Yamaha PASC4 Owner's Manual page 114

Symptom
(Display A2)
displayed alternately, and an error code is
indicated in the function display.
(Display B)
shown alternately, and an error message
relating to the battery pack error will be
shown on the function display.
(Display C)
Error messages relating to Battery Pack
errors are displayed here as
underneath.
(Interface X)
The battery capacity indicator goes off,
and all lamps of the assist mode indicator
flash in red or 2 indicator segments of the
assist mode indicator flash.
R R R R
R R
Red
R
No light
Check
together
110
Action
The problem occurs in the
Battery Pack. Turn off the
power and then turn it on
again. If the problem
cannot be solved, have
your Battery Pack
inspected by a dealer as
soon as possible.