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Power Systems, Inc. 21
4.12 OUT OF SERVICE PROCEDURE
4.12.1 REMOVAL FROM SERVICE
If you cannot exercise the generator every seven days,
and it is to be out of service longer than 90 days, pre-
pare the generator for storage as follows:
1. Start the engine and let it warm up.
2. Close the fuel shutoff valve in the fuel supply line
and allow the unit to shut down.
3. Once the unit has shut down, it will signal a low oil
fault.
4. Set the Auto/Off/Manual switch to OFF and turn off
the utility power to the transfer switch.
5. While the engine is still warm from running, drain
the oil completely. Refill the crankcase with oil. See
”Engine Oil Recommendations,” Section 4.3.1 (Page
15).
6. Attach a tag to the engine indicating the viscosity
and classification of the oil in the crankcase.
7. Remove the spark plug(s) and spray fogging agent
into the spark plug(s) threaded openings. Reinstall
and tighten the spark plug(s).
8. Remove the battery and store it in a cool, dry room
on a wooden board. Never store the battery on any
concrete or earthen floor.
9. Clean and wipe the entire generator.
4.12.2 RETURN TO SERVICE
To return the unit to service after storage, proceed
as follows:
1. Verify that utility power is turned off and that the
Auto/Off/Manual switch is set to OFF.
2. Check the tag on the engine for oil viscosity and
classification. Verify that the correct recommended
oil is used in the engine (see Section 4.3.1, Page 15).
If necessary, drain and refill with the proper oil.
3. Check the state of the battery. Fill all cells of
unsealed batteries to the proper level with distilled
water. DO NOT USE TAP WATER IN THE BATTERY.
Recharge the battery to 100 percent state of charge,
or, if defective, replace the battery. See
“Specifications,” Section 1.5 (Page 6), for type and
size.
4. Clean and wipe the entire generator.
5. Reconnect the battery. Observe battery polarity.
Damage may occur if the battery is connected incor-
rectly.
6. Open the fuel shutoff valve.
7. Start the unit by moving the Auto/Off/Manual switch
to MANUAL. Allow the unit to warm up thoroughly.
8. Stop the unit and set the Auto/Off/Manual switch to
AUTO.
9. Turn on the utility power to the transfer switch.
10. Your generator is now ready for service.
NOTE:
If the battery was dead or disconnected, you must
reset the exercise timer.
Section 4 — Maintenance
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators