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time.
Charger is inoperative and unit
will not accept AC.
AC voltage has dropped
out-of-tolerance
Check the AC voltage for proper
voltage and frequency.
Charger is supplying a lower
charge rate.
Charger controls are improperly
set.
Low AC input voltage.
Loose battery or AC input
connections.
Refer to the section on adjusting
the “Charger Rate”.
Source qualified AC power..
Check all DC /AC connections.
Charger turns OFF while charging
from a generator.
High AC input voltages from the
generator.
Load the generator down with a
heavy load.
Turn the generator output voltage
down.
Sensitive loads turn off
temporarily when transferring
between grid and inverting.
Inverter's Low voltage trip voltage
may be too low to sustain
certain loads.
Choose narrow AC voltage in the
DIP switch, or Install a UPS if
possible.
Noise from Transformer/case* Applying specific loads such as
hair drier
Remove the loads
*The reason for the noise from transformer and/or case
When in inverter mode sometimes the transformer and/or case of the inverter may vibrate and make noise.
If the noise comes from transformer:
According to the characteristics of our inverter, there is one type of load which most likely may cause rattles
of transformer.
That is a half wave load: A load that uses only half a cycle of the power. This tends to cause an imbalance of
the magnetic field of the transformer, reducing its rated working freq from 20KHz to, say, maybe 15KHz (it
varies according to different loads). In such a case the frequency of noise falls exactly into the range
(200Hz-20KHz) that human ears can hear.
The most common load of such kind is a hair drier.
If the noise comes from the case:
Normally when loaded with inductive loads, the magnetic field generated by the transformer keeps attracting
or releasing the steel case at a specific freq, this may also cause noise.
Reducing the load power or using an inverter with bigger capacity will normally solve this problem.
The noise will not do any harm to the inverter or the loads.
5 Warranty
We offer a 1 year limited warranty.
The following cases are not covered under warranty.
1 DC polarity reverse.
The inverter is designed without DC polarity reverse protection. A polarity reverse may severely damage the
inverter.
2 Wrong AC wiring
3 Operation in a moist environment.
4 Operating with an undersized generator or generator with unqualified wave form.
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