Kohler M340+ Service And Parts Manual

Page 1
Service and Parts
Automatic Transfer Switches
Models:
M340+
Logic:
Microprocessor
U.S.A. Plant ISO Registered
TP-5672 11/95d
Page 2
SUBJECT PAGE SUBJECT PAGE
Safety Precautions and Instructions I. . . . . . . . . . .
Introduction i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of Related Manuals i. . . . . . . . . . . . . . . . . . . . . . . .
Service Assistance i. . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1. Specifications 1-1. . . . . . . . . . . . . . . . . . .
Purpose of Switch 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Components of Switch 1-1. . . . . . . . . . . . . . . . . . . . . . .
Ratings 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interpreting a Transfer Switch Part Number 1-3. . . . .
Specifications 1-4.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Features 1-4. . . . . . . . . . . . . . . . . . . . . . .
Shunt-Jumper-Controlled Accessories 1-5. . . . . .
Optional Features 1-5. . . . . . . . . . . . . . . . . . . . . . . .
Section 2. Operation 2-1. . . . . . . . . . . . . . . . . . . . . . .
LED Indicators 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Switches and Indicators 2-2. . . . . . . . . . . . . . .
Sequence of Operation 2-3. . . . . . . . . . . . . . . . . . . . . . .
Normal Source Failure 2-3. . . . . . . . . . . . . . . . . . . .
Normal Source Restoration 2-4. . . . . . . . . . . . . . .
Sequence of Operation Programmed Transition 2-6.
Normal Source Failure 2-6. . . . . . . . . . . . . . . . . . . .
Normal Source Restoration 2-7. . . . . . . . . . . . . . .
To Disconnect The P1 Plug 2-9. . . . . . . . . . . . . . . . . . .
Electrical Operation Test 2-9. . . . . . . . . . . . . . . . . . . . .
Section 3. Troubleshooting Guide 3-1. . . . . . . . . .
Section 4. Controller Troubleshooting 4-1. . . . . .
Power to the System 4-2. . . . . . . . . . . . . . . . . . . . . . . . .
Keypad And Status Panel 4-3. . . . . . . . . . . . . . . . . . . .
Normal Source Voltage and Frequency 4-6.. . . . . . . .
Emergency Source Voltage and Frequency 4-9.. . . .
System-Status, Not-In-Automatic Error 4-11.. . . . . . .
System-Status, System-Alert 4-12. . . . . . . . . . . . . . . .
Contactor Position Fault Error Messages 4-12. . . . . .
Transfer Hang Error Message 4-12. . . . . . . . . . . . . . . .
Power-Down Error Message 4-12. . . . . . . . . . . . . . . . .
RAM Or Memory Error Message 4-13. . . . . . . . . . . . .
Manual Transfer Message 4-13. . . . . . . . . . . . . . . . . . .
Manual-to-Off Transfer Message 4-13.. . . . . . . . . . . .
Fault #1 Or Fault #2 Message 4-14.. . . . . . . . . . . . . . .
Programming Mode Not-In-Off 4-15. . . . . . . . . . . . . . .
Engine Operates When it Should Not 4-16. . . . . . . . .
Engine Will Not Start 4-18.. . . . . . . . . . . . . . . . . . . . . . .
Area Protection 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shunt Jumper-Controlled Options 4-21. . . . . . . . . . . . .
Inphase Monitor 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Source Monitors 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plant Exerciser 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Delays 4-32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Override 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . .
Off Delays 4-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 5. Accessory Troubleshooting 5-1. . . . . .
Optional Accessories 5-2. . . . . . . . . . . . . . . . . . . . . . . .
Emergency Source Three-Phase Phase Option 5-2.
Test Switches 5-4.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Delay Override Option 5-10. . . . . . . . . . . . . . . . .
Preferred Source Switch 5-14.. . . . . . . . . . . . . . . . . . .
Relay Auxiliary Dry Contacts 5-15. . . . . . . . . . . . . . . . .
Main Shaft Auxiliary Dry Contacts 5-22. . . . . . . . . . . .
Meters 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Charger 5-47. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Operation Switches 5-54. . . . . . . . . . . . . . . . . .
Load Shedding Contacts 5-63. . . . . . . . . . . . . . . . . . . .
Remote Communication—RS/232 Or RS/485 5-65. .
Section 6. Service Parts 6-1. . . . . . . . . . . . . . . . . . . .
