MQ Power DCA125SSIU4F User manual

THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
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WHISPERWATT™ SERIES
MODEL DCA125SSIU4F
60Hz GENERATOR
(ISUZU BR-4JJ1X DIESEL ENGINE)
Revision #0 (07/20/17)
OPERATION MANUAL

PAGE 2 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
PROPOSITION 65 WARNING
Diesel engine exhaust and some of

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 3
TABLE OF CONTENTS
DCA125SSIU4F 60Hz
Generator
Proposition 65 Warning ........................................... 2
Table Of Contents.................................................... 3
Nameplate/Safety Information ................................. 4
Safety Decals ..................................................... 5-10
Specifications ........................................................ 11
Dimensions............................................................ 12
Installation ........................................................ 14-15
General Information............................................... 16
Major Components ................................................ 17
Engine Control Unit (ECU) .................................... 18
Engine/Generator Control Panel............................ 19
Output Terminal Panel Familiarization .............. 20-22
Load Application.................................................... 23
Generator Outputs................................................. 24
Generator Outputs/Gauge Reading....................... 25
Output Terminal Panel Connections ................. 26-27
Inspection/Setup............................................... 28-32
Generator Start-Up Procedure (Manual) .......... 33-34
Generator Start-Up Procedure (Auto Mode).......... 35
Generator Shut-Down Procedures ........................ 36
Maintenance..................................................... 37-50
Generator Wiring Diagram..................................... 51
Engine Wiring Diagram.......................................... 52
Controller Wiring Diagram ................................ 54-55
Battery Charger Wiring Diagram ........................... 56
Jacket Water Heater Wiring Diagram..................... 57
Troubleshooting (Generator).................................. 58
Troubleshooting (Diagnostics) ............................... 59
NOTICE
Specifications are subject to change without notice.

