Lofa MSS-200 Owner's manual

MSS-200
PROGRAMMING MANUAL

1
Page Contents
1 MSS-200 Specifications, And Options
2 Important Warnings (Read First)
3 MSS-200 Basic Programming Information
7 MSS-200 Programming Quick Reference Table
11 Entering Pass Code
12 Quick Reference “LED Indications”
12 Quick Troubleshooting Reference “LED Indications”
14 LOFA 2-Year Limited Warranty
15 MSS-200 Wire Schematic
TABLE OF CONTENTS
Versatile and incredibly compact, the
MSS-200 automatic engine start stop
controller is used primarily on stationary
equipment, i.e. power generators,
compressors and pumping systems.
The highly flexible MSS-200 is fully
programmable. Its 15 parameters are
pre-programmed at the factory to the
most commonly used parameters.
Changing the factory preset, however,
is easily accomplished by pushing
three buttons on the front of the unit.
When used in combination with ground
contact switches, the MSS-200 can also
shutdown the engine due to a failure, i.e,
oil pressure, temperature, alternator
charge, v-belt or any other customer-
defined parameter.
Specifications
•12 & 24 volt operation
•Durable IP 63 spray-resistant housing
•Installs into 2-1/16” Panel Opening
•Overall length: 3-1/4”
•Automatic and manual start modes
•Customer programmable
•Ground controlled outputs with
maximum amperage capacity of
2A without relays
•Standby amperage draw
-Zero mA in (+) control mode
-40 mA in (–) control mode
•Operating temperature -22 °F - 185 °F
•Flasher/audible alarm output
•Low cost and ease of installation
•Programming instructions provided
with each unit
THE MSS-200

2
Options
The MSS-200 relay interface is an optional add on
component for the MSS-200 automatic start stop
module. This system was developed to reduce wiring,
simplify installation, and add more flexibility to the
auto start system. This unique circuit board plugs
directly onto the backside of the MSS-200 and
converts the 2A ground outputs of the MSS-200 to
30A battery positive current. This circuit board can be
equipped with up to four relays that can control starter
motor engagement, engine run solenoid, G/S switch,
Preheat, over-speed shut down. Originally designed
for the pumping industry, the relay interface is also
equipped with a float switch activation relay which
enables an engine to start and stop on demand by
means of two normally open floats.
Applications requiring warm-up and cool-down cycle
can utilize LOFA’s actuator speed control system. This
heavy duty actuator is available in 2, 4, and 6 inch
stroke, can be easily installed to the MSS-200’s G/S
switch output. This actuator ideal for turbo charged
engine and can slowly adjust the engines RPM
to the equipment’s specific requirement.
MSS-200 Relay Interface
Actuator

An auto start system on an internal
combustion engine can potentially cause
serious bodily harm. Make sure engine and
equipment have the appropriate protective
shields and that warning decals are placed
in an open and highly visible location.
When installing any automatic start system,
implement the following safety precautions.
(1) Disconnect the battery’s ground
wire prior to any installation or
service to prevent the engine from
automatically starting.
(2) Install warning decals in an open and
highly visible location. Each LOFA panel is
equipped with two safety decals one of
which is affixed directly to the panel. Should
extra decals be required, please contact
LOFA Industries, Inc. or send an e-mail to
[e-mail]. Free decals are available
and limited to 2 decals per panel.
(3) For additional safety Install LOFA’s
optional Safety Kit (part # 010-0020-00)
onto protective shields of engine and
equipment. This kit consists of qty. 2
normally open switches which will prevent
the engine from running if any protective
guard on the engine or equipment is
removed.
Addition safety switches may be required to
fully protect against safety hazards. Contact
LOFA Industries, Inc. for technical assistance
in selecting a safety kit that will meet your
specific application.
(4) For further safety install LOFA’s optional
pre-start Alarm Kit (part # 010-1002-00).
The Alarm Kit installs to the MSS-200’s
preheat output and can be programmed to
sound an alarm prior to engine start.
(5) Under no circumstance should the
MSS-200 automatic engine start system
be installed into a mobile vehicle that has
a manual transmission.
(6) A 1N4007 diode must be used when
using any of LOFA’s products to suppress a
potential high voltage spike. Install diode as
close as possible to the solenoid to prevent
high voltage spikes (up to 1000V or more
which can occur momentarily when a relay
or solenoid is switched off). Relay contacts,
electronics, etc., can be damaged, or
malfunctions can occur if these spikes reach
the electrical network without suppression.
Refer to diode installation sheet supplied
with each product for installation
instructions.
Every electronic product from LOFA is
supplied with qty. 2 diodes. Please note
installing the diode incorrectly or reversing
the battery’s polarity will damage the diodes.
(7) The LOFA Industries, Inc. warranty does
not cover consequential damages.
Applications that could cause consequential
damages if the engine failed to start or if
the engine were to shut down should
implement a backup system, i.e., backup
engine or generator, auto dialer,
satellite/cell phone monitoring system.
WARNING: READ CAREFULLY PRIOR TO INSTALLATION
3

