Multiquip MQP20P manual Generator Storage, Adjustment Procedure, maintenance

maintenance

used to adjust the generator output voltage. Clockwise adjustment increases the generator output voltage.

2.Stability Adjust — System stability is the ability of the generator to respond to load transients. Decreasing the stability makes the generator less sluggish and faster to respond to load transients.

If the stability of the regulator is decreased too much, the generator will tend to hunt under steady state conditions. Increasing stability increases the response time of the generator while decreasing stability decreases response time.

The screwdriver adjustable potentiometer is used to adjust the system stability. Clockwise adjustment increases stability.

3.Roll-Off Frequency Selection — The roll-off point is the frequency where the generator voltage starts to decrease.This reduces the kilowatt load to the engine, which allows the engine to recover in speed under any load transient condition.

The voltage regulator has the roll-off point preset to 58 Hz in the 60 Hz mode. To change the roll off point, perform the following:

a.Adjust the engine to the desired rated speed (60 Hz).

b.Set the voltage to the desired setting at rated speed.

c.Adjust the engine speed to the desired roll-off point.

d.Turn the potentiometer counterclockwise until the voltage returns to rated.

e.Readjust the engine speed to rated speed.

F1 and the negative lead to F2 or use an appropriate AC voltmeter on the generator output leads.

6.Start and run the generator at no load and rated speed. The generator voltage should build up to a minimum level. If it does not build up, refer to the generator manual for field flashing information.

7.Slowly adjust the Voltage Adjust potentiometer until the generator voltage reaches the nominal value. Also adjust the remote Voltage adjust to set the generator voltage to the exact value desired.

8.Turn the Stability Adjust potentiometer counterclockwise until instability is shown on the voltmeter. With the system operating in an unstable condition, slowly adjust the Stability Adjust potentiometer clockwise until generator stability is reached.

9.Interrupt the regulator power for a short period of time (1 to 2 seconds).

10.If the generator remains stable, no further adjustment is necessary.

11.If generator does not remain stable, increase the stability slightly and interrupt the regular power again.

12.Repeat step 11 until system stability is reached and maintained.

Generator Storage

For long term storage of the generator the following is recommended:

1.Drain the fuel tank completely.Treat with a fuel stabilizer if necessary.

2.Completely drain the oil from the crankcase and refill, if necessary, with fresh oil.

Adjustment Procedure

1.Make sure that the voltage regulator is connected correctly to the generator. Refer to the generator wiring diagram.

2.Turn the Voltage Adjust potentiometer fully counterclockwise.

3.Turn Stability Adjust potentiometer fully clockwise.

4.Set the remote Voltage Adjust to the center position.

5.Connect the positive lead of a 100 VDC voltmeter to

3.Clean the entire generator, inside and outside.

4.Disconnect the battery.

5.Make sure engine coolant is at proper level.

6.Cover the generator and store in a clean, and dry place.

MQP20P STANDBY GENERATOR • operation and parts manual — rev. #1 (11/28/11) — page 35