PAGE 4 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
SAFETY DECALS
M91010000
CAUTION
HOT PARTS can burn skin.
DO NOT touch until the
machine has sufficiently
cooled.
M90310000
WARNING
HOT COOLANT can cause
severe burns.
Do not remove cap if
radiator is hot.
This machine stops and starts automatically
and without notice.
CAUTION
M92010060
M90300000
WARNING
MOVING PARTS can cause
severe injury.
DO NOT operate with doors
open.
Stop engine before servicing.
M90320000
WARNING
ENGINE EXHAUST can cause
severe injury or death.
Use only in open, well
ventilated areas or
vent exhaust outside.
TOP VIEW
FAN SHROUD
CAUTION
Maximum capacity of lifting
bail is 14,050 lbs.
M35000220
SIDE VIEW
M92010000
WARNING
ELECTRIC SHOCK HAZARD
Do not touch internal wiring
or connections while this
machine is operating.
Turn power off before
servicing.
M91020000
M92010070
WARNING
ARC FLASH AND SHOCK HAZARD
Appropriate PPE Required
Appropriate Personal Protection
Equipment and Tools Required
when working on this equipment.
WARNING
ELECTRIC SHOCK HAZARD
Do not touch output
terminals while this
machine is operating.
Turn power off before
servicing.
WARNING
ELECTRIC SHOCK HAZARD
Always complete the grounding
path from the ground terminal
on the genset to an external
grounding source.
WARNING
Before connecting this generator to any building’s
electrical system, a licensed electrician must install
an isolation (transfer) switch.
M92010050
Serious injury or death may result without this
transfer switch.
See instruction manual for
details.
HIGH VOLTAGE
DANGER
M92010040
Operation of this equipment may create
sparks that can start fires around dry
vegetation.
A spark arrestor may be required.
The operator should contact local fire
agencies for laws or regulations
relating to fire prevention requirements.
M90420000
SIDE VIEW
Ensure the “Auto-Off/Reset-Manual” switch is
in the “Off/Reset” position. If it is not, when
the battery cables are connected, the engine
will crank and attempt to start.
CAUTION
M91010040
WARNING
This unit is designed to contain operating uids only
The environmental containment is not designed to
control uids from an external source. It is the operator’s
responsibility to monitor uid levels at all times.
DO NOT EXCEED THE RECOMMENDED
MAXIMUM CAPACITY
ENVIRONMENTAL
M91110000
CAUTION
DO NOT disconnect the Battery Cables
after shutting down the engine for
at least 2-3 minutes M90130010
M90130010
SAFETY INSTRUCTIONS
Improper operation of this machine can cause
severe injury or death.
Read the instruction manual carefully
before operation or servicing.
This machine should only be operated by a
person with sufficient knowledge and skill
to ensure safe operation.
High voltage circuits are located inside the
output terminal cover and control panel.
Close the cover and control panel before
operating.
Moving parts and hot surfaces are contained
within the enclosure.
Close all doors and lock them before
operating. M92010030
U V W O
GROUND
CAUTION
Stop engine before
switching. M92010020A
M92010000
WARNING
ELECTRIC SHOCK HAZARD
Do not touch internal wiring
or connections while this
machine is operating.
Turn power off before
servicing.
FRONT VIEW
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
PSI
OIL PRESS
0
25 50 75
100 °F
WATER TEMP
100
140 180 220
260 VOLTS
BATTERY
6
12 18 24
30
°F
FUEL
E
½
FRPMX10
SPEED
0
120 150 180
210
60
INCREASE DECREASE
OFF
V
W
U
OFF
U-V W-U
V-W
WHISPERWATT
125 kVA AC GENERATOR
125 125
DANGER
Using a generator indoors CAN KILL YOU IN MINUTES.
120
V
OFF
GAC-2.2H
POWERED by
Honda Engines
120V
15A
GR PRISE DE
TERRE
AC CIRCUIT BREAKER
INTERRUPTEUR DE
COURANT PRINCIPAL
NEUTRAL BONDED TO FRAME
NEUTRE MIS A LA MASSE A
LA CARCASSE DU MOTEUR
211052
120
V
OFF
GAC-2.2H
POWERED by
Honda Engines
120V
15A
GR PRISE DE
TERRE
AC CIRCUIT BREAKER
INTERRUPTEUR DE
COURANT PRINCIPAL
NEUTRAL BONDED TO FRAME
NEUTRE MIS A LA MASSE A
LA CARCASSE DU MOTEUR
211052
120
V
OFF
GAC-2.2H
POWERED by
Honda Engines
120V
15A
GR PRISE DE
TERRE
AC CIRCUIT BREAKER
INTERRUPTEUR DE
COURANT PRINCIPAL
NEUTRAL BONDED TO FRAME
NEUTRE MIS A LA MASSE A
LA CARCASSE DU MOTEUR
211052
NEVER use inside a home
or garage. Even if doors
and windows are open.
ONLY use OUTSIDE and
far away from windows,
doors, and vents.
Generator exhaust contains carbon monoxide. This is
a poison gas you cannot see or smell.
Avoid other generator hazards.
READ MANUAL BEFORE USE.
M90320010
SAFETY DECALS
Safety labels/decals are attached to the generator as shown
in Figure 1. Keep these safety labels clean at all times.
When the safety labels become worn or damaged, contact
your nearest dealer or the Multiquip Parts Dept.
NOTICE
For safety label part numbers, reference parts manual..
Figure 1. Safety Decals

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 5
SAFETY INFORMATION
DO NOT operate or service the generator before reading
the entire manual. Safety precautions should be followed at
all times when operating this generator. Failure to read and
understand the safety messages and operating instructions
could result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others.The
safety messages specifically address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION
or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
Potential hazards associated with the operation of this
generator will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.

PAGE 6 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
SAFETY INFORMATION
GENERAL SAFETY
CAUTION

NEVER operate this generator without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.

NEVER operate this generator when not
feeling well due to fatigue, illness or when
under medication.

NEVER operate this generator under the influence of
drugs or alcohol.

ALWAYS check the generator for loosened threads or
bolts before starting.

DO NOT use the generator for any purpose other than
its intended purposes or applications.
NOTICE

This generator should only be operated by trained and
qualified personnel 18 years of age and older.

Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.

Manufacturer does not assume responsibility for any
accident due to generator modifications. Unauthorized
generator modification will void all warranties.
NEVER use accessories or attachments that are not
recommended by MQ Power for this generator. Damage
to the generator and/or injury to user may result.
ALWAYS know the location of the nearest
fire extinguisher.
ALWAYS know the location of the nearest
first aid kit.
ALWAYS know the location of the nearest
phone or keep a phone on the job site.
Also, know the
phone numbers of the nearest ambulance, doctor
and
fire department.
This information will be invaluable in
the case of an emergency.
GENERATOR SAFETY
DANGER
NEVER operate the generator in an explosive
atmosphere or near combustible materials.An
explosion or fire could result causing severe
bodily harm or even death.
WARNING
NEVER disconnect any
emergency or safety devices.
These devices are intended for operator safety.
Disconnection of these devices can cause severe injury,
bodily harm or even death. Disconnection of any of these
devices will void all warranties.
CAUTION
NEVER
lubricate components or attempt service on a
running machine.
NOTICE
ALWAYS ensure generator is on level ground before use.
ALWAYS
keep the generator in proper running condition.