Introduction 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inner Panel 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Delay 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Source monitors 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Switches 6-5.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Time Delay Override Switches 6-5.. . . . . . . . . . . . . . .
Preferred-Source Switches 6-5. . . . . . . . . . . . . . . . . . .
Auxiliary Contacts—Relay 6-5. . . . . . . . . . . . . . . . . . . .
Auxiliary Contacts—Main Shaft 6-5. . . . . . . . . . . . . . . .
Meters 6-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plant Exercisers 6-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Chargers 6-11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Source Monitors—Normal and Emergency 6-12. . . .
Load-Shed Contacts 6-12.. . . . . . . . . . . . . . . . . . . . . . .
Time Delays 6-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A. Glossary of Abbreviations A-1.. . . .
Appendix B. General Controller Information B-1. Appendix C. Commonly Used Accessories C-1. .
Page 3
Safety Precautions and Instructions
A transfer switch, like any other electromechanical device, can pose potential dangers to life and limb if improperly maintained or imprudently operated. The best way to prevent accidents is to be aware of the potential dangers and to always use good common sense. Below are some general precautions relating to theoperation ofa transfer switch. This manual contains several types of safety precautions which are explained below. SAVE THESE INSTRUCTIONS.
DANGER
Danger indicates the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the danger is ignored.
WARNING
Warning indicates the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the warning is ignored.
NOTE
Note communicates installation, operation, or maintenance information that is important but not hazard related.
Safety decals are affixed to the generator set in prominent places to advise the operator or service technician of potential hazards. The decals are reproduced here to improve operator recognition. For a further explanation of decal information, refer to the safety precautions throughout this manual. Before operating or servicing the generator set, be sure you understand the messages of these decals. Replace decals if missing or damaged.
Safety decals are affixed to the transfer switch in prominent places to advise the operator or service technician of potential hazards. The decals are reproduced here to improve operator recognition. For a further explanation of decal information, refer to the safety precautions throughout this manual. Before operating or servicing the transfer switch, be sure you understand the messages of these decals. Replace decals if missing or damaged.
CAUTION
Caution indicates the presence of a hazard that will or can cause minor personal injury or property damage if
the caution is ignored.
TP-5672 11/95
Safety Precautions and Instructions I
Page 4
Accidental Starting
WARNING
Accidental starting. Can cause severe injury or death.
Disconnect battery cables before working on generator set (negative lead first and reconnect it last).
Accidental starting can cause severe injury or death. Turn generator set master switch to OFF
position, disconnect power to battery charger, and remove battery cables (remove negative lead first and reconnectitlast)to disable generator setbeforeworking on any equipment connected to generator set. The generator set can be started by automatic transfer switch or remote start/stop switch unless these precautions are followed.
II Safety Precautions and Instructions TP-5672 11/95
Page 5
Battery
WARNING
Sulfuric acid in batteries. Can cause severe injury or death.
Use protective goggles and clothes. Battery acid can cause permanent damage to eyes, burn skin, and eat holes in clothing.
WARNING
Explosion. Can cause severe injury or death. Relays in battery charger cause arcs or sparks.
Locate in a well-ventilated area. Keep explosive fumes away.
Sulfuric acid in batteries can cause severe injury or death. Sulfuric acid in battery can cause permanent
damage to eyes, burn skin, and eat holes in clothing. Alwayswear splash-proofsafety goggleswhen working around the battery. If battery electrolyte is splashed in the eyes or on skin, immediately flush the affected area for15 minutes withlargequantities of cleanwater. Seek immediatemedicalaidin the caseofeyecontact. Never addacidtoa battery once thebatteryhasbeen placed in service. This may result in hazardous spattering of electrolyte.
Sulfuric acid in batteries can cause severe injury or death. Sulfuric acid in battery can cause permanent
damage to eyes, burn skin, and eat holes in clothing. Alwayswear splash-proofsafety goggleswhen working around the battery. If battery electrolyte is splashed in the eyes or on skin, immediately flush the affected area with large quantities of clean water. Continue flushing with water until emergency help arrives Seek immediatemedicalaidin the caseofeyecontact. Never addacidtoa battery once thebatteryhasbeen placed in service. This may result in hazardous spattering of electrolyte.
