Shindaiwa DGK25F User manual

OWNER
’
S AND OPERATOR
’
S MANUAL
Vertical, Water-Cooled 4-Cycle Diesel Engine
DGK25F
X750-028 08 0
X750801-670 0
CAUTION
Do not operate the Generator, or any other appliance, before you have read and
understood the instructions for use and keep near for ready use.
WARNING
CALIFORNIA – Proposition 65 Warning
Diesel engine exhaust and some of its constituents are known to the State of
California to cause cancer, birth defects, and other reproductive harm.
Battery posts, terminals and related accessories contain lead and leads compounds,
chemicals known to the State of California to cause cancer, birth defects and other
reproductive harm. Wash hands after handling.

Introduction
Thank you for purchasing this Shindaiwa soundproof diesel engine generator.
This manual has been created to ensure safe usage of this generator. Be sure to read this
manual before operation. Improper operation/handling of this generator will result in an accident
or malfunction.
Handling/Operation of this generator can only be performed by persons who understand the
contents of this manual and can handle/operate the generator in a safe manner. Persons who
suffer from an illness, are taking medicine or not feeling well such that safe operation would be
negatively affected must not operate this generator.
Work performed using this generator and handling/operation of this generator must be in
accordance with corresponding laws and regulations based on such laws. Consult with the
authorized distributor where this generator was purchased if you have any inquiries regarding the
corresponding laws.
Always be sure to include this manual when loaning out this generator and instruct operating
personnel to read this manual before operation.
Store this manual in a specified location where it will be secure and available for consulting at any
time. Order another copy from the authorized distributor where this generator was purchased if
this manual becomes dusty, grimy or torn.
Consult with the authorized distributor where this generator was purchased if you have any
inquiries regarding any points related to this generator and manual.
When inquiring about this generator, be sure to provide the model name and serial number.
If disposing of this generator, do so in a manner that is in compliance with laws related to industrial
waste. Contact the authorized distributor where the generator was purchased if you have any
inquiries regarding proper disposal.
Caution notice ranks in this manual are classified as follows.
WARNING: Indicates a potentially hazardous situation which, if not
avoided, can result in death or serious injury.
CAUTION : Indicates a potentially hazardous situation which, if not avoided,
can result in minor or moderate injury and property damage.
< Note > : Other types of cautions and indications.
Note that CAUTION items can also lead to major accidents under some circumstances if
not correctly followed.
All caution notices are important. Be sure to follow all of them.

1
Table of Contents
1. Safety Instructions .......................................................................... 2
2. Specifications .................................................................................. 6
2-1. Specifications ............................................................................ 6
2-2. Ambient Conditions ................................................................... 7
3. Applications ..................................................................................... 7
4. Part Names....................................................................................... 7
4-1. External View/Part Names ........................................................ 7
4-2. Operation Panel Configuration .................................................. 9
5. Equipment ...................................................................................... 10
5-1. Three-phase and Single-phase simultaneous Output ............. 10
5-2. Available Output Monitor ......................................................... 10
5-3. Spill Containment .................................................................... 10
5-4. Warning Indicators .................................................................. 11
5-5. Spill Containment Overflow Warning Indicator ........................ 13
5-6. Meters and Gauges................................................................. 14
5-7. Fuel Piping Switch (3Way Fuel Valve)..................................... 17
6. Transport/Installation .................................................................... 18
6-1. Transport Procedures.............................................................. 18
6-2. Installation Procedures............................................................ 18
7. Load Connections ......................................................................... 19
7-1. Load Cable Selection .............................................................. 19
7-2. Connecting Load Cables ......................................................... 20
8. Pre-Operation Inspection.............................................................. 23
8-1. Checking Engine Oil................................................................ 23
8-2. Checking Coolant.................................................................... 24
8-3. Checking the Fan Belt ............................................................. 25
8-4. Checking the Fuel ................................................................... 26
8-5. Checking the Spill Containment .............................................. 27
8-6. Checking for Fuel, Oil and Coolant Leak................................. 27
8-7. Checking the Battery............................................................... 27
9. Operating Procedures ................................................................... 28
9-1. Initial Start up/Pre-Check ........................................................ 28
9-2. 240/480V Switching Selection................................................. 29
9-3. Procedures during Operation .................................................. 30
9-4. Stopping Operation ................................................................. 31
9-5. Protective Functions................................................................ 32
9-6. Connecting with External Fuel Tank ........................................ 33
10. Inspection/Maintenance ................................................................ 34
11. Long-Term Storage........................................................................ 44
12. Troubleshooting............................................................................. 46
13. Generator Circuit Diagram............................................................ 49
14. Engine Electrical Circuit Diagram ................................................ 50