Fix damage to generator and replace any broken parts
immediately.
ALWAYS
store generator properly when it is not being
used. Generator should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 7
SAFETY INFORMATION
ENGINE SAFETY
DANGER

The engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.

The engine in this generator
requires an adequate free
flow of cooling air. NEVER
operate this generator in
any enclosed or narrow area
where free flow of the air is
restricted. If the air flow is
restricted it will cause injury to people and property and
serious damage to the generator or engine.
WARNING

DO NOT place hands or fingers inside engine
compartment when engine is running.

NEVER operate the engine with heat shields or
guards removed.

Keep fingers, hands hair and clothing away
from all moving parts to prevent injury.

DO NOT remove the radiator cap while the
engine is hot. High pressure boiling water
will gush out of the radiator and severely
scald any persons in the general area of
the generator.

DO NOT remove the coolant drain plug while the engine
is hot. Hot coolant will gush out of the coolant tank and
severely scald any persons in the general area of the
generator.

DO NOT remove the engine oil drain plug while the
engine is hot. Hot oil will gush out of the oil tank and
severely scald any persons in the general area of the
generator.
CAUTION

NEVER touch the hot exhaust manifold,
muffler or cylinder. Allow these parts to cool
before servicing generator.
NOTICE
NEVER
run engine without an air filter or with a dirty air
filter. Severe engine damage may occur. Service air filter
frequently to prevent engine malfunction.
NEVER tamper with the factory settings
of the engine or engine governor. Damage
to the engine or generator can result if
operating in speed ranges above the
maximum allowable.

Wet stacking is a common problem with diesel engines
which are operated for extended periods with light or
no load applied. When a diesel engine operates without
sufficient load (less than 40% of the rated output), it will
not operate at its optimum temperature. This will allow
unburned fuel to accumulate in the exhaust system,
which can foul the fuel injectors, engine valves and
exhaust system, including turbochargers, and reduce
the operating performance.
In order for a diesel engine to operate at peak efficiency,
it must be able to provide fuel and air in the proper ratio
and at a high enough engine temperature for the engine
to completely burn all of the fuel.
Wet stacking does not usually cause any permanent
damage and can be alleviated if additional load is
applied to relieve the condition. It can reduce the system
performance and increase maintenance. Applying an
increasing load over a period of time until the excess
fuel is burned off and the system capacity is reached
usually can repair the condition. This can take several
hours to burn off the accumulated unburned fuel.

State Health Safety Codes and Public Resources
Codes specify that in certain locations, spark arresters
must be used on internal combustion engines that use
hydrocarbon fuels. A spark arrester is a device designed
to prevent accidental discharge of sparks or flames
from the engine exhaust. Spark arresters are qualified
and rated by the United States Forest Service for this
purpose. In order to comply with local laws regarding
spark arresters, consult the engine distributor or the
local Health and Safety Administrator.

PAGE 8 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
SAFETY INFORMATION
FUEL SAFETY
DANGER

DO NOT start the engine near spilled fuel or combustible
fluids. Diesel fuel is extremely flammable and its vapors
can cause an explosion if ignited.

ALWAYS refuel in a well-ventilated area, away from
sparks and open flames.

ALWAYS use extreme caution when working with
flammable liquids.

DO NOT fill the fuel tank while the engine is running
or hot.

DO NOT overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.

Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.

NEVER use fuel as a cleaning agent.

DO NOT smoke around or near the
generator. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
ELECTRICAL SAFETY
DANGER

DO NOT touch output terminals during
operation. Contact with output terminals
during operation can cause electrocution,
electrical shock or burn.

The electrical voltage required to
operate the generator can cause severe
injury or even death through physical contact with live
circuits. Turn generator and all circuit breakers OFF
before performing maintenance on the generator or
making contact with output terminals.