Explosioncancause severe injury or death. Battery gases can cause an explosion. Do not smoke or permit flame or spark to occur near a battery at any time, particularly when it is being charged. Avoid contacting terminals with tools, etc., to prevent burns and sparks that could cause an explosion. Remove wristwatch, rings, and any other jewelry before handling battery. Never connect negative (--) battery cable to positive (+) connection terminal of starter solenoid. Do not test batterycondition by shortingterminals together. Sparks could ignite battery gases or fuel vapors. Ventilate any compartment containing batteries to prevent accumulation of explosive gases. To avoid sparks, do not disturb battery charger connections while battery is being changed. Always turn battery charger off before disconnecting battery connections. Remove negative lead first and reconnect it last when disconnecting battery.
TP-5672 11/95
Safety Precautions and Instructions III
Page 6
Hazardous Voltage/ Electrical Shock
DANGER
Hazardous voltage. Will cause severe injury or death.
Do not open enclosure until all power sources are disconnected.
(600 Volt and above)
DANGER
Hazardous voltage. Will cause severe injury or death.
Disconnect power sources before servicing. Barrier must be installed after adjustments, maintenance, or servicing.
(600 Volt and above)
WARNING
WARNING
Hazardous voltage. Can cause severe injury or death.
Do not open enclosure until all power sources are disconnected.
(under 600 Volt)
Hazardous voltage can cause severe injury or death. Whenever electricity is present, there is the
hazardofelectrocution. Openmaincircuitbreaker on all power sources before servicing equipment. Electrically ground the generator set and electrical circuits when in use. Never come into contact with electrical leads or appliances when standing in water oron wet ground, as the chance of electrocution is increased under such conditions.
Hazardous voltage can cause severe injury or death. Short circuits can cause bodily injury and/or
equipment damage. Do not contact electrical connections with tools or jewelry while adjustments are made. Remove wristwatch, rings, and jewelry that can cause short circuits.
Hazardous voltage can cause severe injury or death. To prevent the possibility of electrical shock,
disconnect harness plug before installing any accessories involving connection to transformer assembly primary terminals 76, 77, 78, and 79. Terminals are at line voltage!
(S340, R340, and R33 models only.)
Hazardous voltage can cause severe injury or
Hazardous voltage. Can cause severe injury or death.
Disconnect power sources before servicing. Barrier must be installed after adjustments, maintenance, or servicing.
(under 600 Volt)
IV Safety Precautions and Instructions TP-5672 11/95
death. To prevent the possibility of electrical shock, disconnect harness plug before installing any accessories involving connection to transformer assembly primary terminals on microprocessor logic models. Terminals are at line voltage!
Page 7
Hazardous voltage can cause severe injury or death. To prevent the possibility of electrical shock,
de-energize the normal power source to be connected to the transfer switch before makingany line or auxiliary connections.
Hazardous voltage can cause severe injury or death. De-energize bothnormal and emergencypower
sourcesbefore proceeding. Movegenerator set master switch on controller to OFF position and disconnect battery negative (--) before working on transfer switch! Turn the transfer switch selector switch to the OFF position.
Hazardous voltage can cause severe injury or death. Disconnect inner panel harness at in-line
connector. This will de-energize circuit board and logic circuitry, but allow transfer switch to continue to supply utility power to necessary lighting and equipment. Hazardousvoltage will exist ifanyaccessories mounted to inner panel are NOT wired through the inner panel harness and de-energized by in-line connector separation. Such accessories are at line voltage.
TP-5672 11/95
Safety Precautions and Instructions V
Page 8
Heavy Equipment
WARNING
Unbalanced weight. Improper lift can cause severe injury or death and/or equipment damage.
Use adequate lifting capacity. Never leave transfer switch standing upright unless it is securely bolted in place or stabilized.
VI Safety Precautions and Instructions TP-5672 11/95
Page 9
Notes
NOTE
Hardware Damage! Transfer switch may use both
American standard and metric hardware. Use the correct size tools to prevent rounding of bolt heads and nuts.
NOTE
When replacing hardware, do not substitute with inferior grade hardware. Screws and nuts are
available in different hardness ratings. American Standard hardware uses a series of markings and metric hardware uses a numeric system to indicate hardness. Check markings on bolt head and nuts for identification.
NOTE
A manual operator handle is provided on the transfer switch for maintenance purposes only. Return the transfer switch to the normal position. Remove manual operator handle (if used) and store it on the transfer switch in the placeprovided when service is completed.
NOTE
Perform voltage checks in the order given to avoid damaging the switch.
NOTE
These battery chargers are designed strictly for use in thistransfer switch andconform with ULand CSAlisting requirements where specified. Do not use battery charger before reading instructions.
