Installation Guide
12
5.0 Protections
5.1 Low Voltage Disconnect (LVD) – The SureSine will disconnect AC Output
when the battery discharges below the LVD setpoint (after a four minute
delay). AC Output will resume when the battery has recharged to Low Voltage
Reconnect (LVR) setpoint. The LVD/LVR thresholds are adjustable using DIP
switch 2. See the Installation, Step 2 section for details.
Audible LVD Warnings:
The SureSine will beep four (4) times when the battery discharges to the LVD
Warning threshold voltage. The SureSine will beep twice when Low Voltage
Disconnect occurs. The LVD Warning occurs 0.3V above the selected LVD
threshold.
5.2 High Voltage Disconnect (HVD) – The SureSine will shut down and
disconnect AC Output if battery voltage exceeds 15.5V. Automatic
reconnection when battery voltage decreases to 14.5V.
5.3 High Temperature Disconnect (HTD) – If the SureSine heatsink
temperature rises above 95°C, an HTD fault will occur and the
SureSine will disconnect the AC Output. Normal operation will automatically
resume when the heatsink cools to 80°C.
5.4 Over-current Protection – Full electronic protection against AC overloads.
Fully automatic reconnect after 10 seconds.
5.5 Short Circuit – Full protection against short circuits on AC Output. Three (3)
automatic retries every 10 seconds. If a short circuit still persists after three
(3) retries, the fault must be manually cleared in one of the following ways:
1. Turn the remote switch off, then on (or disconnect/reconnect jumper)
2. Disconnect, then reconnect battery power.
5.6 Reverse Polarity – Protected by fuses against reverse battery connection.
Fuses must be replaced to resume normal operation. (see section 6.3 for fuse
replacement instructions)