NEVER insert any objects into the output
receptacles during operation. This is
extremely dangerous. The possibility
exists of electrical shock, electrocution
or death.
Backfeed to a utility system can cause electrocution
and/or property damage. NEVER
connect the generator to a building’s
electrical system without a transfer
switch or other approved device. All
installations should be performed by a
licensed electrician in accordance
with all applicable laws and electrical
codes. Failure to do so could result in electrical shock or
burn, causing serious injury or even death.
Power Cord/Cable Safety
DANGER
NEVER let power cords or cables lay in water.
NEVER stand in water
while AC power from the
generator is being transferred to a load.
NEVER use damaged or worn
cables or cords when
connecting generator to generator. Inspect for cuts in the
insulation.
NEVER grab or touch a live power
cord or cable with wet hands. The
possibility exists of electrical shock,
electrocution or death.
Make sure power cables are securely
connected to the generator’s output receptacles.
Incorrect connections may cause electrical shock and
damage to the generator.
NOTICE
ALWAYS
make certain that proper power or extension
cord has been selected for the job. See Cable Selection
Chart in this manual.

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 9
SAFETY INFORMATION
Grounding Safety
DANGER

This generator is equipped with a grounding terminal
attached to the enclosure. Electrical grounding
requirements can differ by State, Province, District,
Municipality, and unique application settings.

For portable and vehicle-mounted generators, Multiquip
recognizes the guidance provided in NEC Handbook
Article 250.34 Parts A and B, and 29 CFR 1926.404
(f) (3) (i). If a more definitive earth-to-ground safeguard
is required, please consult a qualified electrician and
reference appropriate National Electrical Code (NEC)
guidelines in establishing an exterior grounding point
generator.

NEVER use gas piping as an electrical ground.
NOTICE

There is a permanent conductor bond between
generator (stator winding) and the frame.
BATTERY SAFETY
DANGER

DO NOT drop the battery. There is a possibility that the
battery will explode.

DO NOT expose the battery to open flames,
sparks, cigarettes, etc.The battery contains
combustible gases and liquids. If these
gases and liquids come into contact with a
flame or spark, an explosion could occur.
WARNING
ALWAYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
Use well-insulated gloves when picking up the battery.
ALWAYS
keep the battery charged. If the battery is not
charged, combustible gas will build up.
ALWAYS
recharge the battery in a well-ventilated
environment to avoid the risk of a dangerous concentration
of combustible gasses.

If the battery liquid (dilute sulfuric acid) comes into
contact with clothing or skin
, rinse skin or clothing
immediately with plenty of water.

If the battery liquid (dilute sulfuric acid) comes into
contact with eyes
, rinse eyes immediately with plenty
of water and contact the nearest doctor or hospital to
seek medical attention.
CAUTION
ALWAYS disconnect the
NEGATIVE battery terminal
before performing service on the generator.
ALWAYS
keep battery cables in good working condition.
Repair or replace all worn cables.

PAGE 10 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
SAFETY INFORMATION
ENVIRONMENTAL SAFETY/DECOMMISSIONING
NOTICE
Decommissioning is a controlled process used to safely
retire a piece of generator that is no longer serviceable.
If the generator poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain (beyond life-cycle reliability) and is to
be decommissioned (demolition and dismantlement),be
sure to follow rules below.

DO NOT pour waste or oil directly onto the ground, down
a drain or into any water source.

Contact your country's Department of
Public Works or recycling agency in your
area and arrange for proper disposal of
any electrical components, waste or oil
associated with this generator.

When the life cycle of this generator is over, remove
battery(s) and bring to an appropriate facility for lead
reclamation. Use safety precautions when handling
batteries that contain sulfuric acid.

When the life cycle of this generator is over, it is
recommended that the generator frame and all other
metal parts be sent to a recycling center.
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
promotes energy cost savings.
EMISSIONS INFORMATION
NOTICE
The diesel engine used in this generator has been designed
to reduce harmful levels of carbon monoxide (CO),
hydrocarbons (HC) and nitrogen oxides (NOx) contained
in diesel exhaust emissions.
This engine has been certified to meet US EPA Evaporative
emissions requirements in the installed configuration.
Attempting to modify or make adjustments to the engine
emission system by unauthorized personnel without proper
training could damage the generator or create an unsafe
condition.
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fines or other penalties.
Emission Control Label
The emission control label is an integral part of the emission
system and is strictly controlled by regulations.
The label must remain with the engine for its entire life.
If a replacement emission label is needed, please contact
your authorized engine distributor.