NOTE
Connect source and load phases as indicated by the markings and drawings. Improper connections may causeshortcircuitsand can causephase-sensitiveload devices to run in reverse or prevent load devices from functioning.
NOTE
Charger Damage! Connect battery charger only to a
batterywith thesame DC voltage as the battery charger output rating.
NOTE
Covertransferswitchduring installation to keepdirt,grit, metal drill chips, etc., out of components. Cover solenoid mechanism during installation. After installation, use manual operating handle to position contactor to ensure that it operates freely. Do not use a screwdriver to force contactor mechanism.
TP-5672 11/95
Safety Precautions and Instructions VII
Page 10
Introduction
This manual covers the operation, troubleshooting, repair,and service parts for the M340+ microprocessor logic controller.
Read through this manual and carefully follow all procedures and safety precautions to ensure proper transferswitchoperationandtoavoidbodilyinjury.Keep this manual with the transfer switchfor futurereference.
Service requirements are minimal but are very important to the safe and reliable operation of the transfer switch; therefore, inspect associated parts often. It is recommended that an authorized service distributor perform required servicing to keep the switch in top condition.
All information found in this publication isbased on data availableat timeof printing. The manufacturerreserves the right to make changes to this literature and the products represented at any time without notice and without incurring obligation.
List of Related Manuals
The logic controller covered in this manual is part of a family of related devices. Separate service and parts manuals are available for each group within the overall family. Be sure this manual is the correct manual for the automatic transfer switch.
A power conversion unit is included in each automatic transfer switch. There are three types of power conversion units and each type is covered in a separate service and parts manual. Available power conversion units and the related manual numbers are as follows:
Service/
Power Switch Device
Mechanically held or electrically held contactors
Molded-case circuit breakers or switch
Standard contactor, programmed transition, and Bypass-Isolation
Parts Manual
TP-5667
TP-5666
TP-5668
Service Assistance
For sales and service in the U.S.A. and Canada check the yellow pages of the telephone directory under the headingGENERATORS—ELECTRICfor anauthorized service distributor/dealer or call 1-800-544-2444.
KOHLER CO., Kohler, Wisconsin 53044 U.S.A. Phone: 920-565-3381 Fax: 920-459-1646 (U.S.A. Sales)
920-459-1614 (International)
To ensure supply of correct parts or information, make note of the following identification numbers in the spaces provided:
PART NUMBER AND SERIAL NUMBER
Part and serial numbers are provided on the nameplate attached to the transfer switch.
Part No.
Serial No.
TP-5672 11/95 Introduction i
Page 11
Notes
TP-5672 11/95Introduction ii
Page 12
Section 1. Specifications
Purpose of Switch
An automatic transfer switch (ATS)is a device used for transferring critical electrical loads from a normal (preferred) source of electrical power to an emergency (standby) source. This transfer occurs automatically when the normal source voltage fails, or is substantially reduced, and the emergency source’s voltage has reached an acceptable level.
Upon normal source failure, the automatic transfer switchcontrollersignalsthe generator set(s)tostartand
Components of Switch
A typical automatic transfer switch includes the actual power switching device and the logic controller to perform power monitoring and transfer sequencing tasks. See Figure 1-1. An interface board is also included to match the controller inputs/outputs to the levels required by a specific switching device.
The three functional units that make up the automatic transfer switch are mounted in an enclosure with a hinged front door. The controller mounts on the back of thefront doorso its controls and indicatorsare available to an operator. A signal cable with in-line connectors to facilitate component replacement and door removal connects the controller to the interface board and the switching devices.
transfer to the emergency source. The automatic transfer switch controller continuously senses for an acceptable normal source and will retransfer the load to the normal source after it has been restored to an acceptable level. After retransfer of the load, the generator set start signal is removed and the generator set(s) is allowed to shut down.
1
2
TP-5672 11/95
3
1. Power Conversion Unit
2. Interface Panel
3. Logic Controller
Figure 1-1. Transfer Switch Components
Specifications 1-1
567111
Page 13
Normal (Utility)
Power
Emergency (Generator) Power
Generator
Start Generator
Power Switching Device
To Load
Figure 1-2. Basic Transfer Switch Block Diagram
Ratings
Anameplate is attachedtotheautomatic transfer switch enclosure. See Figure 1-3. The nameplate label includes a factory part number coded to provide characteristic and rating information that affects installationandoperation. Copy the partnumberinto the blank spaces provided in the introduction and then use the charts in Figure 1-4 to interpret the part number.
