Generac — Functional Tests & Adjustments
Testing & diagnosis · Transfer Switch
From a Generac service manual — check it applies to your exact model before use.
Browse Generac generators & specs →
Procedure
- Verify utility supply to transfer mechanism is ON
- Verify transfer mechanism is in utility position
- Prepare standby generator for automatic operation
- Turn utility supply circuit breaker to OFF position
- Verify generator starts after line interrupt delay
- Verify transfer mechanism rotates correctly
- Turn utility supply circuit breaker to ON position
- Verify return to utility operation after time delay
- Confirm system ready for automatic operation
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Frequency: 60-62 Hertz
- Generator supply voltage: 240-246 VAC
- Voltage to neutral: 120-123 VAC
- Maximum load voltage: 115-125 VAC
Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.