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 11
SPECIFICATIONS
Table 1. Generator Specifications
Model DCA125SSIU4F
Type Revolving field, self ventilated,
open protected type synchronous generator
Armature Connection Star with Neutral Zigzag
Phase 3Ø 3Ø
Standby Output 110 kW (137.5 kVA) 79 kW
Prime Output 100 kW (125 kVA) 72 kW
3Ø Voltage (L-L/L-N)
Voltage Selector Switch at 3Ø 240/139 208Y/120, 220Y/127, 240Y/139 N/A
3Ø Voltage (L-L/L-N)
Voltage Selector Switch at 3Ø 480/277 416Y/240, 440Y/254, 480Y/277 N/A
1Ø Voltage (L-L/L-N)
Voltage Selector Switch at 1Ø 240/120 N/A 240/120
Power Factor 0.8 1.0
Frequency 60 Hz
Speed 1800 rpm
Aux. AC Power Single Phase, 60 Hz
Aux. Voltage/Output 4.8 Kw (2.4 kW x 2)
Dry Weight 5,291 lbs. (2,400 kg)
Wet Weight 6.702 lbs. (3,040 kg)
Table 2. Engine Specifications
Model Isuzu BR-4HK1X Final Tier 4
Type Water-cooled, direct injection, turbo-charged
air cooled EGR
No. of Cylinders 4 cylinders
Bore x Stroke 4.52 in. x 4.92 in. (115 mm x 125 mm)
Displacement 317 cu. in. (5.2 liter)
Rated Output 170.8 HP at 1800 rpm
Starting Electric
Coolant Capacity 10.3 gal. (39 liters)1
Lube Oil Capacity 6.05 gal. (22.9 liters)2
Lubricating Type Oil API service class CJ-4 SAE 15W-40
Fuel Type #2 Diesel Fuel (Ultra Low Sulfur Diesel Fuel Only)
Fuel Tank Capacity 169 gal. (640 liters)
DEF Tank Capacity 7.4 gal. (28 liters)
Fuel Consumption 7.1 gal. (26.9 L)/hr at full load 5.6 gal. (21.2 L)/hr at 3/4 load
4.1 gal. (15.5 L)/hr at 1/2 load 2.6 gal. (10.0 L)/hr at 1/4 load
Battery 4D (CCA 0°F 1050A) X 1
1 Includes engine and radiator hoses
2 Includes filters

PAGE 12 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
DIMENSIONS
14,050 lbs.
(6,370 kg)
125
Table 3. Dimensions
Reference
Letter Dimension in. (mm) Reference Letter Dimension in. (mm)
A 30.32 (770) E 37.80 (960)
B 30.32 (770) F 120.08 (3,050)
C 37.80 (960) G 72.83 (1,850)
D 42.52 (1,080) H 48.82 (1,240)
Figure 2. Dimensions

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 13
NOTES

PAGE 14 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
INSTALLATION
GENERATOR
GROUND LUG
GROUND CABLE
REFERENCE
NEC 250-83 (C)
8 FT
./2.4 M (MINIMUM)
IF THE GENERATOR IS PROVIDING
ELECTRIC POWER TO A BUILDING
VIA A TRANSFER SWITCH IT MUST
BE CONNECTED TO A GROUND ROD.
Figure 3. Typical Generator Grounding Application

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 15
INSTALLATION
OUTDOOR INSTALLATION
Install the generator in a area that is free of debris,
bystanders, and overhead obstructions. Make sure the
generator is on secure level ground so that it cannot slide
or shift around. Also install the generator in a manner so
that the exhaust will not be discharged in the direction of
nearby homes.
The installation site must be relatively free from moisture
and dust. All electrical equipment should be protected from
excessive moisture. Failure to do will result in deterioration
of the insulation and will result in short circuits and
grounding.
Foreign materials such as dust, sand, lint and abrasive
materials have a tendency to cause excessive wear to
engine and alternator parts.
INDOOR INSTALLATION
Exhaust gases from diesel engines are extremely
poisonous. Whenever an engine is installed indoors the
exhaust fumes must be vented to the outside. The engine
should be installed at least two feet from any outside wall.
Using an exhaust pipe which is too long or too small can
cause excessive back pressure which will cause the engine
to heat excessively and possibly burn the valves.
MOUNTING
The generator must be mounted on a solid foundation
(such as concrete) and set firmly on the foundation to
isolate vibration of the generator when it is running. The
generator must set at least 6 inches above the floor or grade
level (in accordance to NFPA 110, Chapter 54.1). DO NOT
remove the metal skids on the bottom of the generator.
They are to resist damage to the bottom of the generator
and to maintain alignment.
CAUTION
Pay close attention to ventilation when operating the
generator inside tunnels and caves.The engine exhaust
contains noxious elements. Engine exhaust must be
routed to a ventilated area.
GENERATOR GROUNDING
if applicable ,to guard against electrical shock and possible
damage to the equipment, it is important to provide a good
EARTH ground, (Figure 2).
Article 250 (Grounding) of the NEC handbook provides
guidelines for proper grounding and specifies that the cable
ground shall be connected to the grounding system of the
building as close to the point of cable entry as practical.
NEC article 250 specifices the following grounding
requirements:
1. Use one of the following wire types to connect the
generator to earth ground.
a. Copper 10 AWG (5.3 mm2) or larger.
b. Aluminum 8 AWG (8.4 mm2) or larger.
2. When grounding of the generator (Figure 2) is required,
connect one end the ground cable to the ground lug
on the generator. Connect the other end of the ground
cable to the ground rod (earth ground).
3. NEC article 250 specifies that the earth ground rod
should be buried a minimum of 8 ft. into the ground.
NOTICE
The Occupational Safety and Health Administration
(OSHA) and the National Electrical Code (NEC)
recommend that if the generator is providing electrical
power to a structure (home, office shop, trailer or
similar) it must be connected to a grounding electrode
system, such a driven ground rod (Figure 2).
NOTICE
ALWAYS check with State, Province, District and
Municipalities for electrical grounding requirements
before using generator.
NOTICE
When connecting the generator to any buildings
electrical system ALWAYS consult with a licensed
electrician.