BASIC PROGRAMMING INFORMATION
Each MSS-200 is factory programmed to the
most commonly used values, but can be easily
changed by the customer or by LOFA Industries.
The following information
is required for programming the MSS-200.
• Number of pole pairs, or if used with
a proximity switch, number of pulses
per revolution
• Belt ratio (pulley diameter. = D1÷ D2)
D1= Crank Shaft Pulley
D2 = Alternator Pulley
• Rated engine speed RPM (if required)
• Over-speed shutdown RPM (if required)
Hertz Calculation Formula
In oder to program hertz in parameters 18, 20,
22, 24 and 26, you will be required to enter
the above information specific to your engine
into the following hertz calculation formula.
Refer to this formula when programming hertz.
# Poles x RPM x Belt Ratio
--------------------------------------- = Hertz
60 Seconds
Programming Mode
Programming mode is accomplished by holding
down the OFF/SET button on the
MSS-200 for 2 seconds while energizing the
controller. On some LOFA panels equipped with
auto start, energizing the MSS-200 is
accomplished by turning the key switch to the
left position marked auto start. Releasing the
OFF/SET button will bring you to parameter #0
“PRE-HEAT DURATION” indicated by the
blinking #1 LED. Pushing the OFF/SET button
moves to each parameter in ascending order
and saves the programmed value. The MAN
button decreases while the AUTO button
increases the programmed value.
Basic Operations
The MSS-200 can be controlled directly from the
dial of the MSS-200 by simply pushing either
AUTO, MAN and OFF/SET. Only when the
MSS-200 is powered up and parameter 30 is
programmed to consume electricity will the
AUTO and MAN buttons control the engine.
Pressing the MAN button manually starts the
engine. Engine will continue to run until the
OFF/SET button is pressed again or until the
power is turned off. If parameter 10 is
programmed with a cool down cycle, pressing
the OFF/SET button once will start the cool-
down period. Pressing the OFF/SET button
again will override the cool-down cycle and the
engine will shut down immediately. Pressing the
AUTO button will cause the AUTO LED to light
up, indicating that the engine is in standby
mode. If AUTO LED is not lit the engine will not
start automatically. Note: A blinking AUTO LED
during power-up indicates that the auto start
input was activated and prevents the engine
from starting.
Preheat #0
The duration period of the preheat can be
programmed by time (in 4 sec. increments) or
by ambient temperature if used in combination
with a PT-1000 thermistor.
4

