MMD Equipment 25S-3A3 - Manual (Page 50)

6. Periodic Inspection/Maintenance
6-8
6.5.3 Check GFCI Receptacles
Check GFCI receptacles monthly or 250 hours operation, whichever comes first.
If the generator is stored outdoors, unprotected from the weather, test the GFCI receptacle
before each use.
In case the GFCI has tripped due to the hazard of ground fault currents, investigate the
cause and correct it.
Regularly check the GFCI operation for safety.
(Procedure)
① Unplug all appliances from the generator.
② Start the engine.
③ Turn each single-phase and three-phase breaker
ON.
④ Press the TEST BUTTON
The RESET BUTTON should extend with a
click.
If the RESET BUTTON does not extend, contact
your nearest dealer.
⑤ Press the RESET BUTTON
⑥ When the RESET BUTTON extends during
operation:
Unplug all appliances from the GFCI protected
receptacle.
Press the RESET BUTTON:
IF THE GFCI CANNOT BE RESET: The GFCI is faulty. Contact your nearest dealer.
IF THE GFCI RESETS PROPERLY: Check the appliance or the power cord.