Mebay DC4 D MK3 Series User manual

DC4xD MK3
GENSET CONTROLLER
USER MANUAL
DC40D MK3
DC42D MK3

DC4xD MK3 GENSET CONTROLLER USER MANUAL
1
Software Version
No.
Version
Date
Note
1
V1.0
2020-07-09
Original release.
2
V1.7
2019-4-2
1.Optimization of over current inverse time
function.
2.Add over current fault delay function.
3.Add 6 kinds of oil pressure sensor curve.
4.Add high speed control function.
3
V1.9
2019-8-22
1.Increase RS485 communication baud rate
setting.
2.Add CRC setting of RS485 communication.
4
V2.0
2020-8-1
1.Add "fuel output delay" setting function.
2.Configurable relay output increases "rated
operation output".
3.Add "manual gear automatic closing"
setting option.
5
V2.1
2021-2-1
1.Name of unified input and output port.
2. Add the language function of "Turkish";
3. Increase the setting of "load pulse width"
and "unload pulse width";
4. The relay function adds "unload control";
5. The temperature sensor curve is "465";
6.Add "YD-001 (10-180)" to the oil level
sensor curve;
Chongqing Mebay Technology Co.,Ltd
Add: No6-2,Building 4, Gangan Rd, Jiangbei District, Chongqing.
Tel：[phone]
Fax：[phone]
Web：http://www.mebay.cn
http://www.cqmb.cn
E_mail：[email protected]

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Symbol Description
Symbol
Description
Note
Remind operators to operate correctly, otherwise it may cause
the equipment not to work correctly.
Be care
It is indicated that potential hazards can damage equipment
without proper precautions.
Warning
It is indicated if appropriate preventive measures are not taken,
potentially dangerous situations may result in death, serious
personal injury or significant property losses.

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Warning
1.The installation of this equipment must be carried out by professionals.
2.When installing and operating the controller, please read the entire instruction
manual first.
3.Any maintenance and commissioning of the equipment must be familiar with all the
equipment.
4.t, safety standards and precautions in advance, otherwise it may cause personal
injury or damage to related equipment.
5.The engine must have an overspeed protection device independent of the
controller system to avoid casualties or other damage caused by engine out of
control.
6.After the installation of the controller is completed, please verify that all protection
functions are valid.
Be Care
1.Please keep the good connection of the power supply of the controller. Do not
share the connection lines of the positive and negative electrodes of the battery
with the floating charger.
2.During the operation of the engine, do not disconnect the battery, otherwise it may
cause damage to the controller.

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Catalogue
1. Summary............................................................................................................................... 5
2. Main Features...................................................................................................................... 5
3. Parameters Display............................................................................................................. 6
4. Protection.............................................................................................................................. 6
5. Parameters........................................................................................................................... 7
6. Overall Dimension and Wiring Diagram........................................................................... 8
7. Installation instruction....................................................................................................... 16
8. Panel and display.............................................................................................................. 17
9. Control and operation instruction.................................................................................... 19
10. Warnings and Shutdown Alarms.................................................................................. 22
11. Parameters setting.......................................................................................................... 29
12. Fault finding......................................................................................................................29
Notes:
1. All rights reserved. No part of this duplication may be reproduced in any material
form (including photocopying or storing in any medium by electronic means or others)
without the written permission of the copyright holder.
2. MEBAY Technology reserves the rights to change the contents of this document
without prior notice.

