Simrad MX510 User manual

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Manual
Simrad MX510 and MX512
Navigation Systems
English

Operator & Installation manual
Simrad MX510 and MX512
Navigation Systems
English
The original language for this document is English. In the event of any discrepancy
between translated versions and the English version of this document, the English
document will be the official version.
Document no: 510 100 2002
Revision: B
Date: May 2010
To the best of our knowledge, the content in this publication was correct at the time of
printing.
As we are continuously improving our products we retain the right to make changes to
the product and the documentation at any time. Updated manuals are available from our
website www.simrad-yachting.com, and are free to download.
© Copyright 2010 by Navico Holding AS.

2 | MX510/MX512 Operator & Installation Manual
IMPORTANT NOTICE!!
THE MX51xIS AN AID TO NAVIGATION ONLY. UNDER NO CIRCUMSTANCES
SHOULD IT BE USED IN LIEU OF AUTHORIZED GOVERNMENT CHARTS. ITS
ACCURACY CAN BE AFFECTED BY MANY FACTORS SUCH AS EQUIPMENT
DEFECTS, ENVIRONMENTAL CONDITIONS, OR IMPROPER OPERATION. THE
USER IS RESPONSIBLE FOR SAFE NAVIGATION OF THE VESSEL. THIS INCLUDES
CONSULTING AUTHORIZED GOVERNMENT CHARTS AND EXERCISING COMMON
PRUDENCE AND NAVIGATIONAL JUDGEMENT AT ALL TIMES.
How To Contact Us?
Contact your local SIMRAD Marine dealer for:
Installation, Service, & Technical Support
•
Sales of Accessories
•
Hardware and Software Upgrades
•
Unlike many other consumer electronics industries which only sell consumer electronic
devices, your marine dealer is often your best advisor for installation and service of your
new GPS receiver. We strongly encourage you to utilize the knowledge and experience
of your sales and service dealer.
Should you need to contact us directly for new sales, upgrades, repair service, or
technical support, we can be reached at the following:
USA Office:
NAVICO TORRANCE
A Division of NAVICO, Inc.
23868 Hawthorne Blvd., Suite 201
Torrance, California 90505-5908
USA
[phone] Telephone
[phone] Fax
Internet:
www.simrad-yachting.com/en/Products/Professional/MX-Line/
Product Information
The model and serial number of your instrument are given on the instrument. Enter the
model and serial number in the spaces provided below. Always refer to this information
when you contact your dealer.
MX51_ CDU Serial No.:_________________
Antenna Model: __________________
Antenna S/N: __________________
Europe:
NAVICO UK Ltd.
Contact your dealer.
www.simrad-yachting.com/
Store-locator

MX510/MX512 Operator & Installation Manual | 3
About this manual
Models Covered are:
MX51x GPS/DGPS
MX51x/BR
MX51x/BRIM
MX51x/MUC
This manual covers the operation and installation of both the MX510 and MX512 CDU
models. The keypad operation of these models are identical.
We have attempted to take care and develop manuals which provide in-depth
information. Where possible, we have attempted not only to describe what you see on
the screen, but how to understand and use it as well. Obviously, we can’t teach you how
to navigate, but we can help make your work more thorough and enjoyable. Throughout
the manual, you will find helpful hints about the interaction of various functions. In a
piece of equipment that has the many capabilities, important details can sometimes
become obscured in one or two lines of text. In our effort to ensure you get the most out
of this documentation, and to protect against important details becoming lost, don’t be
surprised if you see the same or similar information more than once.
This manual is organized into two main parts. The first section deals with the operation
while the second section talks about the installation and electrical interface. We start
by describing first the MX51x models covered in this book, then the special front panel
features including the traffic light indicator and USB connector. The sections that follow
detail each primary function as it is presented on the front panel (i.e. NAV, RTE, WPT,
PLOT, ...CFG). The appendices describe important details about special functions and
installation of the MX51x.
We hope you find the manual enjoyable and informative reading. As always, we welcome
your comments on improving our products or manuals. We wouldn’t mind if you wrote
to tell us that we did the job right the first time either. You can find a Reader Comment
Card at the back of the manual.
Related Documents
MX51x Quick Reference Guide (P/N 510 100 2003)
Symbols used in this manual
Important text that requires special attention from the reader is emphasized as follows:
Used to draw the reader’s attention to a comment or some important information.
When necessary, used to warn personnel they should proceed carefully to
prevent risk of injury and/or damage to equipment.