NOTE
Also copy the part number and serial number from the nameplate into the spaces provided in the Service Assistance Section of the Introduction for use when requesting service or parts.
Interface
Logic
Controller
Automatic Transfer Switch
AUTOMATICTRANSFER SWITCH
PARTNO. ZCS-160341-0800
SERIAL NO. VOLTS PHASE HERTZ
KOHLER CO. KOHLER WISCONSIN 53044
567112
KOHLER
AMPS WIRES POLES
295232
Figure 1-3. Transfer Switch Nameplate
1-2 Specifications TP-5672 11/95
Page 14
Interpreting a Transfer Switch Part Number
Record the transfer switch part number in the boxes below. The transfer switch part number defines characteristics and ratings as explained in the accompanying chart.
Type of Switch Type of Logic Voltage & Frequency
Number of
Poles
Number of
Wires
Type of
Enclosure Amperage Rating Code
Kohler Part Number Key
This chart explains the Kohler transfer switch part numbering code system. The sample part number shown is for a standard molded-case switch with M340+ logic rated at 480 volts, 60 hertz, 3-phase, 3-pole, and 4 wires in a NEMA 1 enclosure with an amperage rating of 80 amperes.
Classification of Power Switch
M: Switch or Circuit Breaker T: Electrically & Mechanically Held Z: Contactor Style
Type of Power Switch
C: Contactor E: Electrically Held Contactor L: Mechanically Held Contactor M: Molded-Case Circuit Breaker N: Molded-Case Switch (no protection)
Type of Switch
S: Standard B: Bypass
Type of Logic
5: M340+ 6: M340+ with programmed transition
Voltage Code
60:600 Volt, 60 Hz 66: 480 Volt, 60 Hz 62:120 Volt, 60 Hz 68: 208 Volt, 60 Hz 63:220 Volt, 50 Hz 71: 380 Volt, 50/60 Hz 64:240 Volt, 60 Hz
SAMPLE PART NUMBER
MNS-566341-0080
Number of Poles
2: 2 pole, 1 phase (MM_, MN_, TE_, TL_, devices
will be supplied with 3 poles) 3: 3 pole, 3 phase 6: 4 pole, fully rated switched poles
(no overlapping neutral)
Number of Wires
2: 2 wire 3: 3 wire 4: 4 wire
Enclosure
1: NEMA type 1
Amperes
Available sizes vary with the type of switch.
Figure 1-4. Transfer Switch Model Description
TP-5672 11/95
Specifications 1-3
Page 15
Specifications
The specifications listed below are for the M340+ logic controller. See the respective power switching device manual for its specifications.
Standard Features
D Normal source voltage sensing adjustable from
75% to 130% of normal for pickup and from 70% to 135% for dropout; provides monitoring line-to-line for all phases of 3-phase switches.
D TDNE (Time Delay Normal-to-Emergency)
adjustable 0 to 5 minutes.
D TDES (Time Delay Engine Start) adjustable from
0 to 6 seconds.
D TDEN (Time Delay Emergency-to-Normal)
adjustable 0 to 30 minutes.
D Program Transition (Center off)—time delay
during transfer with neither source connected to the load. Adjustable 0 to 2 minutes.
D LCD digital voltmeter. D LCD digital running time meter.
D LCD digital transfer counter. D LCD digital frequency meter. D Status panel with keypad data entry. D Area protection with override. D TDEC (Time Delay Engine Cooldown) adjustable
from 0 to 30 minutes.
D Generator engine start contacts. D Indicators for switch position—normal and
emergency.
D Indicators for source available—normal and
emergency.
D Lamp test switch, momentary. D Underfrequency sensing—one phase emergency
source only.
1-4 Specifications TP-5672 11/95
Page 16
Shunt-Jumper-Controlled Accessories
Enable or disable shunt-jumper-controlled accessories by altering socket JP1 on the main logic board. See Figure 1-5. All shunt-jumper features are disabled from thefactoryunlessthe function was ordered atthetimeof purchase. But features can be enabled after factory delivery by adding jumpers to the JP1 socket.
Main Logic Board
JP1
MANUAL
TIME
PLANT
VOLT/
PHASE
OFF
Figure 1-5. Logic Board Accessory Programming
Shunts
D Manual Override. Enabling manual override
allows automatic transfer to an available source when the connected source fails. Transfer time delays will be bypassed. Disabling manual override causes the logic board to wait for manual operation. The logic board will not automatically seek the available source.
