Mower Not Charging

Step 1 – If mower refuses to go to the base station and dock after mowing, carry it manually to the base station, dock it manually and let it charge. It may take up to 24 hours if mower had been in use for an extended time period and battery voltage is low.

Step 2 – Does the mower go out to mow automatically?

If Yes – Battery was charged, and this was an isolated incident.

If No – Proceed to Step 3.

Step 3 – Send the mower to mow manually when it is on the base station. Does it go out to mow?

If Yes – Check your settings to determine why it didn’t go out automatically.

If No – Proceed to Step 4.

Step 4 – When you tried to send it to mow manually, did it display the “Recharge Battery” message again?

If Yes – Check to see if the base station light is green when mower is on it. If it is, pull the mower back half an inch to reveal the dock charging prongs, but keep charging and check base station prongs voltage with a voltmeter on DC scale. It should be around 33-34 VDC.

Is the charging voltage ok?

If Yes – Proceed to Step 5.

If No – Proceed to Step 6.

Step 5 – Check the battery voltage and each cell voltage, which can be done on the mower’s menu at Service ⇢ 897 code ⇢ Information ⇢ Special Displays ⇢ Battery. Remember, voltage is shown in millivolts so 24 volts will show as 2400. Also inspect each battery cell voltage. Healthy battery cells are around 3-3.6 volts which will show as 300-360 in this special display. Make sure the cells are relatively even. If one cell is below 200 millivolts or 2 volts this battery is no longer good. See illustration for battery special display screen.

Is the battery voltage above 16 VDC and are all cells above 2 VDC?

If Yes – Continue charging.

If NoReplace the Battery.

Step 6 – If the charging voltage was found less than the 33-34 VDC needed for prompt charging, start the charging chain elimination process to find and replace the faulty component.

Step 7 – Connect the power supply directly to the base station head and see if the base station head prongs supply the needed 33-34 VDC (Reminder: do this while the mower is in charging.)

If Yes – Replace the 65ft (20m) extension cord.

If No – Proceed to Step 8.

Step 8 – Replace the Power Supply and make sure the base station head prongs supply the needed 33-34 VDC (Reminder: while the mower is in charging, be sure to pull it out half an inch and use a voltmeter on its exposed prongs while still charging the mower.)

If Yes – Problem solved. Charge the mower and let it continue to work automatically.

If No – Proceed to Step 9.

Step 9 – Replace the Base Station Head and see if base station head prongs supply the needed 33-34 VDC (Reminder: do this while the mower is in charging.)

If Yes – Problem solved. Charge the mower and let it continue to work automatically.

NOTE: Reconnect and use original Power Supply and 65ft (20m) extension cord.