2
1. Safety Instructions
WARNING : EXHAUST GAS POISONING
Do not operate the generator in poorly ventilated areas such as indoors or tunnels, as the exhaust
gas of the engine contains substances that are harmful to human health.
Do not direct exhaust fumes at bystanders or buildings.
WARNING : ELECTRIC SHOCK
Do not operate the equipment with any doors or covers open.
Before connecting or disconnecting load cables to/from the output terminal, always turn the output
circuit breakers to the OFF position, stop the engine, and remove the starter key.
Close the output terminal cover before operating.
Do not insert a pin, wire or other metal object into the electrical outlet.
Do not touch the generator if the generator or casing or your body becomes wet during operation.
Do not touch internal electric parts while the generator is operating.
Always be sure to stop the engine and remove the starter key before performing any equipment
check or maintenance.
WARNING : INJURY
Close all doors and lock them during operation.
Do not open the check door during operation. Be careful of pinching or catching of moving parts
such as the cooling fan and fan belt.
Always be sure to stop the engine and remove the starter key when performing inspection or
maintenance.
Use the lifting hook to lift the machines, and do not lift up by using tie downs. Use of such could
result in the generator falling.
Do not lift any additional weight such as fuel tanks or trailers.
No persons should be under a suspended generator at all time.
Always be sure to check that the breakers on load side and switches for any equipment using the
generator are at OFF before turning the breaker to ON. Also be sure to advise personnel on the
load side that power will be turned on or off before operating the breaker.
Do not modify the equipment and do not operate with parts removed.
Do not use the fuel tank lifting hook to lift up when the fuel tank that contains fuel, and also do not
lift up with the fuel tank and spill containment as a single unit. Doing so could result in the tank
falling.
CAUTION : EYE/SKIN INJURY
Wear rubber gloves and other protective wear to protect eyes, skin and clothing from the battery
fluid which contains diluted sulfuric acid. If the battery fluid contacts eyes or skin, wash out
immediately with a sufficient amount of clean water. Be sure to receive medical treatment,
especially if the fluid contacts the eyes.

3
CAUTION : EXPLOSION
Never use or recharge the battery if the fluid level is below the minimum level.
Do not create sparks or bring flame near the battery as it generates flammable gas.
CAUTION : FIRE
Do not carry flammable items (such as fuel, gas and paint) or items that are highly combustible
near the generator as the muffler, exhaust gas and other parts become extremely hot.
Position this generator 3 ft. (1 m) or more from walls or other hindrances, and on a level surface.
Do not connect the generator output to indoor wiring.
This generator uses diesel fuel. Always be sure to stop the engine and not bring flames close
when inspecting fuel or refueling. Wait until the engine has cooled before performing such
procedures.
If fuel spills, always be sure to open the spill containment drain faucet and drain off the spilled fuel.
Do not operate the equipment with liquid accumulated in the spill containment.
If fuel or oil is leaking, repair the leaking location before operating.
Always be sure to wipe up any spilled fuel or oil.
Allow the generator to cool before covering with the protective cover.
Never allow flame to come close to the generator.
Always make sure that the engine is stopped when working on piping.
After working on the piping, check that there is no fuel leakage.
Absolutely never inspect or perform maintenance to the equipment near fire or other open flame.
CAUTION : ELECTRIC SHOCK
Do not sprinkle water on the equipment and do not use where exposed to rain.
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after stopping the engine as
they are still extremely hot.
Do not open the radiator cap immediately after stopping the engine. Doing so will result in hot
steam gushing out.
Hot steam gushes out from the coolant sub-tank if the generator overheats. Do not touch the
coolant sub-tank.
Always be sure to stop the engine and allow the engine to cool when performing inspection or
maintenance of engine oil. Opening the oil gauge or oil filler cap during operation will result in hot
oil gushing out.

