can accumulate errors, as battery charging / discharging is a very complex  
procedure with many variances; a hydrometer is always the most accurate method of determining a  
battery’s state of charge. If your system regulator is showing FLOAT then you should be able to  
presume your batteries are close to, or actually, 100% charged. You can confirm this with a  
hydrometer. If the “CHARGE IN BATTERY” figure is not reading correctly, adjust it by the method  
shown in page 13. If the figure is consistently too low, (e.g. 90% when the system shows FLOAT) you  
should increase the battery charge efficiency figure as described in page 13. Alternatively, if your  
system is not in float and the reading is already 100%, you should reduce the battery efficiency.  
7. INVERTER PULSES SLOWER THAN NORMAL WHEN IN STAND-BY  
This means that the inverter has not been switched on for approximately 20 minutes and has gone into a  
power saving mode, thus pulsing at about half the normal rate.  
8. “NETT AMP HOUR” APPEARS INCORRECT  
This could be caused by one or both of the following:  
(b) The “DC Amps” reading is not correct. Adjust this by zeroing the meter, see pages 13 and 28.  
16  
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SYSTEM MAINTENANCE  
To get the optimum performance from your SA41 power inverter, particularly under heavy appliance  
loads, it is essential that the battery bank and the DC wiring are all in good condition. The small amount  
of time spent on the suggested maintenance tasks that follow will maximise the reliability of your  
system.  
SA41 MAINTENANCE  
Periodic maintenance of the SA41 inverter involves little more than checking for unobstructed  
operation of the cooling fan, which is located at the rear of the inverter. Note that cooling air is drawn in  
through vents underneath the inverter.  
Suggested inverter maintenance should include:  
1. Check for unobstructed fan operation. Clear away any dust or foreign matter from the fan grill  
using a soft bristled brush. (Do not direct high pressure compressed air at the fan blades)  
Note that the fan is designed to come on during heavy power demand.  
2. Check between fins of the heatsinks and clean out any accumulated foreign objects, for example,  
insect nests.  
3. Verify that the air flow beneath the chassis is not restricted.  
4. Clean external surfaces of the SA41 using a soft, lint free cloth, with polish and wax. e.g. Mr.  
Sheen.  
BATTERY MAINTENANCE  
1. Every week, carry out a thorough visual inspection of all battery wiring, taking particular note of the  
condition of inter-connections between cells.  
IMPORTANT:  
When working on batteries of such high capacity, it is essential that you wear protective clothing,  
some form of eye protection and rubber-soled work boots. Please regard your batteries with a  
great deal of caution, and if in any doubt, entrust this work to your installer.  
2. Check that the stainless steel inter-connecting bolts are tight and have minimal corrosion. If  
corrosion is evident, carefully follow the following procedure.  
(a) Disconnect the system battery fuse before working on the battery bank.  
(b) Unbolt the stainless steel bolts and nuts of any corroded connections and thoroughly clean the  
join with a wire brush or file, taking extreme care not to short circuit any battery cells with any  
tools.  
(c) Re-assemble and smear a small amount of Vaseline or similar grease over the surface of the  
joint to slow down any future corrosion.  
3. Every month: measure the specific gravity (SG) of each cell using your hydrometer, to ensure that all  
cells are performing correctly. Any serious imbalance should be reported to your system designer in  
case remedial action needs to be taken.  
17  
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SA41 ELECTRICAL SPECIFICATIONS  
INVERTER TYPE PWM Full bridge power stage, with true sine wave AC output.  
DEMAND START SECTION  
Type:  
Pulsing AC  
3W to 20W  
1 sec  
Minimum Load Power to start (User adjustable):  
Maximum response time:  
Standby current from battery (Average):  
60mA  
BATTERY VOLTAGE RANGE  
Low DC Volts Disconnect (Instantaneous):  
34V  
Low DC Volts Cutout (Delayed, User Adjustable):  
Low DC Volts Cut-in (Delayed, User Adjustable):  
High DC Volts Cutout (Instantaneous, User Adjustable):  
High DC Volts Disconnect (Instantaneous):  
38-44V  
44.4-52V  
60-68V  
70V  
TOTAL APPLIANCE RATING AT  
25°C  
40°C  
Continuous:  
3000W  
4700W  
5300W  
6500W  
8500W  
2800W  
4400W  
30 Minute rating:  
5 Minute rating:  
1 Minute rating:  
Surge rating:  
INVERTER EFFICIENCY  
Peak (at 500W):  
91%  
No load power consumption (C0NT mode):  
0.66 A  
MISCELLANEOUS SPECIFICATIONS  
Output Frequency Accuracy:  
Output Voltage Accuracy (0 - 2200W)  
Total Harmonic Distortion (THD)  
50Hz ± 0.001 %  
240V ± 4 %  
< 4 %  
Control Outputs 1 & 2, max DC sinking current:  
Alarm Inputs 1 & 2, input switching level:  
50 mA  
HI > 3 V  
LO < 1 V  
-10°C to 50°C  
32 kg  
Operating temperature range:  
Weight:  
DC Input is Electrically Isolated from AC Output  
Note: Through a policy of continued development, specifications are subject to change without  
notice.  