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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1.Summary
This series controller is specialized for Diesel / Gasoline / Gas Genset Start,
Stop, Parameters monitoring, faults-checking as well as data setting.
3.0 inch LCD screen display with brand new UI design is adapted in this
controller that the relative failures can be displayed directly. All the parameters can
be displayed by simulated indicators and words. Besides, LCD screen can display
various faults in the same time that the genset will be stopped once it can’t work
smoothly.
There are Chinese/English interface options, more language can be set
according to user’s request. All the parameters can be configured through the front
face buttons or use programmable interface by RS485 or USB to adjust via PC. It can
be widely applied for all kinds of auto control system of gensets.
2.Main Features
There are four Models under DC4xD MK3 series.
DC40D MK3: used for single machine automation. Start/Stop through remote
start signal.
DC42D MK3: Based on DC40D MK3, it adds Mains monitoring and AMF
(Mains/Generator automatic switching control), especially suitable for the automation
system composed by mains and genset.
DC40DR MK3: Based on DC40D MK3, it adds RS485 port.
DC42DR MK3: Based on DC42D MK3, it adds RS485 port.
DC42DR- MK3: Based on DC42DR MK3, it adds ABF backup battery pack
detection and generator set control functions.
Dual core 32bit high performance single chip microcomputer.
3.5 inch 128 * 64 high-resolution LCD screen, Available in 5 languages, user’s
language set if necessary.
Indicator and number display through UI surface.
Various of crank conditions (RPM, Frequency, Oil Pressure) can be chosen.
Various kinds of parameters display.
Adapt to 3P4W,1P2W,2P3W(120V/240V,50/60HZ)
Sensor can be self-defined by front face button or PC software.
With RS485 communication port, can achieve “Three Remote” functions via
MODBUS protocol.
USB Port: parameters can be set even without power through USD port to monitor
in real time.
Input/output function, status can be shown directly.
More categories of surface setting.
Real time clock inside: preset time operate and auto maintenance is available.
Genset working plan can be set as per week or month.
Maintenance countdown function, can set maintenance time or date.
The black box function can save the relevant parameters of the unit when the fault
alarm occurs in real time, and it is convenient to find the cause of the fault.

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Totally 6 relay’s output, among which 4 relay output can be self-configurable, each
relay can be set as max 20 functions, besides, there are 2 groups as non-contact
terminals.
With 5 switches input, up to 40 functions optional;
3 sensor simulation input connectors,and various display units can be configured.
Standard water-proof rubber gasket. The waterproof can reach IP54.
Module design: All the connections are adapted with European connectors so that
installation, connection, repair and replacement can be more easily.
Control Protection: Auto Start/Stop of genset, load transfer (ATS control) and
perfect failure display and protection.
3.Parameters Display
Engine RPM
Engine oil pressure
Engine water temperature
Engine fuel temperature
Engine cylinder temperature
Engine Tank temperature
Engine fuel level
Engine battery voltage
Charging voltage
UPS voltage(only for DC42DR-ABF MK3)
Mains phase voltage L-N (only for DC42D MK3)
Mains phase voltage L-L (only for DC42D MK3)
Generator 3 Phase voltage L-N
Generator 3 Phase voltage L-L
Generator 3 phase current A
Generator Frequency Hz
Generator Power Factor COS φ
Generator active power KW
Generator apparent power KVA
Generator reactive power KVar
Current consumption KWH
Total consumption KWH
Total Crank times
Current running time
Total running time
Maintenance notice
Input status display
Output status display
Current date and time;
4.Protection
Over speed

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Under speed
Low oil pressure
High water temperature
High Oil temperature
High Cylinder Temperature
High Tank temperature
Low fuel level
Low oil level
External instant unloading shutdown
External emergency alarm
RPM Lost
Sensor Open
Over Frequency
Under Frequency
Over voltage
Under voltage
Over current
Non-balance of current
Over power
Maintenance expire
Low water level alarm
Emergency Stop
Crank failure
Battery over voltage
Battery under voltage
The charger fails to charge
Charger charging failure
Stop Failure
5.Parameters
Options
Parameters
Working voltage
DC8V---36V Continuous
Power consumption
Standby：24V：MAX 1W
Working：24V：MAX 5W
AC Voltage Input
1P2W 30VAC-300VAC (ph-N)
2P3W 30VAC-300VAC (ph-N)
3P4W 30VAC-300VAC (ph-N)
Rotate speed sensor
Frequency
50-9000Hz
MAX Accumulating Time
99999.9Hours（Min Store time:6min）
Fuel Relay Output
Max 5Amp DC+VE Supply voltage
Start Relay Output
Max 5Amp DC+VE Supply voltage
AUX. OUTPUT1
Max 5Amp DC+VE Supply voltage
AUX. OUTPUT2
5AMP Non-contact normal open&normal close output
AUX. OUTPUT3
5AMP Non-contact normal open output

