Desa GENERATOR User Manual

PORTABLE GASOLINE

GENERATORS

SUPPLEMENTAL INSTRUCTIONS FOR FACTORY INSTALLED

AUTO-IDLE EQUIPPED GENERATORS

L

E

U

F

F

1

2
0

V

O

L
T

S

R
E

S
E

T

T

E
S

T

A
u

to

-I
d

le

O

N

O

F
F

EN

M

00000005

H
O
U

R

R

ES

S

1

/1

2

E

40 V

T

0

O

LT

S

R
E

SET

10,000 Watt Portable Generators

(See Owner's Manual and Installation Manual for General Operation)

IMPORTANT
Read and understand this manual before operating or servicing
generator. Improper use of generator can cause serious injury.
Keep this manual for future reference.

S

Notice:

The 250 volt/50 amp receptacle is not connected through the
auto-idle circuit. Auto-idle rocker switch must be turned off to get
full power out of this receptacle (see Figure 1).

WARNING: Improper installation, adjustment, al-

teration, service, or maintenance can cause injury or
property damage. Only a qualified electrical service
person should service and repair generator.

• Generator produces high voltage. Use extreme
caution when working on electrical parts.

• Turn off generator and let cool before installation.
Severe burns may result.

• Remove spark plug wire from spark plug before
installation. This will prevent accidental starting.

• Use only factory-approved replacement parts.

STOPPING ENGINE

IMPORTANT:

locked in preset position. Do not adjust throttle.
Follow the steps below to stop engine.

1. Remove all electrical loads from generator (see Disconnecting
Electrical Loads in owner’s manual, page 13). Remove elec­trical loads one at a time.

2. Let engine run for two or three minutes after removing electri­cal loads. This lets engine cool slightly.

3. Turn engine key switch to the OFF position (see Figure 1).

4. Turn fuel valve off. Do this by rotating valve, located under
fuel tank, clockwise to the horizontal position (see Figure 3).

The loaded engine speed is preset. The throttle is

PRESTART

Operate generator on a firm, dry, and clean surface. The surface must
be level. Protect generator from heavy dust, sand, dirt, rain, or snow.
Do not locate generator near standing water and snow. Make sure
area is well-vented.

WARNING: Only responsible adults should use
generator. Never let anyone operate generator with­out proper instructions.

Note:

If oil level is too low, oil alert system will keep engine from

starting (see Oil Alert System in owner’s manual, page 8). Make sure
oil level is full before starting. See Engine Oil in owner’s manual,
page 8.

Before starting the engine, disconnect all electric loads from generator.

STARTING

IMPORTANT:

locked in preset position. Do not adjust throttle. Preset position lets
engine run at 3600 RPM under load. The engine must maintain 3600
RPM for generator to create correct voltage. Running engine at
lower speeds will damage generator and powered items.

IMPORTANT:

nected. Start engine before adding electrical loads.

The loaded engine speed is preset. The throttle is

Never start generator with electrical loads con-

OPERATION INSTRUCTIONS

1. If the engine is cold, turn Auto-Idle switch off (see Figure 1).

2. Start Engine. Allow engine to warm up with no load for five
minutes.

3. Turn Auto-Idle switch on. Engine will slow to idle speed. En­gine idle speed is preset. Idle speed adjustment should not be
necessary.

4. Operate generator according to specifications outlined in
owner’s manual.

5. Engine will automatically increase to normal operating speed
when you plug load into any generator outlet.

6. Auto-Idle system should be turned off when generator is shut
down.

RESET

TEST

Auto-Idle

ON

OFF

ENM

00000005

HOURS 1/10

Auto-Idle Switch
(Rocker Switch)

250 volt/50 amp
receptacle

Figure 1 - Auto-Idle Switch Location

HONDA

ENGINE SW.

OFFONSTART

Key Switch

Figure 2 - Engine Key Switch

RESET

240 VOLTS

RESET

RESET

RESET

2

103166

Fuel Valve Lever
(Off Position)

OFF

Figure 3 - Fuel Valve In Off Position

ADJUSTING THE IDLE SPEED

IMPORTANT:

• Only if the idle speed becomes too high

• If engine idle speed will not regulate (engine idles and speeds up

again and again).

1. Turn Auto-Idle switch off. Start engine. Allow engine to warm
up with no load for five minutes.

WARNING: Guard against burns. Hot muffler,
exhaust manifold, and engine parts can cause severe
injury. Use caution and remain alert when adjusting
or using generator.

