Toro Groundmaster Series Service Manual page 40

Note: If "Unknown Cause" appears as an advisory description, a controller
software issue may exist. If you are unable to clear this type of advisory, contact
an Authorized Toro Distributor.
Troubleshooting: Cutting Unit (or attachment) Problems Page 3–4 Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A