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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AUX. OUTPUT4
5AMP Non-contact normal open output
Excitation output
Max 1AMP DC+VE supply voltage
Switch value input
Available if connecting with Battery -
Working condition
-25-65℃
Storage condition
-40-85℃
Protection Level
IP54：when waterproof rubber gasket is added
between controller and its panel
Insulation strength
Apply AC2.2kV voltage between high voltage terminal
and low voltage terminal; The leakage current is not
more than 3mA within 1min.
Overall dimension
210mm*160mm*50mm
Panel cutout
186mm*142mm
Weight
0.9Kg
6.Overall Dimension and Wiring Diagram
Overall Dimension:
189mm
134mm

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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Descriptions of terminal connection
No.
Function
Description
Cable
cross
sectional
area
1
Battery Negative Input B-
Controller power supply input B-.
2.5mm2
2
Battery Negative Input B+
Controller power supply input B+.
2.5mm2
3
Emergency Stop Input
B+ voltage input is active, and connected
to emergency stop normal closed button.
2.5mm2
4
Fuel Output
+VE output, Max 16Amp
1.5mm2
5
Crank Output
+VE output, Max 16Amp.
1.5mm2
6
AUX. OUTPUT1
+VE output, Max 5Amp.
1.5mm2
7
AUX. OUTPUT2
+VE output, Max 5Amp.
1.5mm2
8
AUX. OUTPUT3 Normal open
Passive Output, Max 5Amp
1.5mm2
9
AUX. OUTPUT3 Normal open
1.5mm2
10
AUX. OUTPUT4 Normal open
Passive Output, Max 5Amp
1.5mm2

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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11
AUX. OUTPUT4 Normal open
1.5mm2
12
Charging excitation output
+VE output, Max 0.9Amp.
1.0mm2
13
Aux. Input 1
The grounding is valid according to the
function selection switch input.
1.0mm2
14
Aux. Input 2
1.0mm2
15
Aux. Input 3
1.0mm2
16
Aux. Input 4
1.0mm2
17
Aux. Input 5
1.0mm2
18
Speed sensor -
Use a shielded wire to connect the
speed sensor.
1.0mm2
19
Speed sensor +
1.0mm2
20
Temperature Sensor
Connect sensor input.
1.0mm2
21
Oil pressure sensor
1.0mm2
22
Fuel level sensor
1.0mm2
23
Sensor common GND
Connect the battery negative or outer.
1.0mm2
24
Mains Voltage L1
Connected to the mains L1 phase.
1.0mm2
25
Mains Voltage L2
Connected to the mains L2 phase.
1.0mm2
26
Mains Voltage L3
Connected to the mains L3 phase.
1.0mm2
27
Mains Voltage N
Connected to the mains N phase.
1.0mm2
28
Generator Voltage L1
Connected to the generator L1 phase.
1.0mm2
29
Generator Voltage L2
Connected to the generator L2 phase.
1.0mm2
30
Generator Voltage L3
Connected to the generator L3 phase.
1.0mm2
31
Generator Voltage N
Connected to the generator N phase.
1.0mm2
32
Load CT Secondary L1
Current Transformer Secondary Rated
5A.
1.5mm2
33
Load CT Secondary L2
1.5mm2
34
Load CT Secondary L3
1.5mm2
35
Load CT Secondary ICOM
Connect to the common.
1.5mm2
36
GND
Connect to the common ground wire.
1.5mm2
SC
R
RS485 B
A 120 Ω shielded wire and good
grounding are recommended.
1.0mm2
B
RS485 A
1.0mm2
A
RS485 SCR
1.0mm2
+
UPS battery pack positive
Connected to the can communication
port of ECU.
1.0mm2
-
UPS battery pack negative
1.0mm2