PAGE 16 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
GENERATOR
This generator (Figure 4) is designed as a high quality
portable (requires a trailer for transport) power source for
telecom sites, lighting facilities, power tools, submersible
pumps and other industrial and construction machinery.
OPERATING PANEL
The “Operating Panel” is provided with the following:
ECU 835 Controller
Gauge Unit Assembly
• Oil Pressure Gauge
• Water Temperature Gauge
• Charging Voltmeter
• Fuel Gauge
• Tachometer
Panel Light/Panel Light Switch
Hour Check Button
Auto Start/Stop Switch
Engine Speed Switch
Emergency Stop Switch (Option)
Fuel Leak Detected Alarm Lamp
CONTROL PANEL
The “Control Panel” is provided with the following:
Frequency Meter (Hz)
AC Ammeter (Amps)
AC Voltmeter (Volts)
Ammeter Change-Over Switch
Voltmeter Change-Over Switch
Voltage Regulator
3-Pole, 300 amp Main Circuit Breaker
“Control Box” (Located Behind Control Panel)
• Automatic Voltage Regulator
• Current Transformer
• Over-Current Relay
• Starter Relay
OUTPUT TERMINAL PANEL
The “Output Terminal Panel” is provided with the following:
Three 240/120V output receptacles (CS-6369), 50A
Three auxiliary circuit breakers, 50A
Two 120V output duplex receptacles (GFCI), 20A
Two duplex circuit breakers, 20A
Five output terminal lugs (3Ø power)
Battery Charger (Optional)
Jacket Water Heater (Optional)
OPEN DELTA EXCITATION SYSTEM
Each generator is equipped with the state of the art “Open-
Delta” excitation system. The open delta system consist
of an electrically independent winding wound among
stationary windings of the AC output section.
There are four connections of the open delta A, B, C and
D. During steady state loads, the power from the voltage
regulator is supplied from the parallel connections of A to
B, A to D, and C to D. These three phases of the voltage
input to the voltage regulator are then rectified and are the
excitation current for the exciter section.
When a heavy load, such as a motor starting or a short
circuit occurs, the automatic voltage regulator (AVR)
switches the configuration of the open delta to the series
connection of B to C. This has the effect of adding the
voltages of each phase to provide higher excitation to the
exciter section and thus better voltage response during the
application of heavy loads.
The connections of the AVR to the AC output windings are
for sensing only. No power is required from these windings.
The open-delta design provides virtually unlimited excitation
current, offering maximum motor starting capabilities. The
excitation does not have a “fixed ceiling” and responds
according the demands of the required load.
ENGINE
This generator is powered by a 4 cylinder, 4-cycle water
cooled, direct injection, turbocharged, air cooled EGR
ISUZU BR-4HK1X diesel engine. This engine is designed
to meet every performance requirement for the generator.
Reference Table 2 for engine specifications.
In keeping with MQ Power’s policy of constantly improving
its products, the specifications quoted herein are subject
to change without prior notice.
ELECTRIC GOVERNOR SYSTEM
The electric governor system controls the RPMs of the engine.
When the engine demand increases or decreases, the
governor system regulates the frequency variation to ±.25%.
EXTENSION CABLES
When electric power is to be provided to various tools or
loads at some distance from the generator, extension cords
are normally used. Cables should be sized to allow for
distance in length and amperage so that the voltage drop
between the generator and point of use (load) is held to
a minimum. Use the cable selection chart (Table 6) as a
guide for selecting proper extension cable size.
GENERAL INFORMATION