4
CAUTION : INJURY
Always be sure to use lifting hooks when lifting up the generator, and slowly lift it straight up.
Personnel performing lifting work must wear protective gear such as helmets, safety shoes and
gloves.
Remove the wood ties if using anchors to secure the generator
Position the generator on a level stable surface so that it cannot slide or move in any manner.
Before starting operation, always be sure to turn off all switches of equipment using the generator
and all breakers to OFF.
Do not move the generator during operation.
Do not operate the generator if it has been modified or any parts have been removed.
Securely fix the equipment with rope or similar item so that it cannot move when transporting by
truck or other vehicle.
CAUTION : PROPERTY DAMAGE
Do not use the equipment for any improper applications. Improper usage can result in an accident
or malfunction.
If using this generator for medical equipment, check before use with the medical equipment
manufacturer, doctor, hospital or similar entity.
Check that the generator output setting, output terminal connection and load power source are
consistent.
Cable burnout can occur due to generated heat if the load current exceeds the allowable current
of the cable.
The voltage drop between cables is large if the cable is excessively long or thin, resulting in
decreased input voltage to equipment using the generator, thereby causing decreased
performance, faulty operation and malfunction.

5
Warning /Caution Label Locations
If warning or caution labels become damaged and difficult to read, replace with new labels in
the indicated locations. Order labels using part number indicated in the parenthesis.
①Caution: do not change (Part no. : X505-004620)
②Warnig caution (Part no. : X505-007571)
③Fire (Part no. : X505-007650)
④EPA regulation complied notice (Part no. : X505-008400)
⑤Spill containment bolts (Part no. : M707-000380)
⑥Injury (Part no. : X505-007550)
⑦Caution: GM SPEC LLC (Part no. : X505-007840)
⑧Terminal cover instructions (Part no. : M704-002250)
⑨Simul-Phase (Part no. : X505-008620)
⑩Continuous output (Part no. : M705-001050)

6
2. Specifications
2-1. Specifications
Model Unit DGK25F
Alternator
Generator Type - Revolving Field Brushless
Rated Frequency Hz 60
Rated Output(Prime)
Three phase kVA 25
kW 20
Single phase kVA 15 [7.5] *1
kW 15 [7.5] *1
Standby Output
Three phase kVA 27.5
kW 22
Single phase kVA 16.5 [8.3] *1
kW 16.5 [8.3] *1
Rated Voltage Three phase V 208/240/ [480] *1
Single phase V 120/139/240/[277] *1
Rated Current
Three phase-208V A 60
Three phase-240V A 60
Three phase-480V A 30
Single phase-120V A 62.5×2 [31.3 x 2]*1
Single phase-240V A 62.5 [31.3]*1
Power Factor - Three phase 0.8, Single phase 1.0
Insulation class - F
Excitation - Self Excitation (brushless)
No. of Poles - 4
Engine
Type - Vertical Water-Cooled 4-Cycle Diesel
Model(Manufacturer) - 4LE2T(ISUZU)
No. of Cylinders
(bore × stroke) (in./mm) 4(3.35x3.78/85x96)
Continuous Rated
Output hp 33.5
Rated Speed rpm 1,800
Displacement cu.in./liters 133/2.179
Combustion System - Direct injection (Turbo-charged)
Cooling Method - Water cooled
Starting Method - Electric
Fuel - No.2-D,S15 EPA regulation
Lubricating Oil - API service-type CJ-4 class
Fuel Tank Capacity gal./liters 51.5/195
Lubricant Volume gal./liters 2.7/10.4(including filter 0.1/0.4)
Cooling Water Volume gal./liters 2.6/10(including sub-tank 0.3/1.0)
Starting Motor Capacity V-kW 12-2.0
Charging Alternator Capacity V-A 12-50
Battery Capacity V-Ah 12-72
Unit
Length in./mm 63/1,603
Width in./mm 33/850
Height in./mm 55/1,400
Dry Weight lbs./kg 1,929/875
Net Weight lbs./kg 2,359/1,070
*1:Output in the brackets shows when the selector switch is set at 480V.