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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DC40D MK3 3-phase 4-wire Typical Wiring Diagram
Note: Please don’t move battery during running status or it may cause the
controller broken!
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.
GEN CURRENT GEN VOLTS
BATTERY FUSE 10 A
FUSE 20 A FUEL CRANK
BATTERY NEGATIVE MUST BE GROUNDED
SWITCH
AUX. OUTPUT 3 AUX. OUTPUT 4
ALT
(AC0-6A)
SENDER COMMON AUX. SENSOR 1_OIL PRESSURE AUX. SENSOR 2_COOLANT TEMP AUX. SENSOR 3
AUX. OUTPUT 1 AUX. OUTPUT 2
AUX. INPUT 1_HIGH COOLANT TEMP ALARM AUX. INPUT 2_LOW OIL PRESSURE ALARM AUX. INPUT 3_REMOTE START AUX. INPUT 4_LOW FUEL LEVEL WARNING AUX. INPUT 5_LOW COOLANT LEVEL ALARM
EMERGENCY
STOP
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
TO LOAD SWITCHING
DEVICE
14
13 19
5
4
3
2
1
30
L3
2928
L2L1
34
L2
31
N
3332 9
L1 L3 COM
23 6
2625
24 27
7
WL
10
35 8
15
12 18
11
16 17 20 21 22
P1 P2
S1S2
P1 P2
S1S2
P1 P2
S1S2
36
MODEL: DC40D MK3
+VE
RS485
RS485_SCR RS485_B RS485_A
SCR B A
+
-
MPU
DC 8-36V
+
-
MAX 5A
MAX 5A
1.No. 23 common sensor lines must be
securely attached to the vicinity of the sensor
body.
2.To ensure reliable operation of the module
and the measuring accuracy, power lines as
much as possible and do not share power
cable crude and other devices.
REMARK:
INPUTS INPUTS
L1
L2
L3
N
(AC30-300V)

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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DC42D MK3 3-phase 4-wire Typical Wiring Diagram
Note: Please don’t move during running status or it may cause the
controller broken!
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.
FUSE 2 A FUSE 2 A
GEN CURRENT GEN VOLTS
BATTERY FUSE 10 A
FUSE 20 A FUEL CRANK
BATTERY NEGATIVE MUST BE GROUNDED
SWITCH
AUX. OUTPUT 3 AUX. OUTPUT 4
ALT
(AC0-6A)
SENDER COMMON AUX. SENSOR 1_OIL PRESSURE AUX. SENSOR 2_COOLANT TEMP AUX. SENSOR 3
AUX. OUTPUT 1 AUX. OUTPUT 2
AUX. INPUT 1_HIGH COOLANT TEMP ALARM AUX. INPUT 2_LOW OIL PRESSURE ALARM AUX. INPUT 3_REMOTE START AUX. INPUT 4_LOW FUEL LEVEL WARNING AUX. INPUT 5_LOW COOLANT LEVEL ALARM
EMERGENCY
STOP
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
FROM MAINS
TO LOAD SWITCHING
DEVICE
MECHANICAL INTERLOCK
14
13 19
5
4
3
21
30
W
2928
V
U
34
L2
31
N2
3332 9
L1 L3 COM
23 6
26
T
25
24
SR
27
N1
7
WL
10
35 8
15
12 18
11
16 17 20 21 22
P1 P2
S1S2
G M
P1 P2
S1S2
P1 P2
S1S2
U
V
W
N2
R
S
T
N1
L1 L2 L3 N
36
MODEL: DC42D MK3
+VE
RS485
RS485_SCR RS485_B RS485_A
SCR B A
+
-
MPU
DC 8-36V
+
-
MAX 5A
MAX 5A
1.No. 23 common sensor lines must be
securely attached to the vicinity of the sensor
body.
2.To ensure reliable operation of the module
and the measuring accuracy, power lines as
much as possible and do not share power
cable crude and other devices.
REMARK:
INPUTS INPUTS
MAIN VOLTS
(AC30-300V) (AC30-300V)