The above specifications are based on unity power factor.  
18  
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RADIO FREQUENCY INTERFERENCE  
For many years, Radio Frequency Interference (RFI) has been an annoying problem for owners of  
Inverters. RFI in a domestic situation causes noise or interference on a radio or TV receiver. Most of  
the problems with RFI in a Remote Area Power Supply (RAPS) installation involve AM radio  
reception.  
Considerable development time has resulted in a reduction of the RFI produced by the SA41 to a level  
that complies with Australian Standard AS1044. Compliance to this standard means RFI is low but  
how well the inverter performs in a particular installation can vary. Below are some suggestions to help  
reduce the effects of RFI in your installation.  
It is recommended that the power system including the inverter is housed at least 15 metres from the  
home.  
Ensure a good earth stake is placed as close to the inverter as possible. See installation on page 3 for  
wiring.  
Avoid running DC wiring into the home, if at all possible. If this cannot be avoided, run DC and AC in  
separate conduits separated by as much distance as practicable. All DC wiring should also be kept as  
short as possible.  
To further reduce the effects of RFI, it is important that your AM radio has good signal strength. This  
will enable your radio to reject any noise being produced by your inverter, regulator, controllers or DC  
lighting. If possible, try moving the radio around to improve signal strength or use an external aerial.  
Some of today's building materials such as steel roofs and foil insulation may form a barrier to  
incoming radio signals. If an external aerial is required, it should be on the outside of the home,  
mounted as high as practicable and as far from the battery shed as possible. Connection from the aerial  
to the radio should be via a low loss coaxial cable.  
PLEASE NOTE:  
The aerial must be an AM RADIO type. A TV aerial will not work.  
HANDY HINT  
It is very important that you become familiar with the functioning of your inverter. Since most Inverters  
are remotely sited from the home, it is not always easy to know if the inverter is ON or pulsing. An easy  
way to determine this is to plug a small child's night light (neon type) into a power point which is easily  
visible, or replace the power point with a safety type with a neon indicator. This will indicate the  
inverter's operation by flashing when the inverter is pulsing and remaining on when the inverter is  
brought on by a load.  
19  
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APPENDIX I: DIAGNOSTICS  
The "Diagnostics" is a special set of displays that give additional information about the SA41. These  
are normally only used when advanced troubleshooting is undertaken. The "Diagnostics" section  
displays the transformer and heatsink temperature, demand start current and software version  
information.  
"Diagnostics" is accessed by holding both UP and DOWN buttons together twice, for at least 1 second  
each time, during the display of any "Readings" screen with the exception of "Status". The NEXT  
DISPLAY key takes you through the "Diagnostics" displays, eventually returning to the "Readings"  
display. See page 22 for more information.  
TRANSFORMER TEMPERATURE  
This display is the operating temperature of the transformer inside the SA41  
in degrees Celsius.  
TX Temp : 75C  
* * Diagnostics * *  
HEATSINK TEMPERATURE  
HS1 Temp : 34C  
* * Diagnostics * *  
This displays the operating temperature of the left heatsink.  
HS2 Temp : 34C  
* * Diagnostics * *  
This displays the operating temperature of the right heatsink.  
DEMAND START CURRENT  
D/S Current : 48  
This gives a reading of the value read by the demand start sense circuit and  
* * Diagnostics * *  
can be useful during advanced demand start troubleshooting.  
SOFTWARE VERSION  
This displays the revision of the software running your SA41.  
SELECTRONIC C  
SA41 1.00 1996  
Please note that this software is Copyright to SELECTRONIC  
AUSTRALIA P/L and it is an offence to copy or duplicate any part of this  
program. This is the last screen in the "Diagnostics" and pressing the NEXT  
DISPLAY key once more will return you to the readings.  