4 | MX510/MX512 Operator & Installation Manual
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Contents | 5
Contents
1 About GPS Navigation ...................................................... 11
Special notes.......................................................................11
2 Functional Description ..................................................... 13
CDU Congurations ..............................................................13
Basic CDU conguration ................................................13
MX51x DGPS................................................................13
MX51x/BR ..................................................................13
MX51x/BRIM (Backup Receiver Integrity Monitor) .............14
MX51x/MUC (Multi Unit Control) .....................................14
3 DGPS Beacon System ....................................................... 15
4 Keypad & Display Description .......................................... 17
Differential GPS Trafc Light Operation: ..................................17
GPS Trafc Light Operation: ..................................................18
The Display: ........................................................................19
+ Virtual Softkeys: .......................................................19
The Function Keys: ...............................................................20
Programmable Keys (F1 to F4) .....................................20
Mark / MOB Key .........................................................20
GOTO.......................................................................21
POWER ON/OFF ........................................................21
CLR (CLEAR) .............................................................21
CURSOR ..................................................................21
ENTER.....................................................................21
DAY/NIGHT View.......................................................21
FUNCTION Keys ...................................................................22
Automatic Identication System (AIS) ..........................22
Navigate....................................................................22
Dead Reckoning ...........................................................23
NAV1 - The Panorama Screen ........................................23
NAV2 - Basic Steering Information..................................25

6 | Contents
NAV3 - Expanded Navigation Information ........................25
NAV4 - Sensor Input Navigation .....................................26
NAV5 - Compass Display Screen.....................................28
NAV6 - Compass Display Screen.....................................28
Route........................................................................28
RTE1 - The Active Route................................................29
Creating a Route Using the GOTO Key:............................29
Erasing an Existing Route ..............................................31
Creating a Multi-Waypoint Active Route ...........................32
Insert By Number.........................................................32
Choose in Bank ............................................................33
Insert New Waypoint ....................................................34
Insert Route ................................................................34
Maneuvering Within the Route........................................35
ETA Setup ...................................................................37
SOG Based on Arrival Date & Time: ................................37
RTE2 - The Route Bank .................................................38
Waypoint ...................................................................39
Creating and Editing Waypoints ......................................39
Waypoint Lock/Unlock...................................................42
Removing Waypoints.....................................................43
Moving waypoints .........................................................44
Saving or Restoring Memory Data Using a USB Device ......46
Downloading Waypoints & Routes to Other Devices ...........47
Downloading Waypoints to a Personal Computer...............49
Uploading Waypoints from Other Devices ........................50
Uploading Waypoints from a Personal Computer ...............51
Mark / MOB ...............................................................52
GOTO........................................................................52
Plot...........................................................................54
PLOT 1 - Relative to Boat...............................................55
Customizing the Display ................................................55
Plot Screen Use Examples .............................................57
Grid Search .................................................................57
Man Over Board .........................................................58
Remote MOB................................................................59
Auxiliary....................................................................59

Contents | 7
AUX1 - Alarm Log .......................................................59
AUX2 - Speed Graph.....................................................59
AUX3 - Not Used ..........................................................60
AUX4 - Sun Almanac.....................................................60
AUX5 - Moon Phases.....................................................60
AUX6 - Batteries ..........................................................60
AUX7 -Unit Information .................................................60
AUX 10 - Tide ..............................................................61
Current Tide Display .....................................................61
AUX 11 - Tide Table Port List..........................................62
Adding a Port...............................................................63
Position .....................................................................64
POS1 - Position Display (Large Lat/Long Digits) ................64
User GRID...................................................................65
POS2 - Position, Altitude, Magnetic Variation, & Time ........65
POS3 - Position & Log ...................................................65
GPS ..........................................................................66
GPS1 - GPS Status Screen.............................................66
GPS2 - GPS Health Screen.............................................66
GPS3 - Visible Satellites ................................................67
GPS4 - GPS Position Uncertainty ....................................67
GPS5 - RAIM Status Screen ..........................................67
GPS6 - DGPS STATUS ..................................................69
GPS7 - DGPS Messages.................................................70
Conguration ..............................................................71
Alarms................................................................................71
Anchor - Anchor Watch Alarm ................................................71
COG SOG - Course & Speed Filter Settings & Setup ..................71
Compass - External Compass Input & Magnetic Variation Table ..72
Datum - Current Position Calculation ......................................73
Depth - NMEA Input Control ..................................................73
DGPS - DGPS Conguration ...................................................74
DGPS Mode: ................................................................74
DR - Dead Reckoning............................................................75
Dual Control - Dual Station Control.........................................75
GPS - Elevation Mask Control.................................................76
Initial Pos - Initial Position Entry.............................................77
LAN - Local Area Network .....................................................77
LAN Output (NMEA 0183 OVER IP)..........................................78
Language - Language Conguration........................................78

