18
5. Trouble Shooting
Status
LED Indicator
Buzzer states
Status
Solution
Green
Slow Blink
Two Short
Over Temperature
Protection (OTP)
1. Improve ventilation. Make sure
ventilation openings in inverter are not
obstructed.
2. Reduce ambient temperature.
Fast Blink
One Short
Under
Temperature
Protection (UTP)
1. Increase ambient temperature.
Orange
Slow Blink
N/A
Grid Over / Under
Voltage Protection
1. Make sure AC input is within 90Vac ~
132Vac (110V system) or
180Vac~264Vac (220V system).
Fast Blink
N/A
Grid Over Current
Protect
1. Turn off the load and make sure there
is no short circuit inside the load circuit.
2. Check the setup value of AC input
current limit (Dip Switch S4,S5,S6).
3. Re-turn on the unit manually.
Solid
N/A
Phase or
Frequency Failure
1. Make sure AC input frequency
matches the Unit output frequency.
Red
Slow Blink
Four Short
Battery Under
Voltage Protection
1. Check DC input voltage. Increase DC
input voltage.
2. Check DC input connection and wring
cable.
3. Recharge battery.
Fast Blink
Three Short
Battery Over
Voltage Protection
1. Check DC input voltage. Reduce DC
input voltage.
Solid
Five Short
Over Load
(101%~115%)
Protection
1. Reduce load in case of restart failed.
2. Re-turn on the unit manually.
N/A
Over Load
(>115%) /
Short Circuit
Protection
Vanner Incorporated
4282 Reynolds Drive
Hilliard, Ohio 43026
Ph: 800-AC POWER
Ph: 614-771-2718
Fax: 614-771-4904
www.vanner.com
Manual P/N: D920563-A
October 2021