The preheat by time setting has priority
over ambient temperature. In case of a
defective thermistor or loose wire connection,
it is important that a time value is always
programmed when used in combination with
a thermistor. When using the temperature
thermistor provision, use the following table
for temperature verses time comparison.
The preheat function on the MSS-200 can
also be used in combination with a pre-start
audible alarm. Simply program a preheat
duration and add an alarm to the preheat
output to provide additional safety to your
equipment. Alarms are available as an option
from LOFA Industries, Inc.
Repeated Engine Starts #2
If the engine does not start on the first auto
start attempt, the engine will go into repeat
start mode. The MSS-200 can be
programmed to make a maximum of 15 new
engine start attempts. During repeated starts
the bottom left LED will blink, indicating that
the system is in repeated start mode. Note:
Engine will not go into repeated start mode if
the engine is started manually by pressing the
“MAN” button.
Pause Between Repeated
Engine Start #4
Pause between repeated engine start is the
period between each repeated start-up
attempt. The range for this pause is 5 - 75
seconds in 5 second increments.
Over-Crank #6
Over-crank the maximum time, in seconds,
that the starter motor can be engaged if the
engine fails to receive a frequency via the
alternator's frequency terminal or proximity
switch pick-up. The over-crank feature
eliminates the need for any manual settings of
starter motor duration usually required for low
temperature conditions.
G/S Generator Load Switch Delay #8
This parameter is primarily used on generator
sets and provides the ability to delay G/S
switch disengagement normally used to shut
off the main electricity-producing generator.
With this programmable feature, the
generator set will continue to produce AC
power from
0-75 seconds after full power is restored,
eliminating power interruptions should power
turn on and off.
Engine Cool-down Cycle #10
This parameter controls the length of time
in which the engine is in its cooling-down
cycle. Once the ground contact is removed
from the AUTO terminal wire, the MSS-200
will shut off the G/S Switch, i.e., generator
set, air compressor, or throttle control. The
engine will run without load for an amount
of time established by the customer. Cool-
5
Cº Fº Preheat After-Glow
+50122 0 sec 0 sec
+40104 4 sec 4 sec
+20 68 6 sec 4 sec
0 32 12 sec 6 sec
-20 -4 22 sec 6 sec
-40 -40 30 sec 6 sec

6
down cycle time can be programmed from
0 to 900 seconds in 60 second increments.
Note: Cool-down cycle can only be used when the
controller’s standby mode (parameter #30) is
programmed to consume electricity.
Oil Pressure Switch #12
This parameter is used to select the type
of oil pressure switch being used on the engine,
i.e., Normally Close, Normally Open or No Oil
Pressure Switch. The
“No Oil Pressure Switch” setting must be
selected when the MSS-200 is used in
combination with any other auxiliary engine
monitoring and shutdown system, i.e., EP-100,
MC-536 or MC-6K. In the solo mode the MSS-
200 can also be programmed to monitor oil
pressure. This feature adds starter motor
protection by preventing the starter motor from
engaging when the engine has oil pressure, or
if the pressure switch wire has been
disconnected. Applications requiring shutdown
for other critical functions like high temperature
or pump pressure can connect the switch wires
to the oil pressure input. Note: Making a small
jumper wire from the O/S terminal to Oel (oil)
terminal eliminates the need for adding an extra
relay for over-speed shutdown.
Oil Pressure Switch Delay #14
With this parameter a delay of 1 to 15 seconds
can be programmed for oil pressure switch
override. This feature gives the engine
a certain amount of time to build up oil pressure
during engine start prior to monitoring for
shutdown. This parameter is required only when
the MSS-200 is used in solo mode and when
the oil pressure parameter #12 is programmed
to either Normally Open or Normally Closed.
Auxiliary Engine Monitor #16
This parameter programs the MSS-200
controller to either a stand-alone application
(solo) or to an application utilizing an optional
engine shut device, i.e., EP-100, MC-536 or
MC-6K.
Duration of Start by Frequency #18
The MSS-200 will disengage the starter
motor when the engine has reached a certain
programmed frequency via the frequency
terminal of the alternator or proximity PNP
pickup. This feature not only disengages the
starter motor, but it’s also used as a safety
feature by preventing the engine from starting
when the controller senses RPM. Considering
that a starter motor typically disengages at 500
RPM, use the following calculation below using
an engine example with a 6 pole pair alternator
and a belt ratio of 2.0 :
6 x 500 x 2.0 6000
-------------------------- = --------- = 100 Hz
60 Seconds 60
G/S Frequency-based Load
Switch For Generator OR Over-speed
Shutdown For Pump #20 (Course)
Parameters #20, #22, #24 have two functions:
G/S frequency-based load switch for constant
speed generators applications or over-speed
shutdown for variable speed pump applications.
The generator switch (G/S) was originally
designed to activate an AC-producing
generator set, but this output can also used to
activate other accessories, i.e., air compressor
relief valve or throttle control.