DC4xD MK3 GENSET CONTROLLER USER MANUAL
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DC42DR-ABF MK3 3-phase 4-wire Typical Wiring Diagram
Note: Please don’t move during running status or it may cause the
controller broken!
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.
FUSE 2 A FUSE 2 A
GEN CURRENT GEN VOLTS
BATTERY FUSE 10 A
FUSE 20 A FUEL CRANK
BATTERY NEGATIVE MUST BE GROUNDED
SWITCH
AUX. OUTPUT 3 AUX. OUTPUT 4
ALT
(AC0-6A) (AC30-300V)
SENDER COMMON AUX. SENSOR 1_OIL PRESSURE AUX. SENSOR 2_COOLANT TEMP AUX. SENSOR 3
AUX. OUTPUT 1 AUX. OUTPUT 2
AUX. INPUT 1_HIGH COOLANT TEMP ALARM AUX. INPUT 2_LOW OIL PRESSURE ALARM AUX. INPUT 3_REMOTE START AUX. INPUT 4_LOW FUEL LEVEL WARNING AUX. INPUT 5_LOW COOLANT LEVEL ALARM
EMERGENCY
STOP
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
FROM MAINS
TO LOAD SWITCHING
DEVICE
MECHANICAL INTERLOCK
14
13 19
5
4
3
21
30
W
2928
V
U
34
L2
31
N2
3332 9
L1 L3 COM
23 6
26
T
25
24
SR
27
N1
7
WL
10
35 8
15
12 18
11
16 17 20 21 22
P1 P2
S1S2
G M
P1 P2
S1S2
P1 P2
S1S2
U
V
W
N2
R
S
T
N1
L1L2L3 N
36
MODEL: DC42DR-ABF MK3
+VE
RS485
RS485_SCR RS485_B RS485_A
SCR B A
+-
5-60VDC
UPS
+
-
UPS UPS
+
-
MPU
DC 8-36V
+
-
MAX 5A
MAX 5A
1.No. 23 common sensor lines must be
securely attached to the vicinity of the sensor
body.
2.To ensure reliable operation of the module
and the measuring accuracy, power lines as
much as possible and do not share power
cable crude and other devices.
REMARK:
INPUTS INPUTS
MAIN VOLTS
(AC30-300V)

DC4xD MK3 GENSET CONTROLLER USER MANUAL
14
DC40D MK3 1-phase 2-wire Typical Wiring Diagram
DC40D MK3 2-phase 3-wire Typical Wiring Diagram
30
L3
2928
L2L1
34
L2
31
N
3332 9
L1 L3 COM
2625
24 27
10
35 811
P1 P2
S1S2
L1
N
36
MODEL: DC40D MK3
(AC0-6A)
1 PHASE 2 WIRE
GEN CURRENT GEN VOLTS
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
TO LOAD SWITCHING
DEVICE
AUX. OUTPUT 3 AUX. OUTPUT 4
(AC30-300V)
30
L3
2928
L2L1
34
L2
31
N
3332 9
L1 L3 COM
2625
24 27
10
35 811
P1 P2
S1S2
P1 P2
S1S2
L1
L2
N
36
(AC0-6A)
MODEL: DC40D MK3 2 PHASE 3 WIRE
GEN CURRENT GEN VOLTS
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
TO LOAD SWITCHING
DEVICE
AUX. OUTPUT 3 AUX. OUTPUT 4
(AC30-300V)