7
2-2. Ambient Conditions
Use this generator in ambient conditions as described below. Failure to provide these
conditions can result in problems such as malfunction, insufficient output and reduced
durability.
■Ambient temperature: 5 to 104 °F (-15 to 40 °C)
■Relative humidity: 80% or less
■Altitude: 984 ft. (300 m) or less
3. Applications
Power source for submerged pumps and similar civil engineering equipment
Power source for lighting and similar equipment
Power source for electrical tools and household appliances
4. Part Names
4-1. External View/Part Names
CAUTION : PROPERTY/SECONDARY DAMAGE
Do not use for any application other than those listed above.
If using this generator for medical equipment, check before use with the
medical equipment manufacturer, doctor, hospital or similar entity.
Tie-Down
Radiator Plate
Lifting Hook Tie-Down
Operation Panel Door
Terminal Cover
Fuel Inlet Cover
Spill Containment Drain Plug
Spill Containment Drain faucet
Fuel Drain Plug

8
Accessories
Owner’s
and
Operator’s
Manual
Engine
Warranty
Manual
Starter Key (2 pieces)
Engine Check Door
Alternator Check Door
External Fuel Inlet
External Fuel Return
3way Fuel Valve
Fuel Filter
(Main)
Electromagnetic Fuel Pump
Fan Guard
Radiator
Fuel Filter
(Pre)
Coolant Sub-Tank
Engine Check Door
Oil Drain Plug Coolant Drain Plug
Battery
Alternator Check Door
Air Cleaner
Oil Filter
Oil Filler Oil Level Indicator
Fuel Tank
（Inside）

9
4-2. Operation Panel Configuration

①Circuit Breaker(3-Phase & 1-Phase) ⑫Oil Pressure/Water Temperature/Speed
Selector Switch
②Voltmeter ⑬Available Output Monitor
③Ammeter ⑭Display Selector Switch
④Frequency Meter ⑮Fuel Meter
⑤Pilot Lamp ⑯Hour Meter
⑥Voltage Regulator ⑰Pre-Heating Indicator
⑦Ammeter Selector Switch ⑱Starter Switch
⑧Breaker Trip Selector Switch ⑲Throttle Switch
⑨Warning Indicators ⑳Voltage Selector Switch
⑩Spill containment Overflow
Warning Indicator ㉑Auto start Panel ( Optional )
⑪Engine Monitor

