Generac — Voltage Regulator Adjustment (17.5 kW Units)
Adjustments
From a Generac service manual covering: GPS 12500, GPS 15000, GPS 17500. Check it applies to your exact model before use.
Applies to: Generac GPS 12500, Generac GPS 15000
Procedure
- Perform adjustment with generator running at no-load.
- Set AC frequency to 62 Hz (62 Hz equals 3720 rpm).
- Adjust potentiometer to obtain about 252 volts line-to-line.
Tools required
- AC voltage/frequency meter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 62 Hz (3720 rpm)
- about 252 volts line-to-line
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.