2. Hold plunger in solenoid body to manually engage solenoid
and set idle speed.

Adjust the idle speed

Governor Spring

Engine Governor Arm

15. Retaining Ring

3. Linkage Rod

Lock Washer
Nut

Plunger

2. Roll Pin

3. Linkage Rod

2. Roll Pin

Plunger

9. Solenoid
Mounting Bracket

1. Solenoid Assembly
(Includes Plunger, Nut,
and Lock Washer)

9. Solenoid
Mounting Bracket

14. Nylon Washer

5. Lock Nut

WARNING: Always set the idle speed before
turning on the Auto-Idle. If idle speed is not set, the
large resistor on the control board may become hot.
Heat from the resistor may damage the protective
coating on the control board.

3. Slowly pull solenoid and bracket away from engine. This will
slow the engine. Make sure to hold plunger into solenoid dur­ing this step.

4. With a volt meter, check the no-load output voltage at the 120­volt duplex receptacle. At proper idle speed (2680 minimum
RPM) the meter should read 50-60 volts. Lower settings will
cause the auto-idle to not operate properly.

5. Locate proper solenoid mounting bracket positioning. Line up
solenoid body so that plunger will fully engage into body with­out any interference.

6. Turn Auto-Idle switch on. Make sure solenoid is engaged.
When solenoid is engaged, the solenoid pulls plunger back
into solenoid.

7. If the engine speed is too slow, the engine will want to “hunt.”
When engine hunts, it speeds up and then slows down repeat­edly. When this occurs, increase engine speed by adjusting
throttle stop screw on carburetor (refer to Carburetor Adjust-
ment in Honda Engine Manual).

103166

12. Nylon Spacer

D

ESA INTE

RN

A

S2

11. Control Board
Assembly

TIO

N

S1

AL

L1

L2

4. Screw

Key Part

No. Number Description Qty.

1 100324-03 Solenoid Assembly (includes 1

plunger, nut, and lock washer)
2 22822000 Roll Pin 1
3 100755-01 Linkage Rod 1
4 26499000 Hex Head Screw, 10-32 x 3/4" 4
5 26514000 Lock Nut, 10-32 4
6 100320-01 Yellow Wire 1
7 100322-01 White Wire (with 2 flags) 1
8 100322-02 White Wire (with 1 flag 1

and 1 spade)
9 102939-01 Solenoid Mounting Bracket 1

10 100366-01 Rocker Switch 1
11 100105-01 Control Board Assembly 1
12 100321-01 Nylon Spacer 4
13 01076002 Flat Washer, #10 4
14 103811-01 Nylon Washer 1
15 103812-01 Retaining Ring 1

∆ 103257-01 PC Board Kit 1
† 103258-02 Solenoid Assembly Kit 1

∆ Includes Parts 4, 5, 6, 7, 8, 10, 11, 12, and 13
† Includes Parts 1, 2, 3, 9, 14, and 15

3

13. Flat
Washer

11. Control
Box

White
White

To
Auto-Idle
Solenoid

Auto-Idle

Control Board

S2

S1

T1-3

Solenoid

L1

Red

WhiteWhite

Green

Yellow

Capacitor

Red

Yellow

White

White

Circuit

Breaker

45A

L2

Circuit

Breaker

45A

T1 T2T3T4

250V 50A

Receptacle

Red

Yellow

Black

Red

White

Green

Main

Windings

T2

Circuit

Breaker

30A

Circuit

Breaker

30A

T1

250V 30A

Receptacle

Red

Wh

White

Black

T4

Diode

Rotor

Diode

T3

White

Black Black

Run

Light

Hour Meter

Black

Stator

125V, 15A

Receptacle

Red
Black
White

Stator

T1 T2 T3 T4

220/240V

L1

110/120V

Green

Green

110/120V

Green

GFCI 125V, 15A

Black

Receptacle

Black

L2

WhiteWhite

125V, 30A

Receptacle

Green

Black

Black

Black

Circuit

Breaker

Circuit

Breaker

20A

Resistance in Ohms

Rated Stator Main Stator Auxiliary Rotor Primary Rotor Secondary Capacitor, Diodes,
Watts Winding * Winding ∆ Winding † Winding † MFD 450 Volt (2) 800 Volt

10,000 0.4 0.9 0.37 0.5 80 70Amp

20A

Black

* Connect T2 and T3. Measure resistance between T1 and T4.
∆ Disconnect capacitor leads in order to read auxillary winding resistance.
† Remove diodes to check resistance.

P.O. Box 90004

Bowling Green, KY 42102-9004

Technical Service Department 1-800-858-8501

www.desatech.com

103166-01
Rev. D
07/03