8 | Contents
Lighting - Display/Keyboard Light, Contrast Control & Set Display Default
Setting ...............................................................................78
Log - Speed Log Input (Pulse or NMEA 0183) ...........................79
Log Pulses - GPS SOG Log Pulse Output ..................................79
LORAN-C Integration ............................................................80
Raytheon: ...................................................................80
Locus: ........................................................................81
Memory ..............................................................................83
Navigation - Navigation Method & Waypoint Pass Criterion Control8 3
NMEA Out 1 - NMEA 0183 Output Data Control ........................85
Other Special Cases Affecting NMEA 0183 Records: ..................87
Operation - General Setup and Control Settings .......................88
Organizer - Automated Message Reminders .............................88
Position - Positioning Reference, Mode, & Alarm Control ............89
Printout (n) - Printer Output Control........................................90
ROT (Rate of Turn) ...............................................................91
Security..............................................................................92
Serial I/O ............................................................................92
Time - Mode and Format Control ............................................92
USB - USB Mass Storage Conguration ...................................93
VGA ..................................................................................94
Wind ..................................................................................94
Wpt & Rte Input - Uploading Waypoints into the MX51x .............95
5 Installation ...................................................................... 97
List of Components ..............................................................97
Installation notes .................................................................99
General.......................................................................99
Electronic Connections ..................................................99
Wire Preparation Procedure ......................................... 100
External Power........................................................... 100
Antenna Installation.................................................... 101
MX51x Navigator Installation........................................ 102
Equipment Interfacing................................................. 103
Mechanical installation drawings........................................... 115
MX510 Electrical installation drawings ................................... 123
MX512 Electrical installation drawings ................................... 131
6 Technical specications ................................................. 141
Appendix A - Datum List.................................................... 145
Appendix B - Engineering Mode......................................... 147
AUX7 - Unit Information & Self Test ...................................... 147

Contents | 9
CDU Cold Start - Clearing Memory to Factory Default ............. 148
GPS - GPS CDU Troubleshooting........................................... 149
GPS3 - Visible Satellite Information .............................. 149
GPS4 - GPS Position Uncertainty .................................. 149
Antenna Reset Tools ................................................... 150
Appendix C - Multiple Unit Control (Via LAN) .................. 151
Dual Control Conguration: ................................................. 151
Turning Master or Slave Units Off ......................................... 152
Backup Receiver Integrity Monitoring (BRIM) ......................... 152
Multiple Unit Control Conguration................................ 152
Appendix D - Demonstration Mode.................................... 155
Appendix E - AIS connection for MX512 only .................... 157
Introduction .............................................................. 157
Ship-to-Ship Data Exchange ........................................ 157
Coastal Surveillance ................................................... 158
Vessel Trafc Systems ................................................ 158
AIS Communications Scheme....................................... 159
AIS Message.............................................................. 160
MX512/AIS the Total Shipboard GPS/DGPS/AIS Solution .. 162
AIS System Setup .............................................................. 162
AIS Cong Setup........................................................ 162
AIS Static ......................................................................... 163
Conguring the AIS Voyage ................................................. 166
AIS Function Key................................................................ 168
AIS 1 – OWN SHIP DATA ..................................................... 168
AIS 2 - Remote Ship List ..................................................... 170
AIS 3 - RECEIVED (RX) SAFETY MESSAGES........................... 171
AIS 4 - TRANSMIT (TX) SAFETY MESSAGE ............................ 171
AIS 5 - TX Safety List ........................................................ 172
AIS 6 - REGIONAL AREAS ................................................... 173
AIS 7- LONG RANGE (LR) DISPLAY ....................................... 174
AIS 9 – AIS STATUS ........................................................... 176
AIS11 – Security Log .......................................................... 176
AIS12 - Remote Ship EPFS .................................................. 176
AIS13 - Remote Ship Data................................................... 177
PLOT 3 – AIS Plot Screen .................................................... 177
Automatic Identication System Installation Section ....... 178
Compass Diagram ...................................................... 179
Appendix F - Glossary ....................................................... 185

