Tel: (888) 552-6467
Fax: (800) 316-4515
www.tnb.com
06/18 750.1781_Rev. H
10/12
300/600W Mini Inverter
TROUBLESHOOTING GUIDE (PAGE 1 OF 2)
STATUS INDICATOR
(LED)
TROUBLESHOOTING GUIDE
DISPLAY
DETAIL
SYMPTOMS
PROBLEM
CORRECTIVE ACTION
LED GREEN
ON Steady,
not flashing
Lamp load is on
None if unit is in normally on mode Unit is operating correctly
Lamp load is off
None if unit is in normally off mode Unit is operating correctly
Lamp load is OFF, but
the unit is in normally
on mode
The fuses are burnt
Replace the fuses after verifying that there is no
short circuit in the load
-Lamp load is OFF
(if installation is
normally OFF)
- Lamp load is ON
(if installation is
normally ON)
Power at primary AC input +
battery discharged (at LVD) + no
reaction with test button
- Remove the primary AC input + disconnect the
b wait minimum 10 seconds
- connect the b connect the primary AC input
=> the unit will restart
- if the unit did not r call the technical support.
LED flashing
GREEN/
ORANGE
Lamp load is ON
None if unit is in normally on mode
+Nexus option
Unit is operating correctly. Unit is not commissioned
to the Nexus system
Lamp load is OFF
None if unit is in normally off mode
+Nexus option
Unit is operating correctly. Unit is not commissioned
to the Nexus system
LED flashing
GREEN/OFF
Lamp load is ON
None the unit is in test mode or is
sampling load
Unit is operating correctly
Lamp load is OFF
Inverter switched OFF
Check the inverter ON/OFF switch => Turn it on.
Switch is located on the right side of the inverter
module.
The output fuse is burnt
Replace the fuses after verifying that there is no
short circuit in the load
LED steady
OFF, not
flashing
Lamp load is ON
No power at primary AC input + in
emergency mode
Check the circuit breaker panel
Lamp load is OFF
No power at primary AC input +
emergency mode stop (battery
discharged)
Check the circuit breaker panel
- Lamp load is OFF
(if installation is
normally OFF)
- Lamp load is ON
(if installation is
normally ON)
Power at primary AC input +
battery discharged (at LVD) + no
reaction with test button
- Remove the primary AC input + disconnect the
b wait minimum 10 seconds
- connect the b connect the primary AC input
=> the unit will restart
- if the unit did not restart, call for technical support at
1-(888)-552-6467.
LED RED
steady ON
Battery Disconnect
Error
No battery installed in the unit
Install the battery following the installation guide