EXAMPLE: 1800 RPM G/S Engagement
6 x 1800 x 2.0 21600
-------------------------- = ------------ = 360 Hz
60 Seconds 60
For parameter #20 select the next smaller
number calculated. In our example we
calculated 360 Hz. The next smaller number
on the programming table is 240 Hz. Press the
AUTO button until the LED pattern matches the
240 Hz value. Pressing the SET button saves
the programmed value and moves you to
parameter #22.
G/S Frequency-based Load
Switch For Generator OR Over-speed Shutdown
For Pump #22 (Medium)
In step #2 subtract the number entered
in step #1 from the total frequency calculated.
Example: 360 - 240 = 120 (Balance)
Divide the balance by the multiplier 16. Since
you can not use a fraction use the next smaller
number (7) and multiply by the multiplier (16)
which in this example is 112 hz. With this
example select the LED pattern that matches 112
Hz.
120
----- = 7.5 7 x 16 = 112 Hz
16
G/S Frequency-based Load Switch For
Generator OR Over-speed Shutdown For
Pump #24 (Fine)
Subtract 360 Hz from the total sums entered in
steps 1 and 2. The multiplier for step 3 equals 1
Hz. Parameter #24 would be programmed to 8
Hz.
240 Hz + 112 Hz = 352 Hz
360 Hz - 352 Hz = 8 Hz
Generator Over-speed Frequency OR Variable-
speed Pump Mode Selection #26
This parameter has two functions:
(1) Entering a value greater than zero programs
the MSS-200 controller to a constant speed
generator mode. The frequency programmed
in parameter 26 then becomes the over-speed
shutdown frequency. Should generator mode not
require over-speed then program #26 to highest
over-speed frequency setting available (150 Hz).
Use the following 2000 RPM calculation to
program over-speed for a constant speed
generator application:
EXAMPLE: Calculating Over-speed Hz
6 x 2000 x 2 24000
--------------------------- = ----------- = 400 Hz
60 Seconds 60
Subtract 360 (total Hz of G/S in step #20, 22
and 24) from 400 Hz (Over-speed Hz)
400 – 360 = 40 Hz. The multiplier for
parameter 26 equals 10. Press the AUTO or
MAN buttons until the LED pattern matches the
40 Hz value.
7

8
(2) Programming parameter #26 to zero
programs the MSS-200 for variable-speed pump
application with over-speed. The frequency
programmed in parameters 20, 22 and 26 then
becomes the RPM at which the engine will shut
down. Note: When programmed in pump mode
over-speed shutdown delay becomes a fixed zero
second delay.
Over-speed Shutdown Delay Generator Mode
OR Engine Warm-up Duration In Pump Mode
#28
This parameter also has two functions: (1) over-
speed shutdown delay when parameter 26 is
programmed to constant speed generator mode
or (2) engine warm-up duration on a variable-
speed pump mode.When the MSS-200 is
programmed to generator mode this parameter
can delay over-speed shutdown from 0 to 30
seconds. When the application is a variable-
speed pump with over-speed this parameter can
be used as a warm-up period from 8 to 38
seconds in 2 second increments.
Standby Mode #30
Standby mode on the MSS-200 can be
programmed to either to consume electricity or to
consume no electricity. In mode that consumes
electricity the controller is activated by a ground
contact to the AUTO terminal and deactivated
when ground from the AUTO terminal is
removed. During standby mode the top right
"AUTO" LED is lit indicating that the unit is in
standby mode. In the standby mode that does not
consume electricity the MSS-200 is activated
when the unit receives a battery plus signal.
When battery positive signal is removed
the engine will shut down immediately. Note:
Cool-down cycle and manual start
by pushing MAN can not be used in mode that
consumes no electricity.
Programming End
Programming mode can be ended at any time
simply by removing power from the MSS-200 or
by going to the last parameter #30. As long as
the OFF/SET button is pressed the last
programmed value will be saved in memory.
Pass Code
If the MSS-200 is programmed with a pass code
or if you are adding a pass code for the first
time, you will then be required to push the AUTO
and OFF/SET buttons at the same time while
energizing the system. As soon as the two buttons
are released the #1 LED blinks indicating #1 pass
code location. Note that this LED indication is the
same as preheat duration; however since the
AUTO and MAN buttons were pushed at the
same time this parameter equals pass-code #1. In
order to create a new pass code for the first time
the factory pass code setting of zero, zero, zero
must be entered. Refer to programming table for
more information.
Pass Code #32
This parameter changes the first of three pass
codes (0-15).
Pass Code #34
This parameter changes the second of
three pass codes (0-15).
Pass Code #36
This parameter changes the third of three pass
codes (0-15).

