3 Check and start operation
3-4 Interpreting beeps and displays
Note 1: In bypass operation, commercial power is output directly. Output stops when a power failure
(AC input OFF) occurs in bypass operation.
Note 2: The displays and operations vary according to the status.
Note 3: Devices such as dryers, some solenoid valves, etc., which have a half-wave rectifier.
(2) When "Power" switch is "OFF"
No.
Status
indicator
Power
supply
output
(Same as above.)
3-4-5 Display and beep for battery replacement
37
Intermittent
2.0-second
intervals
ON
The self-diagnosis test
detected a weak battery
(warning only, output
continues).
Replace the battery.
You can replace the
weak battery with a
separately purchased
replacement battery as
needed.
See also “4-2 Replacing
the battery”.
38
Intermittent
2-second
intervals
ON
Battery life counter went
off-scale. (Warning only.
Outputs continue.)
39
--- --- ---
None OFF
Battery life counter has
been reset.
Be sure to reset the
battery life counter after
replacing the battery.
See also “4-2
Replacing