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 17
MAJOR COMPONENTS
125
125
1
2
6
5
8
9
11
12
13
14
7
15
18
3 4
10
PSI
OIL PRESS
0
25 50 75
100 °F
WATER TEMP
100
140 180 220
260 VOLTS
BATTERY
6
12 18 24
30
°F
FUEL
E
½
FRPMX10
SPEED
0
120 150 180
210
60
INCREASE DECREASE
OFF
V
W
U
OFF
U-V W-U
V-W
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
16
17
Table 4. Generator Major Components
ITEM NO. DESCRIPTION
1 DOC/SCR Assembly
2DEF Tank Assembly
3 Coolant Drain Plug
4Oil Drain With Valve
5Fuel Tank Assembly
6 Battery Assembly
7 Air Filter Assembly
8 Voltage Selector Switch Assembly
9 Output Terminal Panel Assembly
10 Emergency Stop Switch (Option)
11 Generator Assembly
12 Engine Assembly
13 DEF Supply Module Assembly
14 Muffler Assembly
15 Generator Operating Panel Assembly
16 Gauge Unit Assembly
17 Auto Start/Stop Controller Assembly
18 Main Circuit Breaker Assembly
Figure 4. Major Components

PAGE 18 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
ENGINE CONTROL UNIT (ECU)
Figure 5. Engine Control Unit (ECU)
PSI
OIL PRESS
0
25 50 75
100 °F
WATER TEMP
100
140 180 220
260 VOLTS
BATTERY
6
12 18 24
30
°F
FUEL
E
½
FRPMX10
SPEED
0
120 150 180
210
60
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
OFF
U-V W-U
V-W
OFF
V
W
U
INCREASE DECREASE
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
A
B
C
D
E F GH
1
The definitions below describe the controls and functions
of the Engine Control Unit (Figure 5).
1. ECU Controller — This auto start/stop controller
displays the parameters and the diagnostic
troubleshooting messages of the engine.
A. ECU Display Screen — Engine fault diagnostic
messages are shown on this LCD display. screen
B. Engine Started Lamp — This lamp when lit
indicates engine is operating normally.
C. Engine Shutdown Lamp — When an engine
failure has occured this lamp will blink. Indicating
the engine has been shutdown. The diagnostic
fault message will be displayed on the LCD screen.
D. Pre Alarm Lamp — When an engine failure has
occured this lamp will blink. Indicating a pre-fault
engine condition and the possibility of engine
shutdown.The diagnostic fault message will be
displayed on the LCD screen
E. Alarm Acknowledge Button — When the engine
experiences a fault, the "Pre Alarm Lamp" or the
"Shutdown Lamp" will start blinking. Pushing this
button will confirm the fault message and the
blinking lamp will change to a solid lamp display.
The fault message will be displayed on the screen.
When multiple engine faults occur, the lamp will
continue blinking until all fault messages are
confirmed.The blinking lamp will change to a solid
lamp display all current confirmed fault messages
will scrool across the screen.
F. Screen Change Button — When this button is
pushed during operation, the screen will cycle
through each parameter screen.
G. Option Button — This button is not active. Do
not use.
H. Program/Exit Button — Push this button from the
home screen to enter the main menu.