10 | Contents
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About GPS Navigation | 11
1 About GPS Navigation
This GPS receiver is a precision navigation instrument utilizing the latest technology
available today to provide optimum performance from the GPS satellite and Beacon
land signals received. As with all other forms of radio signals, the ultimate navigation
result is dependent upon the quality of these signals. Radio signals may, on occasion,
be distorted, jammed, or otherwise incorrect. As a result, your position accuracy may
occasionally be less than that which can normally be expected.
The Navstar Global Positioning System, commonly referred to as GPS, is a satellite
navigation system developed by the U.S. Department of Defense to provide both military
and civilian users with highly accurate, worldwide, three dimensional navigation and
time. By receiving signals from orbiting GPS satellites, authorized users are able to
continuously navigate with an accuracy on the order of 5 meters 2D RMS or better
A technique referred to as Differential GPS (DGPS), allows users to obtain maximum
accuracy from the GPS system. DGPS requires the use of two GPS receivers. One
receiver, known as the Reference Station, is placed at a surveyed location, the
coordinates of which are precisely known. The purpose of the differential GPS system
is to use the reference station to measure the errors in the GPS signals and to compute
corrections to remove the errors. The corrections are then communicated in real-time
to the navigators, where they are combined with the satellite signals received by the
navigators, thereby improving their navigation or positioning. The geographic validity of
these corrections decreases with distance from the reference station, but the corrections
are valid for navigators hundreds of kilometers from the reference station.
Marine radio beacons operating in the 283.5 to 325.0 KHz frequency range are in
widespread use for direction finding in coastal navigation. Because the beacon system
has been in place and widely used for many years, it provides an effective means for
the transmission of DGPS signals. Depending on their local environment and power
output, their signals may be usable to several hundred miles. Marine beacons provide an
economical means of obtaining DGPS accuracy for coastal navigators. GPS receivers with
built-in beacon receivers are designed to provide low cost reception of DGPS corrections
broadcast (normally free of charge) by coastal authorities.
Special notes
GPS
Never rely solely on any single navigational aid. Always use whatever information is
available, and cross-check information when possible. GPS expected position accuracy is
better than 30 meters (95% of the time) but may be up to 100 meters occasionally. The
derived speed and course readings may be hampered accordingly. The GPS system was
declared operational in 1994; however, the system’s availability and accuracy are subject
to change at the discretion of the US Department of Defense.
DGPS
This GPS receiver’s position accuracy is improved to 1 meter or better for 95% of the time,
subject to the availability, accuracy, and control of the DGPS correction transmission from
the Beacon Station.
The beacon radio signal which carries the DGPS corrections may be hampered by weather
conditions such as heavy rain, snow, and thunder storms. The beacon radio signal may
also be interrupted by powerful radio transmitters operating in long wavelength bands.
Charts and Navigational Aids
Positions obtained from charts are not always as accurate as your navigator (due to
environmental changes, the dates of charts, and datum offsets if the datum differs from
the one in use by the navigator). The position of a floating aid can differ due to tide, set
and drift
Compass Safe Distance
1 meter.

12 | About GPS Navigation
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Functional description | 13
2 Functional Description
The MX510 and MX512 Navigation CDU models are generally described in this manual as
MX51x Control and Display Unit (CDU). Their general operating features are identical and
will be described in common details in this manual. Specific model number will be called
in areas where they differ from one another.
CDU Congurations
The MX510 and MX512 Navigation System is available in several configurations. Please
refer to the Auxiliary Unit Information section of the manual to view sample screens to
identify your particular model. Described below are the various configurations and their
differences.
Basic CDU conguration
The MX510 has two (2) bidirectional user NMEA ports while the MX512 has nine (9)
bidirectional user NMEA ports. Both models have one (1) high-speed Local Area Network
(LAN) port and two USB ports. The basic GPS navigation model includes the CDU and a
smart GPS antenna
Basic MX510/512 GPS Configuration
MX51x DGPS
The MX51x DGPS model is supplied with a smart DGPS antenna with built-in Beacon
receiver (MX521A B-10 DGPS). The smart DGPS antenna unit can achieve better than 1
meter accuracy in areas with good beacon differential coverage.
Basic MX51x DGPS Configuration
MX51x/BR
The MX51x/BR configuration is a dual-control system where two MX51x (one operating
as a master and the other as a slave) is supplied. Only one MX521A smart DGPS
antenna is required. The antenna unit is connected only to the master unit. The two
MX51x CDUs communicate via the high-speed LAN port.
LAN port must be setup before enabling this feature. The units can be connected
together using an ethernet crossover cable (when connected directly) or through a hub/
switch/router. See section 4 of this manual for setup details.