20  
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APPENDIX II: FLOW DIAGRAM FOR DISPLAYS AND SETTINGS  
READINGS  
Status: STANDBY  
Inverter: OFF  
MON: 15:06  
---Readings---  
AC Volts: 240V  
---Readings---  
AC Amps: 2.5A  
---Readings---  
Batt Volts: 49.2V  
---Readings---  
Current Shunt  
Not Installed  
Amps: 23.6A OUT  
---Battery---  
Pk Amps: 45.6 IN  
---Battery---  
Net AH: 69 IN  
---Today---  
Charge: 87%  
--In Battery--  
21  
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MINIMUM CHARGE DISPLAY  
Access to the next 5 screens is from the “Readings” screen.  
Hold the “Down” and “Up” keys simultaneously for approximately 1 second, then release the keys.  
Min Charge: 67%  
In Batt Today  
Min Charge: 67%  
In Batt This Wk  
Weeks go: 1  
Min Charge: 76%  
Days ago: 1  
Min Charge: 76%  
End Min Charge  
Back to "Readings"  
SWITCHING BETWEEN READINGS, MINIMUM CHARGE, AND DIAGNOSTICS  
Readings  
Press UP and Down together  
for 1 second  
Minimum charge  
displays  
Pressing NEXT DISPLAY  
will return to Readings  
Press UP and Down together  
for 1 second  
Diagnostic  
Displays  
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SETTINGS  
Access is from “Readings” screen.  
Hold down “Next Display” key for approximately 1 second.  
ON or OFF  
On with: TIME  
[Set Control 1]  
INV CO, LO A/H or  
CO+LAH  
Start Day: SUN  
[Set Control 1]  
Start Hour: 16  
[Set Control 1]  
Start Min: 30  
[Set Control 1]  
Lockout: ON  
[Set Control 1]  
Duration: 4 Hrs  
[Set Control 1]  
Duration: 30 Min  
[Set Control 1]  
CONTROL OUTPUT 2  
SET AS FOR OUTPUT 1  
Buzzer: ON  
[Set Parameters]  
Buzz Lockout: OFF  
[Set Parameters]  
DS Sense: 6W  
[Set Parameters]  
Back to  
"Readings"  
if DOWN  
Any key to end  
or DOWN for more  
not pressed.  
Day: MON  
[Set Parameters]  
Hour: 15  
[Set Parameters]  
Minute: 30  
[Set Parameters]  
Continue on to next page  
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From previous page  
Lockout on: 22:00  
[Set Parameters]  
L'out off: 6:00  
[Set Parameters]  
Lo Volt Trip: YES  
[Set Parameters]  
Lo DC Volts: 40.0  
[Set Parameters]  
Zero DC Amps:OFF  
[Set Parameters]  
Lo DCV on: 48.0  
[Set Parameters]  
Capacity: 500AH  
[Set Parameters]  
Hi DC Volts: 68.0  
[Set Parameters]  
AH In Batt: 445  
[Set Parameters]  
AC Volts: 240V  
[Set Parameters]  
Min Charge: 60%  
[Set Parameters]  
Alarm1 active:HI  
[Set Parameters]  
Lo Chg Alarm:OFF  
[Set Parameters]  
Alarm2 active:HI  
[Set Parameters]  
Batt Effic.:95%  
[Set Parameters]  
Ext. Keypad: YES  
[Set Parameters]  
End Settings  
[Set Parameters]  
Ext. Shunt: YES  
[Set Parameters]  
YES  
Back to "Readings"  
Back to "Readings"  
if no Current Shunt  
24  
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APPENDIX III: SA INVERTER OPTIONS  
GENERAL  
The SA41 employs a rear chassis-mounted 25-pin connector, which allows you to add a selection of  
optional features to your power system. Note that the software for these functions is already  
installed within the SA41 microcontroller.  
The full range of features are:  
(a) Remote Keypad:  
A low profile keypad with 2-line Liquid Crystal Display, which can  
be located up to 500 metres from your SA41.  
Wiring requirements - 6 conductor shielded cable.  
(b) DC Current Shunt: Consists of a 200 Amp 75mV current shunt, mounted on an insulated  
base, and a twin flex loom for current sensing.  
(c) Controller Outputs: Two external relay or contactor coils can be energised for various AC  
or DC switching applications.  