DCA125SSIU4F 60 HZ GENERATOR• OPERATION MANUAL — REV. #0 (07/20/17) — PAGE 19
ENGINE/GENERATOR CONTROL PANEL
The definitions below describe the controls and functions
of the Engine/Generator Control Panel (Figure 6).
1. Gauge Unit Assembly — This assembly houses the
various engine monitoring gauges. These gauges
indicate: oil pressure, water temperature, charging
voltmeter, fuel and engine speed RPM (tachometer).
A. Oil Pressure Gauge — During normal operation
this gauge be should read between 42.1~85.6 psi.
(290~590 kPa). When starting the generator the
oil pressure may read a little higher, but after the
engine warms up the oil pressure should return to
the correct pressure range.
B. Water Temperature Gauge — During normal
operation this gauge be should read between 167°
and 194°F (75°~90°C).
C. Charging Voltmeter Gauge — During normal
operation this gauge indicate minimum 12.5~14
VDC.
D. Fuel Gauge — Indicates amount of diesel fuel
available.
E. Tachometer — Indicates engine speed in RPM’s
for 60 Hz operation. This meter should indicate
1800 RPM’s when the rated load is applied.
2. Panel Light — For operation at night, panel light
illuminates control panel for ease of reading meters
and gauges. Make sure panel light switch is in the OFF
position when light is not in use.
3. Panel Light Switch — When activated will turn on
control panel light.
PSI
OIL PRESS
0
25 50 75
100 °F
WATER TEMP
100
140 180 220
260 VOLTS
BATTERY
6
12 18 24
30
°F
FUEL
E
½
FRPMX10
SPEED
0
120 150 180
210
60
D
AB C
E
1
PSI
OIL PRESS
0
25 50 75
100 °F
WATER TEMP
100
140 180 220
260 VOLTS
BATTERY
6
12 18 24
30
°F
FUEL
E
½
FRPMX10
SPEED
0
120 150 180
210
60
11
13
INCREASE DECREASE
8
OFF
V
W
U
OFF
U-V W-U
V-W
10
Series 800 Controller
ECU
Engine Started
Shutdown
Pre-Alarm
Alarm
Acknowledge
Screen
Change
Program
Exit
Option
12
6
7
9
5
14
24
3
Figure 6. Gauge Unit Assembly
4. Fuel Leak Detected Alarm Lamp — This lamp when
ON indicates that fluids in the containment area have
reach a high level.
5. Frequency Meter — Indicates the output frequency
in hertz (Hz). Normally 60 Hz.
6. AC Ammeter — Indicates the amount of current the
load is drawing from the generator per leg selected by
the ammeter phase-selector switch.
7. AC Voltmeter — Indicates the output voltage present
at the U,V, and W Output Terminal Lugs.
8. Voltage Regulator Control — Allows ±15% manual
adjustment of the generator’s output voltage.
9. Ammeter Change-Over Switch — This switch allows
the AC ammeter to indicate the current flowing to the load
connected to any phase of the output terminals, or to be
switched off. This switch does not effect the generator
output in any fashion, it is for current reading only.
10. Voltmeter Change-Over Switch — This switch allows
the AC voltmeter to indicate phase to phase voltage
between any two phases of the output terminals or to
be switched off.
11. Hour Check Button — With the engine stopped, press
and hold ths button.The total running hours, fuel level,
and battery voltage will be displayed.
12. Auto/Start Switch — This switch selects either manual
or automatic operation. Center position is OFF (reset).
13. Engine Speed Switch — This switch controls
thespeed of the engine low or high.
14. Main Circuit Breaker — This three-pole, 200 amp
main breaker is provided to protect the U,V, and W
output terminal lugs from overload.

PAGE 20 — DCA12SSIU4F 60 HZ GENERATOR • OPERATION MANUAL — REV. #0 (07/20/17)
OUTPUT TERMINAL PANEL FAMILIARIZATION
OUTPUT TERMINAL PANEL
The Output Terminal Panel (Figure 7) shown below is
provided for the connection of electrical loads. Lift up on
the cover to gain access to receptacles and terminal lugs.
NOTICE
Terminal legs “O” and “Ground” are considered bonded
grounds
OUTPUT TERMINAL FAMILIARIZATION
The “Output Terminal Panel” (Figure 7) is provided with
the following:
Three (3) 240/139V output receptacles @ 50 amp
Three (3) Circuit Breakers @ 50 amps
Two (2) 120V GFCI receptacles @ 20 amp
Two (2) Duplex Circuit Breakers @ 20 amp
Five (5) Output Terminal Lugs (U, V, W, O, Ground)
AUX. POWER RECEPTACLES
240/120V, 50 AMPS
120 VAC, 20 AMP
GFCI RECEPT
ACLES
Y
X
W
CS-6369
TWIST-LOCK
CIRCUIT BREAKERS
FOR GFCI RECEPTACLES
RECEPTACLE
AND
CIRCUIT BREAKER
PANEL
ACCESS DOOR
LIFT TO OPEN
HARD WIRE
HOOKUP PANEL
O
UVW
BLACK RED BLUE WHITE GREEN
1Ø AND 3Ø,
480 -120 VAC
OUTPUT TERMINALS
NEUTRAL
TERMINAL
GROUND
TERMINAL
CIRCUIT BREAKERS
FOR CS-6369 TWIST
LOCK RECEPTACLES
Figure 7. Output Terminal Panel