Honda EM50is Owner's Manual page 22

i-Monitor Display Mode 4–Battery Voltage
This mode displays the battery condition, expressed in Volts DC.
i-Monitor Low Battery Message
If the engine switch is turned to the START position and ''batt'' is
shown on the i-Monitor display, the battery voltage is too low to
operate the engine's electric starter. Use the recoil starter to start the
generator. Have the battery recharged and checked (see pages 51 thru.
53).
i-Monitor System Error Messages
If the generator has a system malfunction, it will show an error
message on the i-Monitor display. If an error message displays, contact
an authorized Honda generator dealer.
(FT, GT, ITT types)
20
OVERLOAD INDICATOR
ERROR MESSAGE
(Example: E-01)
(UT, RT types)