(d) Alarm Inputs:  
Two digital inputs that can be programmed to monitor switch contact  
status or voltage levels (refer to following circuits for examples)  
SA-SB-01 INTERFACE KIT  
The Interface Kit SA-SB-01 plugs into the rear of the SA41 and provides a convenient termination  
point for the various options outlined above. The screw terminals are numbered from 1 to 14 and  
the connections are as follows:  
TERMINAL NO  
DESCRIPTION  
1 & 14  
2
+48V with 1A internal fuse  
Alarm input 2  
3
Alarm input 1  
4
0V  
5 - 8  
9
Keypad data lines  
Keypad +12V  
10 & 11  
12  
13  
200A current shunt connections  
Controller output 2  
Controller output 1  
Please refer also to Diagram 1 overleaf.  
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SA-SB-01 INTERFACE CONNECTIONS  
REAR VIEW  
+48V  
FOR ALARM INPUT  
APPLICATIONS,  
REFER BELOW EXAMPLES  
SA-KP-01  
KEYPAD  
SA-SB-01  
INTERFACE BOARD  
TOP VIEW  
RELAY-SPDT  
RELAY-SPDT  
+48V (INT FUSE)  
1
2
IN 2  
ALARM INPUTS  
3
IN 1  
BLK  
RED  
0V  
4
1
2
3
4
GRN  
BLU  
BLK  
YELL  
WH  
5
6
7
8
9
DO-  
D0+  
WH  
RIN-  
YELL  
BLU  
GRN  
RIN+  
5
RED  
+12V  
6
SHIELD  
10  
11  
INV-  
BATT-  
50mA MAX  
50mA MAX  
12  
13  
14  
OUT 2  
OUT 1  
+48V  
CONTROLLER  
OUTPUTS  
1A FUSE INSIDE INVERTER  
TO INVERTER POSITIVE  
-
+
INVERTER -  
CHARGER -  
FUSE BATTERY NEGATIVE  
IF IT IS NOT EARTHED  
SYSTEM  
FUSE  
48V  
BATTERY  
SA-S200  
200 AMP 75mV  
CURRENT SHUNT  
ALL CHARGING  
AND DISCHARGING  
SOURCES, NEG LEAD  
GROUND  
Figure 1  
ALARM INPUTS - Examples  
(Alarm input 1 shown only)  
ALARM FITTED TO BATTERY ROOM DOOR  
REED SWITCH  
(NORMALLY CLOSED)  
NORMALLY OPEN  
+48V  
IN2  
+48V  
IN2  
1
2
3
1
2
3
IN1  
IN1  
SET ALARM INPUT 1 = LO  
SET ALARM INPUT 1 = HI  
Figure 2.1  
Figure 2.2  
Figure 2  
MONITORING OF SWITCH CLOSURE  
GENERATOR OIL PRESSURE MONITOR  
WHERE ONE SIDE COMMITTED TO EARTH  
+48V  
1
+48V  
IN2  
1
2
3
LAMP  
4.7K 2W  
IN2  
IN1  
2
3
IN1  
OIL  
PRESS  
SWITCH  
0V  
4
0V  
4
SET ALARM INPUT 1 = HI  
SET ALARM INPUT 1 = LO  
Figure 2.3  
Figure 2.4  
26  
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INSTALLATION OF SA-KP-01 OPTIONAL KEYPAD  
Installation of the optional keypad requires the interface board (SA-SB-01) plus a suitable  
length of 6 conductor (3 pair) shielded 7 / 0.2 data cable.  
1. Carefully unpack the Keypad Kit. The front cover has been left loose to  
allow access to the 4 mounting holes as shown.  
2. Prior to attaching the keypad to the wall, bulkhead, etc., complete the electrical connections to  
the user screw connector as shown in Diagram 1 on page 26. Please take careful note of the  
orientation. Plug the screw connector into the back of the keypad and secure the keypad chassis  
in its intended location  
3. Clip the grey plastic front cover over the chassis, applying firm  
pressure at the points shown at right.  
4. At the SA41 end of the shielded cable, connect the 6 wires to the SA-SB-01 Interface Board,  
using screw terminals 4 to 9, as shown in Diagram 1. Connect the cable shield to the 0V terminal  
(No. 4, Black) to reduce radiated electrical noise from the cable.  
5. Ensure that the SA41 is switched off at the front panel circuit breaker.  
6. Plug the SA-SB-01 Interface Board into the rear DB25 connector of the SA41.  
7. Switch on the SA41 at the circuit breaker. The keypad will not display any information at this  
stage.  
8. Via the SA41 front panel, access the “Settings” menu as described in Page 8 of the manual.  
Scroll slowly through the screens until the following display is seen:  
Ext. Keypad: NO  
[Set Parameters]  
Select YES using the ”UP” key. Scroll through the remainder of the “Settings” screens until the  
“Readings” screen is reached.  