10
5. Equipment
5-1. Three-phase and Single-phase simultaneous Output
This generator is capable of generating three-phase and single-phase three-wire output
simultaneously. (Three-phase output terminal and single-phase three-wire output terminal are
equipped individually.)
Neither switching operation of output nor switching operation of wiring is needed.
< Note >
Refer to section “7-2. Connecting Load Cables” for Load Connections.
If using three-phase output simultaneously with a single-phase three-wire type output, use
in a range where the total current does not exceed the rated current.
5-2. Available Output Monitor
The available generated output for each output power source is displayed digitally. You can use
the display selector switch to change the display in the following order: three-phase,
single-phase three-wire U-W output, and single-phase three-wire U-N output, and single-phase
three-wire W-N output. Output of three-phase is always displayed when the engine is started.
< Note >
Consider the digitally displayed available output as an
approximate estimate. Be sure to thoroughly consider the
displayed value and the used load capacity when using a load
such as a motor with large starting capacity.
The displayed output capacity might not be correct values if
using a four-wire connection (single-phase using the N
terminal) for a three-phase output power source. Connect to a
single-phase/three-line type power source if using a
single-phase power source.
If “- -” is displayed for the available output, it means that usage
has exceeded the rated capacity. Immediately stop the equipment being used and reduce the
load capacity of the equipment.
5-3. Spill Containment
WARNING : INJURY
Do not open the check door during operation. Be careful of pinching or
catching of moving parts such as the cooling fan and fan belt.
Always be sure to stop the engine and remove the starter key when
performing inspection or maintenance.
Three-Phase and Single-Phase Three-Wire Output Terminal
U WL1 L2 L3 N GROUND
Display Selector Switch

11
The bed of this generator is equipped with a spill containment (structure for preventing
leakage of liquid) so that any spilled liquid will not leak to outside of the generator when oil or
fuel is spilled or leak. Before starting operation, check if there is accumulated liquid in the spill
containment. Flush out any liquid that has accumulated.
(Refer to section “8-5. Checking the Spill Containment” for inspection procedures. )
(Refer to section “10. Inspection/Maintenance (9) Flushing Liquid in Spill Containment” for
flushing procedures.)
The generator is equipped with the following in order to prevent liquid from spilling in case you
forget to flush the liquid: The operation panel is equipped with an indicator that illuminates
when its sensor is triggered as the spill containment capacity accumulated enough liquid to
reach the about 8gal ( 30.3 liters ).
If the liquid stored in the spill containment exceeds approximately about 17gal ( 64.3 liters )
during operation, the SPILL CONTAINMENT overflow warning indicator illuminates, and the
engine will be automatically stopped. If this occurs, flush the liquid stored in the spill
containment.
(Refer to section “10. Inspection/Maintenance (9) Flushing Liquid in Spill Containment”.)
< Note >
Water can also accumulate in the spill containment due to rain entering into the generator.
Accordingly, you should periodically flush liquid accumulated within the generator. However, you
should flush water according to the frequency/amount of rainfall.
The types of liquids that can accumulate in the spill containment include oil, fuel, coolant and
battery fluid such that it is not possible to distinguish between rainwater and other liquids. Dispose
of flushed liquids according to the applicable laws and regulations.
5-4. Warning Indicators
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after
stopping the engine as they are still extremely hot.
WARNING : INJURY
Do not open the check door during operation. Be careful of pinching or
catching of moving parts such as the cooling fan and fan belt.
Always be sure to stop the engine and remove the starter key when
performing inspection or maintenance.
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after
stopping the engine as they are still extremely hot.

