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7
MAINTENANCE & SERVICE
6
TROUBLESHOOTING GUIDE
7
Maintaining Your
Inverter
Your CPI 300 requires very
little maintenance to keep it
operating properly. The exterior
of the unit should be cleaned
periodically with a damp cloth
to prevent accumulation of
dust and dirt. At the same
time, tighten the screws on
the DC input terminals. Keep
vents and fans free from dust
or debris.
Service
You can receive technical
assistance with your unit
through one of our customer
support services:
• Automated Help Desk
is available 24 hours a day,
7 days a week at
773-889-3087.
• Customer Service Operators
are available at
773-889-3087 Monday
through Friday, 8:00 a.m. to
6:00 p.m. CST.
• Questions can be faxed to
773-622-2269.
• Automated Technical
Assistance is available
24 hours, 7 days a week
via e-mail at:
productinfo@cobra.com.
• On-line answers to
frequently asked questions
can be found at:
www.cobra.com
8
Problem/ Possible Solution
Symptom Causes
Low output voltage Overload Reduce the load.
No output voltage Low input Recharge battery.
voltage Check connections
and cable.
Short circuit or Check AC wiring for short
wiring error circuit or improper polarity.
No output voltage High input Make sure the inverter
and ”fault“ voltage is connected to a
indicator is lit 12 volt battery.
Check regulation of
charging system.
No output voltage Thermal Allow inverter to cool down
when load is in shutdown Improve ventilation—
excess of 300 watts make sure ventilation
or 2.6 amperes openings in the inverter
aren’t obstructed. Lower
ambient temperature.
Low battery Poor DC wiring, Use proper cable.
alarm sounds poor battery Ensure good connections.
continuously connection Use new battery.