14 | Functional description
MX51x BR Beacon and Remote Configuration
MX51x/BRIM (Backup Receiver Integrity Monitor)
The MX51x/BRIM is an enhanced Dual-Control configuration wherein two MX51x CDUs
and two MX521A smart DGPS antennas are supplied. The two MX51x units are connected
in dual-control configuration but they operate as independent navigator units with
dedicated antennas. The Integrity Monitoring (IM) feature is a software option that
works in the MX51x CDU hardware.
This configuration allows data to be shared between two remotely separated stations
(i.e. navigator’s station and helmsman’s station), with independent access to various
information fields. The purpose of this configuration is to enable each CDU to calculate
its own position, then check the operational status of the other GPS receiver. The GPS
receiver with the best overall operational status provides the system position. This is a
fully redundant system, with self-recovery capabilities. The Integrity Monitor function
can be set to Automatic switch over or forced to the any of the units for position and
navigation functions.
LAN port must be setup before enabling the IM feature. The units can be connected over
an ethernet crossover cable or through a hub/switch/router. See section 4 of this manual
for setup details.
MX51x/BRIM System Configuration
MX51x/MUC (Multi Unit Control)
The MX51x/MUC is a configuration wherein three or more MX51x units are networked
together using a hub or a router switch. In a MUC network one unit is assigned as a
master unit and the rest are either slaves or repeaters. Slave units are able to display
navigation data and control the master unit remotely while the repeaters can only
display navigation data. A maximum of five MX51x units can be a member of the MUC
network, one master unit, one or two slaves and the rest as repeaters. Please refer to
the installation notes section of this manual for the MUC diagram.
1) In general, this manual will refer to all versions of this product line simply as the
MX51x CDU, CDU or navigator. Where distinction between models is necessary, the
particular model type will be indicated.
2) Four MX Smart antenna models are compatible with the MX51x CDU. They are the
MX421-10 (GPS or DGPS), MX525A (DGPS only), MX521A (GPS or DGPS ) and MX575A
DGPS Compass.

DGPS Beacon System | 15
3 DGPS Beacon System
As Maritime Safety Administrations, Navy, and Coast Guard Organizations realize the
limitations of standard GPS positioning, many have begun installing DGPS Beacon
Stations. While an understanding of this system is not necessary for operating receivers
with internal beacon receivers, you may want to read on to have a better understanding
of how your receiver is capable of achieving the high levels of accuracy made possible by
this network of transmitters.
The DGPS Beacon System is comprised of three segments: the reference station,
Integrity Monitor (IM) equipment located at the beacon site, and the Navigator
equipment located on board the user’s boat or vehicle. The DGPS beacon system design
is illustrated below.
Because of the limited range of the beacon transmitters, typically 150 to 400 km, the
corrections generated by the reference station are always valid for users who can
receive the correction signals and maintain a 5 meter or better accuracy figure.