9. The external keypad will now display the same information as appears on the SA41 front panel.  
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INSTALLATION OF SA-S200 OPTIONAL CURRENT SHUNT  
Installation of the current shunt requires the SA-SB-01 interface board.  
1. The 200 Amp 75mV precision current shunt must be fitted between the negative (black) lead of  
the SA41 and battery negative, as shown on diagram 1. Please ensure that cables are kept as  
short as possible. At least 120 Amp continuously rated battery cable should be used.  
2. Attach the shunt and insulated base securely to a solid structure.  
3. Using the twin flex supplied, wire up the current sensing wires to the SA-SB-01 Interface Board  
as shown in Diagram 1, terminals 10 and 11 being used for the current sensing. Take careful  
note of the polarity.  
4. Ensure that the SA41 Status is in "RESET" mode, which ensures that the SA41 is not drawing  
any DC current through the shunt. Also, disable all charging sources, such as Solar Panels and  
wind generators.  
5. Via the SA41 front panel, access the “Settings” menu as described on Page 8 of the manual.  
Scroll slowly through the screens until the following display is seen:  
Ext. Shunt: NO  
Set Parameters]  
Select YES using the ”UP” key.  
6. Scroll to the next screen and the following display will be seen:  
Zero DC Amps: OFF  
[Set Parameters]  
Select ON using the ”UP” key. Note: when this setting is set to ON, a zero DC amps is performed  
taking about 1 to 2 seconds, after which the display returns to OFF.  
Scroll through the remainder of the “Settings” screens until the “Readings” screen is reached.  
7. Scroll through the “Readings” screen until the following screen is displayed:  
Note that when the battery current is zero, the screen may flicker between IN and OUT; this is  
quite normal.  
Amps: 0.0A OUT  
----Battery----  
8. Apply an AC load to the inverter's output and verify that the DC current reading is "OUT".  
If not, then reverse the sensing wires to the current shunt.  
28  
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WARNING  
THE OUTPUT VOLTAGE FROM AN INVERTER IS AS LETHAL AS  
LANDLINE POWER.  
It is therefore absolutely necessary for your safety to ensure that all Remote Area  
power installations meet and comply with the relevant provisions and requirements of  
wiring standards.  
It is imperative that you ensure that only Electrical contractors are permitted to install  
any AC wiring in your system.  
PRODUCT WARRANTY CONDITIONS  
Selectronic Australia Pty Ltd warrants your SA41 inverter to be free from defects in  
materials and workmanship under normal use and service, for two (2) years.  
This warranty is applicable from the date of original purchase. All parts will be  
replaced or repaired free of charge within this period. Travelling time for field service  
personnel is not covered under this warranty. The unit shall be returned at no cost to  
the owner, if no authorised field service personnel are available.  
After you have completed our post-installation questionnaire, you will receive a  
lifetime warranty, applicable to the original purchaser only.  
The provision of this warranty shall not apply if the unit has been subject to misuse,  
neglect, accidental damage, damage from external influences e.g. corrosion, used for a  
purpose it is not intended, acts of God or has not been installed in accordance with the  
manufacturers latest installation requirements. (Any installation updates will be mailed  
to your last known address.) Lifetime warranty is dependant on the supply of raw  
materials from suppliers, above and beyond Selectronic Australia’s legal obligation.  
Freight charges to the point of purchase and the cost of any repairs resulting from  
damages occurring during this freighting will be borne by the owner.  
Any alterations or repairs by unauthorised parties will void your warranty.  
To ensure fast efficient handling of any warranty claims, please complete and return  
your reply paid warranty card within 30 days from date of purchase. If service is  
required, please return your inverter in its original carton with proof of purchase and a  
brief description of the fault, to your point of service or any of the following service  
centres:  
Selectronic Australia Burley TV Service  
Reid Technology Ltd RF Analysis  
278 Edmondson Ave 3-5 Auburn Street Harness Cask Road  
Dorrigo  
25 Holloway Drive  
Bayswater  
Austral  
Takapuna  
Victoria  
Australia  
3153  
NSW 2171  
Australia  
North Shore City  
NSW 2453  
Australia  
Auckland  
NZ  
Ph: 03 9762 4822  
Fax: 03 9762 9646  
Ph: 02 606-0279  
Ph: 9 489-8100  
Fax: 9 489-8585  
Ph: 066 57 8003  
Fax: 066 57 8002  
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MOUNTING TEMPLATE FOR SA-KP-01 KEYPAD  
Use this template when marking and cutting holes in plasterboard, etc., for the SA-KP-01 keypad.  
30  
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