- Preheat time (0...60 seconds
or ambient temperature)
- Number of repeated starts
(0...15)
- Pause between repeated
starts (5...75 seconds)
- Over Crank (2...30 seconds)
or frequency
- G/S Generator load switch
shutdown delay (0...75
seconds)
- Engine cool-down cycle
(0...900 seconds)
- Oil pressure switch (normally
open, normally closed, or
without switch)
- Oil pressure delay override
(1...15 seconds)
- Auxiliary engine monitor and
shutdown system (EP-100,
MC-536, or solo)
- Starter motor disengagement
by frequency (in Hz)
- G/S frequency-based switch
to turn on electric power, air
compressor, throttle control,
etc. (in Hz)
- Over-speed shutdown (in Hz)
- Over-speed shutdown delay
(2...30 seconds)
- Warmup duration
(8...38 seconds)
- Standby mode (does/doesn’t
consume energy)
- Pass code (3 digit 0-15)
PROGRAMMING THE MSS-200
Indicates a flashing LED and identifies
the function being programmed
Indicates an on or lit LED and identifies
the value of the function
Indicates LED is off
Factor Value: 4
Factor Value: 2
Factor Value: 8
Factor Value: 1
4
2
8
LEDs
Value 12345678
1 1 1 1
4 4
1
8
2
1
2 2 2
4 848484848
2 1 2 1 2
8
4
2
LEDs
Value 9 101112 131415 16
1 1 1
84848 8 8
1
2 2 2
1
2
1 1
4 4
8
4
8
48 4
2 2 1 2
9
The MSS-200 is a state-of-the-art electronic automatic engine start-stop controller that can
be programmed to each customer’s unique requirements. The system programs from the
outside of the compact cylindrical design using a simple binary code sequence.
The controller has the following 15 programmable parameters:
The controller contains four (4) LEDs. Each LED, as shown below, has a dual purpose of
(1) parameter and (2) value.

PROGRAMMING GUIDE
Number Of
Pushes Of
OFF/SET
0
2
4
6
8
10
12
Button to
Push
OFF/SET+
Turn key
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
Parameter
Turn On
System
Preheat
Duration
Input:
Time (sec)
Repeated
Starts
Input:
Number of
Pause
Between
Starts
Input:
Time (sec)
Over
Crank
Input:
Time (sec)
G/S Load
Switch
Delay
Input:
Time (sec)
Engine
Cool-down
Cycle
Input:
Time (sec)
OilPressure
Switch
Input:
Type
LED
Indicator Multiplier
4
1
5
2
5
60
none
Normally
Closed (NC)
Normally
Open (NO)
Factory
Setting
0 sec
3
5 sec
10 sec
0 sec
0 sec
none
Range
0...60 sec
0...15
5...75 sec
2...30 sec
0...75 sec
0...900 sec
0-1-2
0-1-2
0-1-2
To
Decrease
Value (-)
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
To
Increase
Value (+)
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
4
2
8
1
4
2
8
1
4
1
8
2
4
1
8
2
4 8
2 1
4 8
2 1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
2
4
1
8
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
4
2
8
1
10

