Honda HRM300 Manual page 124

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"Battery voltage high" MESSAGE
HRM300/500 is connected to the station.
No
Check the battery voltage on the display with
docking to the station or using Dr.H.
Normal
Main ECU trouble.
Replace the main ECU (page 10-7).
"Battery voltage low" MESSAGE
Charge HRM300/500 at the station.
Cannot charge
Check for continuity between the main ECU 2P
connector and charge socket terminals
( and ) of sub wire harness.
·2P connector No.1 terminal (Green)
- (Green) terminal
·2P connector No.2 terminal (Blue)
- (Blue) terminal
Abnormal
Replace or repair the sub wire harness.
Yes
Abnormal
Abnormal
Can charge
Normal
Temporary failure.
Normal
TROUBLESHOOTING
Disconnect the mower from the docking
station.
Turn ON the power supply and leave it for an
hour.
Recheck the warning message in the display.
Temporary failure.
Battery trouble.
Replace the battery (page 10-7).
Recheck the warning message in the display.
Check the battery voltage on the display with
docking to the station or using Dr.H.
Normal
Battery trouble.
Replace the battery (page 10-7).
Main ECU trouble.
Replace the main ECU (page 10-7).
Normal
Abnormal
Abnormal
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