Samlex America SAM-450-12E - Manual (Page 13)

12 | SAMLEX AMERICA INC. SAMLEX AMERICA INC. | 13
Issue: no Ac output - Green LeD is on, Red LeD is on, Yellow LeD is oFF
and Buzzer is oFF
PoSSiBLe cAUSeS:
1. Inverter has shut down due to internal short circuit / overload
2. Inverter has shut down due to short circuit / overload in the AC load connected to the inverter
3. Inverter has shut down due to leakage in the AC Load
SUGGeSteD ReMeDieS:
•
Switch off and disconnect the load
• The unit will be latched in shutdown condition and will require manual reset. Switch off the
on / off switch and wait for 3 minutes. Switch on the on / off switch to reset the unit
IF Cause #1:
•
If the unit shows the same symptoms on no load, the unit is defective. Call Tech Support
IF Cause #2:
•
Check that there is no short circuit in the AC load and that the rating of the load is not > 450
W continuous or > 900 W surge.
• Power a different good load of up to 450 W and confirm that the unit does not shut down
IF Cause #3:
•
Power a different good load of up to 450 W and confirm that the unit does not shut down
• Check that there is no leakage in the load that created shut down. Leakage will occur if
there is a direct short or electrical path from live, current carrying section in the load to the
chassis of the load. remove faulty load.
Issue: Ac output is Available - Green LeD is on, Red LeD is oFF, Yellow LeD is oFF,
Buzzer is on
PoSSiBLe cAUSe: Low DC input voltage alarm due to DC input voltage < 10.5 VDC. Will automati-
cally reset when > 10.5 VDC.
SUGGeSteD ReMeDieS:
•
Low battery terminal voltage. recharge the battery. If battery voltage does not rise to fully
charged voltage even after long charging time. replace the battery
• Excessive drop in DC input wires due to thin DC input wires. Check firmness of connections
and increase wire size
• If the battery terminals read higher voltage at no load but the terminal voltage drops ap-
preciably when the load is turned on, the battery may have sulfated due to undercharging.
Equalize the battery (only flooded or wet cell types).
Issue: Some loads do not power up properly.
PoSSiBLe cAUSeS: If these are connected permanently to the inverter, are in oN condition always
and these are switched oN and off using the on / off Switch of the inverter. Extremely high reac-
tive inrush currents during the voltage ramp up of soft start phase on switching on of the inverter
drives the inverter into hiccup and subsequent overload.
SUGGeSteD ReMeDieS:
•
Always switch on the inverter first and then the AC load.
• In order to reduce the inrush current, add a small resistive load like incandescent lamp and
this may allow normal startup
Issue: Ac output voltage reads low ( 192 to 208 VAc) when measured with
an ordinary voltmeter
PoSSiBLe cAUSe:
The voltmeter being used is not designed to read the true rMS value of modified sine wave-form
SUGGeSteD ReMeDY:
• Use a voltmeter which is designed to measure “true rMS values” like fluke 87,
fluke 8060A, etc.