PROGRAMMING GUIDE
Number Of
Pushes Of
OFF/SET
14
16
18
20 Step #1
Course
RPM
Setting
Button to
Push
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
Parameter
OilPressure
Delay
Input:
Time (sec)
Aux. Engine
Monitoring
Solo
Opt. Engine
Monitoring Device
Duration Of Start
By Frequency
(Alt./ Pickup)
Input:
Frequency (Hz)
Pump Mode:
Over-speed Hz OR
Generator Mode:
G/SEngagement Hz
TurnsOnG/S
Without Any
Frequency
Input 1: Frequency
Continue Input In
Section 22, & 24
Input 2: Frequency
(Hz)
Input 3: Frequency
(Hz)
Input 4: Frequency
(Hz)
Input 5: Frequency
(Hz)
LED
Indicator
Multiplier
1
16
For Below
240 Hz
240 Hz And
Above
480 Hz And
Above
780 Hz And
Above
960 Hz And
Above
Range
0-1
0-1
1...240 Hz
0 Hz
240 Hz
480 Hz
720 Hz
960 Hz
To
Decrease
Value (-)
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
To
Increase
Value (+)
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
Note: For Over-speed shut down for variable speed pump applications parameter #26 must be programmed to zero
“pump mode.” In pump mode over-speed shutdown delay is a fixed zero second delay.
Factory
Setting
8 sec
Optional
Device
96 Hz
No
Frequency
Input
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
8
2
4
1
2
4
1
8
2
4
1
8
8
2
4
1
8
2
4
1
2
4
1
8
2
48
11
1

PROGRAMMING GUIDE
Number Of
Pushes Of
OFF/SET
22 Step #2
Medium
RPM
Setting
24 Step #3
Fine
RPM
Setting
26
28
30
Button
to Push
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
Parameter
Pump Mode:
Over-speed Hz OR
Generator Mode:
G/SEngagement Hz
Input:
Frequency(Hz)
Pump Mode:
Over-speed Hz OR
Generator Mode:
G/SEngagement Hz
Input:
Frequency(Hz)
Pump Mode OR
Generator Over-
speed Frequency
Pump Mode
Generator Mode:
Over-speed
Shutdown
Frequency (Hz)
Pump Mode
Warm-up
Period In Sec.
Generator Mode
Over-speed
Shutdown Delay
Input:
Time (sec)
Standby Mode
[Consumes NO
electricity]
Immediate Start
With + Current
[Consumes
electricity]
LED
Indicator Multiplier
16
1
1
10
2
Manual or
automatic start
when system
is grounded
Factory
Setting
0 Hz
0 Hz
0 Hz
Pump Mode
0 sec
Pump = 8 sec
Gen = 0 sec
Range
0...240 Hz
0-15 Hz
10...150 Hz
8...38 sec
0...30 sec
To
Decrease
Value (-)
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
(-) MAN
To
Increase
Value (+)
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
(+) AUTO
Note: When the MSS-200 is programmed in the standby mode which does not consume electricity, the AUTO input terminal on
the MSS-200 must be connected to a ground at all time.
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
Refer to
Parameter
#26
12

The MSS-200 allows the user to input a
3-digit pass code to prevent
unauthorized personnel from changing
any of the controller’s parameters. This
pass code is factory-set to 0,0,0.
However, the factory set pass code does
NOT prevent unauthorized individuals
from changing any of the controller’s
parameters. Entering a user-defined pass
code for the first time requires first
entering the factory-set pass code. In
order to enter a user-defined pass code,
one must first push and hold the
OFF/SET and AUTO buttons
simultaneously while energizing the
system. One LED will blink indicating the
first pass code. Press the OFF/SET button
and select the first pass code value (0-15)
using the AUTO and HAND buttons.
Repeat this procedure until all 3 pass
code numbers are entered. Once all
three numbers are entered, value number
1 LED will blink indicating PREHEAT.
From this point press the OFF/SET button
32 times and perform the procedure
shown to the right to change the pass
code. NOTE: There is no way for a
customer to override the pass code, so
write down your pass code and keep it in
a safe place.
ENTERING A PASS CODE
Number Of
Pushes Of
OFF/SET
0
1
3
0
Button to
Push
OFF/SET
and AUTO
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
Parameter
TurnonSystem
PassCode
Input:FirstValue
PassCode
Input:SecondValue
PassCode
Input:ThirdValue
Preheat:Continue
withProgramming
GuideNo.0
LED
Indicator Multiplier
1
1
1
Range
0...15
0...15
0...15
To
Decrease
Value (-)
(-) MANUAL
(-) MANUAL
(-) MANUAL
To
Increase
Value (+)
(+) AUTO
(+) AUTO
(+) AUTO
Factory
Setting
0
0
0
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
13