16 | DGPS Beacon System
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Keypad & Display Description | 17
4 Keypad & Display Description
The MX510 and MX512 keypad operation and traffic light indications are identical. The Traffic
Lights on the right side of the display will tell you how your navigator is operating.
You need to take care in reading the trafc light indications, as there are overlapping
possibilities between the GPS and DGPS modes. If you are unsure of the current
operating mode, select the CFG function key and scroll down to the DGPS selection. If
the DGPS mode is selected to anything other than Off, then follow the Differential GPS
Trafc Light Operation. If the DGPS mode is selected to Off, then follow the GPS Trafc
Light Operation.
Differential GPS Trafc Light Operation:
Red Flashing
Not tracking satellites (no position update). This is normal for the first 2 minutes or
so when turning the unit on. The very first time you turn the unit on, or if the memory
is reset or lost, this condition is also normal. Allow the receiver to run for at least 20
minutes under these circumstances. If it still does not change to Red Solid, refer to the
troubleshooting section in the page 110 of this manual. An icon similar to the one at left
will be displayed in the upper left corner of screen.
Red/Yellow Solid
Dead Reckoning . When normal GPS or DGPS operation is not available, this LED sequence
is provided to quickly identify the DR navigation mode. A DR indicator is also displayed on
all screens.
Red Solid
Tracking one or more satellites (no position update). This is also normal for the first 2
minutes or so when turning the unit on. The very first time you turn the unit on, allow
the receiver to run for at least 20 minutes after changing to Red Solid to collect an
almanac from the satellites, regardless of whether a position fix has been calculated
or not. This is also a normal indication if the HDOP is greater than 10, if the receiver
is tracking too few satellites, or for other reasons as well. Read the GPS and DGPS
function screens for more information.

18 | Keypad & Display Description
Yellow/Green Solid
GPS position update; DGPS corrections are not being received. You may see this
from time to time during normal operation. It usually occurs when the beacon signal is
not available (either it is being blocked by terrain or a local object or you are out of range
of the transmitter) and/or you are tracking 3, 4, or 5 satellites, and the satellites have
poor geometry relative to your position. The condition will normally go back to green
solid, when it picks up another beacon station. The factory default level for dropping
DGPS corrections is 600 seconds. During this period, your positioning information maybe
less than optimal, and position accuracy may be off by as much as 5 meters. Press the
GPS function key and refer to the DGPS section in this manual for guidance if this light
condition occurs.
Yellow Solid
DGPS position update with poor HDOP value. You may see this from time to time
during normal operation. It usually occurs when you are tracking 3, 4, or 5 satellites, and
the satellites have poor geometry relative to your position. The condition will normally
go back to Green Solid when it picks up another satellite or the geometry of the existing
satellites improves. The factory default level for this indication is with an HDOP of 4 to 10.
During this period, your positioning information is less than optimal, and position accuracy
may be off by as much as 5 to 10 meters. You can press the GPS function key and refer to
the GPS section in this manual for guidance if this light condition occurs.
Green Solid
DGPS position update with HDOP value less than 4. This is the normal operating
condition. Position accuracy is normally better than 3 meters. Keep in mind that position
accuracy is only as good as the corrections received, their age, your distance from the
reference station, and the geometry of the satellites. This is the normal operating condition
and no icon will be displayed.
GPS Trafc Light Operation:
Red Flashing
Not tracking satellites (no position update). This is normal for the first 2 minutes or so
when turning the unit on. The very first time you turn the unit on, or if the memory is reset
or lost, this condition is also normal. Allow the receiver to run for at least 30 minutes under
these circumstances. If it still does not change to Red Solid, refer to the troubleshooting
section in the page 110 of this manual. An icon similar to the one at left will be displayed
in the upper left corner of the screen.
Red/Yellow Solid
Dead Reckoning . When normal GPS or DGPS operation is not available, this LED sequence
is provided to quickly identify the DR navigation mode. A DR indicator is also displayed on
all screens in the upper left hand corner of the display.
Red Solid
Tracking one or more satellites (no position update). This is also normal for the
first 2 minutes or so when turning the unit on. The very first time you turn the unit on,
allow the receiver to run for at least 20 minutes after changing to Red Solid to collect an
almanac from the satellites, regardless of whether a position update has been calculated
or not. This is also a normal indication if the HDOP is greater than 10. The HDOP value
can be read in the GPS function screens.
Yellow Solid
GPS position update has a poor HDOP value. You may see this from time to time
during normal operation. It usually occurs when you are tracking 3, 4, or 5 satellites,
and the satellites have poor geometry relative to your position. If you are patient, the
condition will normally go back to Green Solid when you pick up another satellite or the
geometry of the existing satellites improves. The factory default level for this indication
is with an HDOP of 4 to 10. During this period, your positioning information is less than
optimal, and position accuracy may be off by as much as 10 to 30 meters. You can press
the GPS function key and refer to the GPS section in this manual for guidance if this light
condition occurs.