12
This generator is equipped with the following warning indicators: BATTERY (insufficient
charging), OIL PRESS (engine oil pressure), WATER TEMP (coolant temperature), OVER
SPEED (engine overspeed), AIR FILTER (air cleaner clogging), SPILL CONTAINMENT (spill
containment amount), and ENGINE (engine malfunction). When the engine starts, all the
lamps will be lights off. An indicator illuminates if a malfunction/fault occurs during operation
and the engine automatically stops depending on the fault type. Moving the starter switch from
STOP to RUN causes the BATTERY warning indicator to illuminates and ENGINE for warning
indicator to illuminates approximately 3 sec.
(1) BATTERY (Insufficient Charging) Warning Indicator (Low Battery Voltage)
The BATTERY warning indicator illuminates when charging is not possible during operation.
If this occurs, contact authorized distributor where the generator was purchased.
< Note >
This battery charging warning indicator cannot detect battery deterioration or insufficient battery
fluid. (Refer to section “8-7. Checking the Battery”.)
(2) OIL PRESS (engine oil pressure) Warning Indicator (Low Oil Press.)
CAUTION: BURNS
Always be sure to stop the engine and allow the engine to cool when
performing inspection or maintenance of engine oil. Opening the oil gauge or
oil filler cap during operation will result in hot oil gushing out.
If the engine oil pressure drops below 14 psi (0.98 x 100 kPa) during operation, the OIL
PRESS warning indicators illuminates, and the engine will be automatically stopped.If this
occurs, check the engine oil level and add engine oil until it reaches the maximum level.
< Note >
This oil pressure warning indicator cannot detect oil deterioration. Change the engine oil
periodically. (Refer to section “8-1. Checking Engine Oil”.)
(3) WATER TEMP (Coolant Temperature) Warning Indicator (High Water Temp.)
CAUTION: BURNS
Do not open the radiator cap immediately after stopping the engine.
Doing so will result in hot steam gushing out.
Hot steam gushes out from the coolant sub-tank if the generator overheats.
Do not touch the coolant sub-tank.
If the coolant temperature rises above 212 °F(100℃) during operation, the WATER TEMP
warning indicators illuminates, and the engine will be automatically stopped. If this occurs,
hot steam will gush out of the coolant sub-tank. Check the coolant sub-tank coolant level
after the generator cools and add coolant to the coolant sub-tank if it is insufficient. (Refer to
section “8-2. Checking Coolant”.) If the coolant is at the specified amount, it is probable that
the fan belt is loosen or there is a coolant leak. Wait for the engine to cool down and inspect
for these problems.
< Note >
The coolant temperature cannot be detected if the coolant level is excessively low. Always be
sure to check the coolant level in the radiator coolant sub-tank before starting operation.

13
(4) OVER SPEED (Engine Overspeed) Warning Indicator
This generator is equipped with a function such that the engine is automatically stopped if an
engine fault occurs causing the engine speed to increase excessively. If the engine speed
rose above 2,070rpm during operation, the OVER SPEED warning indicators and ENGINE
warning indicators illuminates, and the engine will be automatically stopped. If this occurs, it
is probable that some malfunction has occurred in the engine. Contact authorized distributor
where the generator was purchased.
(5) AIR FILTER (Air Cleaner Clogging) Warning Indicator
The AIR FILTER warning indicator illuminates if the air cleaner element becomes clogged
during operation. If it illuminates, immediately stop the engine and clean or replace the air
cleaner element.
(Refer to section “10. Inspection/Maintenance (3) Air Filter Element Cleaning/Replacement”.)
(6) SPILL CONTAINMENT (Spill Containment Amount) Checking Indicator
The SPILL CONTAINMENT checking indicator illuminates if the liquid stored in the spill
containment exceeds approximately about 8gal ( 30.3 liters ) during operation. If it illuminates,
immediately stop the engine and flush the liquid stored in the spill containment.
(Refer to section “10. Inspection/Maintenance (9) Flushing Liquid in Spill Containment”.)
< Note >
The engine may not be stopped only if the spill containment checking Indicator illuminates during
operation.
When the spill containment checking Indicator illuminates during operation, stop the engine,
check for fuel, oil and cooling water leakage, and repair as necessary.
Do not use the equipment with liquid accumulated in the spill containment. Drain the spill
containment before using.
(7) ENGINE (Engine Malfunction) Warning Indicator
The ENGINE warning indicator illuminates if the coolant temperature is high, the oil pressure
is low, the engine overspeeds, the battery voltage is low or some other engine fault occurs
during operation. If this occurs, a malfunction code is displayed on the engine and available
output monitors, and the engine automatically stops or the engine output is reduced.
If the ENGINE warning indicator illuminates, contact the authorized distributor where the
generator was purchased.
5-5. SPILL CONTAINMENT (Spill Containment Amount) Overflow Warning
Indicator
WARNING : INJURY
Do not open the check door during operation. Be careful of pinching or
catching of moving parts such as the cooling fan and fan belt.
Always be sure to stop the engine and remove the starter key when
performing inspection or maintenance.
CAUTION : BURNS
Do not touch the engine and surrounding components immediately after
stopping the engine as they are still extremely hot.

