Product Manual

- 26 -
Symptom
Possible Cause
Recommended Solution
Inverter will not turn on during
initial power up.
Batteries are not connected, loose
battery-side connections.
Low battery voltage.
Check the batteries and cable
connections. Check DC fuse and
breaker.
Charge the battery.
No AC output voltage and no
indicator lights ON.
Inverter has been manually
transitioned to OFF mode.
Press the switch to power saver on
or power saver off position.
AC output voltage is low and the
inverter turns loads OFF in a short
time.
Low battery.
Check the condition of the
batteries and recharge if possible.
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 there may be instances of the transformer and/or case vibrates and makes noise. If
the noise comes from transformer, it is a half wave load. A half wave load 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). If this happens, the
frequency of noise falls exactly into the range (200Hz-20KHz) that human ears can hear.
The most common occurrence is with a hair drier. If the noise comes from the case,
the inverter is loaded with an inductive load. The magnetic field generated by the transformer keeps
attracting or releasing the steel case at a specific frequency and 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.