ENTERING A PASS CODE
Button To
Push
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
OFF/SET
Parameter
Passcode
Input:FirstValue
Passcode
Input::SecondValue
Passcode
Input:ThirdValue
LED
Indicator Multiplier
1
1
1
Range
0...15
0...15
0...15
To
Decrease
Value (-)
(-) MANUAL
(-) MANUAL
(-) MANUAL
To
Increase
Value (+)
(+) AUTO
(+) AUTO
(+) AUTO
Factory
Setting
0
0
0
Number Of
Pushes Of
OFF/SET
32
34
36
LEDs LED Explanation While MSS-200 Is In AUTO Mode
Automatic self-test. The MSS-200 is turned on (System Energized).
MSS-200 is awaiting start signal via ground (Switch contact is open). Changing to
manual start mode is possible by pressing the OFF/SET and then the HAND button.
Switch contact was closed while energizing the system. Pushing the AUTO or
OFF/SET then Hand button will start the engine.
Engine is preheating.
Engine is starting.
Engine is in repeated start mode.
Engine is running. The AUTO LED is lit indicating that the engine was started
automatically by grounding the AUTO terminal.
While engine was running the switch contact was closed or the OFF/SET
button was pushed one time. Engine is in the cooling-down cycle.
LED INDICATION
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
2
4 8
1
14

LEDs LED Explanation While MSS-200 Is In Manual Mode
Automatic self-test. The MSS-200 is turned on (System Energized).
The MSS-200 is in off position and is awaiting a manual start signal (Pushing
HAND button will start engine). Changing to AUTO mode is possible by
pressing the AUTO button.
Engine is preheating.
Engine is starting.
Engine is running via the manual mode. If programmed engine will go into
c cool-down cycle when the OFF/SET button is pushed 1 time. Engine will stop
immediately when OFF/SET button is pushed 2 times.
Engine is in cooling-down cycle. Engine will shut down after it runs without a
load for the programmed amount of time.
LED INDICATION
LEDs Explanation of Failure
No oil pressure or over-speed if a jumper wire was made from O/S to Oel.
Defective alternator or pick-up, wire breakage or v-belt breakage. MSS-200
is not receiving a frequency signal.
Engine did not reach the set engine speed within 30 seconds (Relates to G/S
frequency in parameters 20, 22, 24, and 26 programmed to generator mode).
Possible problem with inputs: electrical short, wire breakage, or
defective transistor.
Prior to engine start there was a problem with the alternator or oil pressure switch,
which is most probably due to an incorrect value programmed into the system.
All engine start attempts failed. Check fuel level or fuel filter.
TROUBLESHOOTING
2
4 8
1
1
2
4
2
4
8
2
4 8
8
1
2
4
2
4
2
4
8
1
1
8
8
8
1
48
1
1
1
2
4 8
1
2
4 8
1
15
2
48
2
4
2
1

NOTES

NOTES

NOTES

©2002 LOFA Industries, Inc. LOFA Industries, Inc. is constantly striving to improve its products and must, therefore, reserve the
right to change designs, materials, specifications and prices without notice. Printed in the USA. 03/02
250 Hembree Park Drive, Suite 122, Roswell, Georgia 30076
PHONE [phone] FAX [phone] www.LOFA.net