14
If the liquid stored in the spill containment exceeds approximately about 17gal ( 64.3 liters )
during operation, the SPILL CONTAINMENT overflow warning indicator illuminates, and the
engine automatically stops. If this occurs, flush the liquid stored in the spill containment.
(Refer to section “10. Inspection/Maintenance (9) Flushing Liquid in Spill Containment”.)
< Note >
Although the fluids that can leak internally consist of oil, fuel and cooling water, the spill
containment does not have a function that can separate rainwater that has leaked into the
equipment from these internally leaked fluids. Properly dispose of liquid drained from the spill
containment in a manner according to the applicable laws and regulations.
5-6. Meters and Gauges
Engine Meters and Gauges
(1) Hour Meter
Displays the operating time. Use this as a reference for managing periodic inspection
interval. Be careful as the hour meter operates when the starter switch is at RUN regardless
of whether the engine is running.
(2) Engine Monitor
Displays the engine speed, water temperature and oil pressure. Switching the selector
switch changes the display in the following order: Speed →Water temp →Oil press. Engine
speed is displayed first when the engine is started.
Speed
Displays the engine speed. 1,800rpm is displayed
at 60 Hz.
Water Temp
Displays the temperature of the engine coolant.
Normal temperature displayed during operation
should generally between 167°F (75℃) and 194°F
(90℃) depending on usage.
< Note >
If the coolant temperature rises above 212 °F(100℃), immediately stop all connected equipment
to the generator, and idle the engine while cool down the coolant temperature.
Oil Press
Displays the pressure of the engine lubrication system. Normal pressure displayed during
operation should generally between 28 and 85 psi (1.93−5.86 x 100 kPa) depending on
usage. However, the pressure may rise above this range just after starting a cold engine.
Idle the engine until it reaches the normal pressure.
(3) Fuel Meter
Displays the amount of fuel in the internal fuel tank. When the tank is full, all lamps are lit up
and FULL is displayed. The amount of lamps lit up decreases as the amount of fuel
decreases as it approaches EMPTY. Add fuel accordingly when only one lamp is displayed.
The fuel meter on the control panel will only display the fuel level for the internal fuel tank.
Hour Meter
Oil Press
Water Temp
Fuel Meter
Speed
Selector
Switch

15
Generator Meters and Gauges
(1) Voltmeter
The voltmeter displays the three-phase output
voltage (voltage between L1-L3). Check that
240 V is displayed during operation. Output
voltage for single-phase three-wire (voltage
between U-W) is the same voltage as the
three-phase output voltage (voltage between
L1-L3). Accordingly, use the voltage meter
displayed value as a reference.
* Check that 480 V is displayed during operation if using at the three-phase 480 V setting.
The voltage of single-phase three-wire output of “U-W Voltage” is a value that is one half of
the displayed voltage meter value.
(2) Ammeter
Displays the output current (phase current) of the generator. Turn the ammeter selector
switch to “L1+U” to display the output current of the three-phase L1 phase and single-phase
U phase. Turn the switch to “L3+W” to display the output current of the three-phase L3 phase
and single-phase W phase. “L2” displays the output current of three-phase output terminal
L2.
< Note >
If measuring the output current for a single-phase three-wire type, turn the ammeter selector
switch to “L1+U” or “L3+W”. The voltage cannot be accurately measured if set to “L2”.
(3) Frequency Meter
Displays the frequency of the power source. Check that 60 Hz is displayed during operation.
Indicators
(1) Pre-heating Indicator
The pre-heating indicator illuminates when the starter switch is
at PREHEAT. The pre-heating indicator turns off when
pre-heating is completed to indicate that it is possible to start
the generator.
< Note >
Pre-heating time depends on the coolant temperature, and
should be completed in approximately 0.5 to 8 sec.
(2) Pilot Lamp
This illuminates when the engine is operating to indicate that power is being generated.
Pilot Lamp
Pre-Heating Indicator