DC4xD MK3 GENSET CONTROLLER USER MANUAL
15
DC42D MK3 1-phase 2-wire Typical Wiring Diagram
DC42D MK3 2-phase 3-wire Typical Wiring Diagram
30
W
2928
V
U
34
L2
31
N2
3332 9
L1 L3 COM
26
T
25
24
SR
27
N1
10
35 811
P1 P2
S1S2
G M
U
N2
R
N1
L1 N
36
MODEL: DC42D MK3 1 PHASE 2 WIRE
FUSE 2 A FUSE 2 A
GEN CURRENT GEN VOLTS
(AC0-6A)
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
FROM MAINS
TO LOAD SWITCHING
DEVICE
MECHANICAL INTERLOCK
MAIN VOLTS
AUX. OUTPUT 3 AUX. OUTPUT 4
(AC30-300V) (AC30-300V)
30
W
2928
V
U
34
L2
31
N2
3332 9
L1 L3 COM
26
T
25
24
SR
27
N1
10
35 811
P1 P2
S1S2
G M
P1 P2
S1S2
U
V
N2
R
S
N1
L1 L2 N
36
MODEL: DC42D MK3 2 PHASE 3 WIRE
FUSE 2 A FUSE 2 A
GEN CURRENT GEN VOLTS
(AC0-6A)
FROM GENERATOR
CTs MUST BE 5 AMP SECONDARY
FROM MAINS
TO LOAD SWITCHING
DEVICE
MECHANICAL INTERLOCK
MAIN VOLTS
AUX. OUTPUT 3 AUX. OUTPUT 4
(AC30-300V) (AC30-300V)

DC4xD MK3 GENSET CONTROLLER USER MANUAL
16
7.Installation instruction
The controller is fixed by four special fixing members and screws, and the screws
of the metal fasteners cannot be too tight.
Panel Cutout: W160mm*H120mm.
Note: If the controller is installed directly in the genset shell or other fluctuated
equipment, the rubber pad must be installed.
Battery Voltage Input
DC4xD MK3 controller is suitable for 8-36V DC battery voltage. Battery negative
must be reliably connected to the enclosure of the engine. The controller power
supply B+ and B- must be connected to battery positive and negative, and the wire
size must not be less than 2.5mm2.
NOTE:
In case of floating charger connect charger output to battery positive and negative
directly, then, connect battery positive and negative poles to controller positive and
negative power supply.
Output and relay expansion
Note: All outputs of the controller are relay contacts. The maximum current
capacity is described in the "Parameters" in this manual. Please use it in the relay
current capacity. If an extended relay is needed, add a continuous current diode
(when the extended relay coil is DC) or a resistance-capacitance loop (when the
extended relay coil is AC) to both ends of the coil to prevent interference with the
controller or other equipment.
AC current input
Current transformer with rated secondary current 5A must be externally connected
to the controller current input.

DC4xD MK3 GENSET CONTROLLER USER MANUAL
17
WARNING: When generator is on-load, C. T. secondary must not be open
circuit, Otherwise, the high voltage generated will pose a danger to personal safety.
Withstanding voltage test
If withstanding voltage test is conducted after the controller has already been
installed onto the control panel, please unplug all controller terminal connections in
order to prevent high voltage from damaging it.
8.Panel and display
DC40D MK3
DC42D MK3
Gens on load
Alarm records
LED test/Alarm clear
Page change
Mains on load
Load transfer
Gens normal
Gens normal
LED indication
Remote start
Rated running
High water
Temperature
Low oil pressure
Stop mode
Manual mode
Manual start
Auto mode
Alarm indicator
LCD
Close/Open
Page change
Gens normal
LCD
LED indication
Remote start
Rated running
High water
Temperature
Low oil pressure
Stop mode
Manual mode
Manual start
Auto mode
On load indication
Alarm records
LED test/Alarm clear
Alarm indicator

DC4xD MK3 GENSET CONTROLLER USER MANUAL
18
Key Function Description
KEYS
NAME
Main Function
Stop
Reset
—
Can stop generator under manual/auto mode.
Can reset shutdown alarm.
During stop procession,pressing this key again can
stop generator immediately.
Pressing this key can turn into the next digit or
decrease the number under edition mode.
Choose alarm records under records checking mode.
Start
Shift to the
righe
Start the genset under manual mode.
Start the genset under the test mode.
Pressing this key can make the digit turn into right
position.
Manual
Confirm
Pressing this key will set the module into manual
mode
Set the parameter under edition mode.
Confirm the alarm record under records checking
mode and turn into records history checking page.
Auto
＋
Pressing this key will set the module into auto mode.
Pressing this key can turn into the previous page or
increase the number under edition mode.
Choose alarm records under records checking mode.
DC40D MK3
Alarm record
Alarm records checking under stop mode.
Alarm records checking and exit if pressing again.
DC42D MK3
TEST
Pressing this key to come into manual test mode.
Press Manual start key, genset will come into start
under test mode and supply power if running normally in
order to check if the auto start procession is OK.
Page
ESC
Page change.
ESC function under edition mode.
ESC function under alarm records checking.
LED test
Alarm clear
Check if all the LED are ok,Press this button to light all
LED lights, and LED will be extinguished after loosening
the key.
In the warning status, press this button to cancel the
warning relay output, and the controller detects the
warning again.
In the alarm status, pressing this button can cancel
the buzzer's ringing.
In standby status, press this button continuously for 3
seconds, the buzzer ringing can be cancelled, and press
this button for 3 seconds longer, the buzzer ringing can
be restored.
DC40D MK3
Load on/off
Pressing this key to control the load on or off.
DC42D MK3
Load transfer
Pressing this key to transfer the load from Mains and
genset under Manual mode .

DC4xD MK3 GENSET CONTROLLER USER MANUAL
19
+
Setting Mode
Pressing “Page” and “Stop”simultaneously to come
into setting mode.
+
DC42D MK3
Alarm record
Press load-transfer key and page key to check the
alarm records under stop mode.
In the view of the alarm record mode, exit to view the
alarm record.
Alarm records checking
DC4xD MK3 controller can save three group of alarm records which contains
time, voltage, current and oil pressure,temperature etc.
How to check the alarm records:
1）Under stop mode: Press to come into alarm records page(DC40D MK3);
press and simultaneously to come into alarm records page(DC42D MK3).
2）Press to turn upper digit and press to turn lower digit in order to choose
the record you need. Press to confirm the record and come into history records
checking page.
3）Press to turn lower records under records checking page. Press to turn
upper records and press to revert back to alarm history records page.
4）In the history records page and checking page, for DC40D MK3: press to exit;
for DC42D MK3, press and simultaneously to exit.
9.Control and operation instruction
Manual test mode: (only DC42D MK3 has this function)
Press and make sure it is in the stop position before starting.
Press “ ” and the test file indicator is on. At this time, it is detected whether the
connection of each sensor is normal. If the sensor is open, the sensor opens an
alarm. If it is normal, the unit start process is executed in the following sequence after
pressing the " ". automatically switch to Generator provide the power when the
unit is running normally. Press “ ” The controller performs the parking process at
the following timing:
0RPM
Idle
Rated speed
Pre-
heat
delay
5S
Long-
est
pre-oil
supply
delay
0S
Start
Crank
delay
2S 8S
Safe
time
8S
Start
idle
time
5S
Longest
speed
increasing
time
120S
Idle
Rated speed
Pre-
heat
delay
Longest
temperature
increasing
time
10S
Longest
voltage
built/
increasing
time
120S 10S
rated
runn-
ing
Cooling
running time
30S
Stop
idle
time
5S
ETS
solen-
oid
hold
10S
Wait
Stop
30S
warming
up time
Crank
test
time