16
Switches
(1) Starter Switch
STOP
The engine is stopped and all power is
shut off with this position. The key can
be inserted and removed only in this
position.
RUN/PREHEAT
Position for operating the generator.
It is also the position for glow plug
preheating for cold climate condition.
< Note >
Do not leave the generator in this RUN position with the engine stopped.
Doing so will cause the battery to drain.
START
Position where the engine is started. If you remove your hand from the key, it returns to
RUN automatically.
(2) Breaker
This switch is for transmitting electrical power to the load side. Turn to ON position to output
voltage to the output terminals. Output to the load side is cut off when there is a short circuit
or overload on the load side.
< Note >
Do not turns off/on the breaker manually to operate or stop a load.
(3) Breaker Trip Selector Switch
This switch is for selecting the tripping order of the three-phase and single-phase breaker
when there is a short circuit or overload on the load side. If the three-phase or single-phase
breaker is selected for precedence in tripping, the selected breaker will trip first when the
total generator output exceeds the rated capacity.
After that, the other breaker will also trip if the generator output exceeds the rated capacity
again.
Switch Selection
“3
φ 1 φ ”: The three-phase breaker trips first followed by the single-phase breaker.
“Simultaneous (3
φ 1 φ )”: The three-phase and single-phase breakers trip
simultaneously.
“1
φ 3 φ ”: The single-phase breaker trips first followed by the three-phase breaker.
(4) Ammeter Selector Switch
This switch is for selecting the output current indicated by the ammeter. Change the switch
to display the following output terminal current on the ammeter.
Switch Selection
“L1+U”: Three-phase L1 phase + Single-phase three-wire U phase (total)
“L2”: Three-phase L2 phase
“L3+W”: Three-phase L3 phase + Single-phase three-wire W phase (total)
Ammeter
Selector Switch
Starter Switch
Breaker Trip
Selector Switch
3-Phase
Breaker
1-Phase
Breaker

17
< Note >
If measuring the output current for a single-phase three-wire type, turn the ammeter selector
switch to “L1+U” or “L3+W”. The voltage cannot be accurately measured if set to “L2”.
Voltage Regulator/Throttle Switch
(1) Voltage Regulator
This dial is for regulating voltage output by the generator. Turn the
dial clockwise to increase the voltage and counterclockwise to
decrease it.
(2) Throttle Switch
This switch is for changing the engine speed. Set to IDLING when starting,
warming up and cool down the engine, and set to RUN during rated operation.
5-7. Fuel Piping Switch (3Way Fuel Valve)
CAUTION:
Always make sure that the engine is stopped when working on piping.
Always be sure to wipe up any spilled fuel.
After working on the piping, check that there is no fuel leakage.
Change the three-way fuel valve to switch to supply fuel from the external tank. In that case,
the internal fuel tank will not be used.
(1) If using the internal fuel tank
Change the lever of the three-way fuel valve is turned to the “B” side to supply fuel from
the internal tank. It is turned to the “B” side when the generator is shipped from the
factory.
< Note >
When disconnecting piping from the external tank, turn the lever to the “B” side, and attach the
bundled plug (R1/2”) to the external tank fuel inlet/return.
(2) If using an external fuel tank
Connect hoses from the external fuel tank to the external fuel inlet and the external fuel
return. Change the lever of the 3way fuel valve to the “A” side to supply fuel from the
external tank.
Refer to “9-6. Connecting with External Fuel Tank” for corresponding procedures.
Position BP
os
i
t
i
o
n
A
Throttle Switch
Voltage Regulator
External Fuel
Return Plug
External Fuel
Inlet Plug
3Way Fuel
Valve