D Inphase Monitor. Abnormal inrush currents from
switching between two live power sources can damage motors and related equipment. The purpose of the inphase monitor is to minimize abnormal inrush currents to equipment when the ATS transfers from one source to a new power source. The inphase monitor samples a single phase of one source and compares it to a single phase of the other source. When the two voltages are within the desired phase angle and approaching a zero phase angle difference, the inphase monitor signals the transfer switch to
OVRIDE DELAY EXER FREQ SEQUENCER MONITORIN-PHASE DELAYS
567215
operate. The transfer may be from utility to generator,from generator to generator,or utility to utility.
NOTE
This option is available only on contactor type, nonprogrammed transition switches. If the contactor is not of this type, then the controller will not allow this option to be enabled. Enable this accessory by installing the INPHASE MONITOR jumper on the controller’s main logic board.
D Phase Rotation and Anti-Single Phasing. This
function provides source monitoring for both the normal and emergency sources. The feature includesphaserotation(A B C only)andanti-single phase protection. This option must be used in conjunction with accessory DD-05-K in order to provide source monitoring on the emergency side. Enable this accessory by installing the PHASE SEQUENCER jumper on the controller’s main logic board.
D Normal and Emergency Source Sensing. This
function provides overvoltage sensing on all phasesof the normalsource,over/underfrequency sensing on one phase of the normal source, overvoltage sensing on one phase of the emergency source, and overfrequency sensing on one phase of the emergency source. Enable this accessory by installing theVOLT/FREQjumper on the controller’s main logic board.
D Plant Exerciser. This function enables a no-load
plantexerciser.Userhasachoice of 7-day,14-day, or calendar-based exercise modes. Enable this accessory by installing the PLANT EXER jumper on the controller’s main logic board.
D Extended Time Delay. This function extends the
time delay to 99 minutes for TDNE, TDES, TDEN, TDOE, TDON, and TDEC. Enable this accessory by installing the TIME DELAY jumper on the controller’s main logic board.
D Off Position Time Delay. This function enables
the time delay during transfer when neither source is connected to the load. Enable this accessory by installing the OFF DELAYS jumper on the controller’s main logic board.
Optional Accessories
See Appendix C for details of optional accessories. The nameplate includes a list of the accessories selected. See Figure 1-3.
TP-5672 11/95
Specifications 1-5
Page 17
Section 2. Operation
Control Switches and Indicators
Various optional control switches and indicator lamps may be present on the transfer switch door depending
AUTO
TRANSFER
MANUAL
TRANSFER TO
EMERGENCY
MANUAL
TRANSFER TO
OFF
MANUAL
TRANSFER TO
NORMAL
MANUAL
TRANSFER
TEST SWITCH
NORMAL TEST
BYPASS
EMERGENCY TO
NORMAL TIME DELAY
BYPASS NORMAL
TO EMERGENCY
TIME DELAY
AUTO INHIBIT
Contactor Position Time Delays
Normal On EndEmergency
·
Source Available
Normal Emergency
· ·
System Status
Not In Automatic
· ·
Programming Mode Not in Off
·
Flashing, Local Steady,Remote
· ·
Plant Exerciser Load Shed Inphase Monitor Area Protection
· · · ·
Off
·
·
System Alert
Accessory Active
on the options chosen. See Figure 2-1 for LED, Switch, and Key locations.
Engine Start
·
·
Normal To Emergency
·
·
Emergency To Normal
·
·
Engine Cooldown
·
·
Off Position
·
·
Figure 2-1. Front Panel
LED Indicators
Contactor Position. LEDs indicate transfer switch
position—NORMAL (green), EMERGENCY (red), or OFF (yellow).
Source Available. LEDs indicate source with acceptable voltage and frequency—Normal (green) and/or Emergency (red).
System Status
Not in Automatic (red). LED flashes to indicate that
Test switch is actuated, or Auto/Manual switch is in the Manual position.
System Alert (red). LED flashes to indicate possible problem with contactor or logic operation. System alert will also flash if any fault signals are received from the generator set.
Programming Mode Not in Off (yellow). LED flashes to indicate that programming switch is in the LOCAL position. A steady, nonflashing light indicates that the programming switch is in the REMOTE position.
Operation 2-1TP-5672 11/95
Page 18
Time Delays
Engine Start (If emergency source is a generator set).
ON LED indicates that engine-start time delay is timing. ENDLED indicates thattheengine has been signaledto start.
Normal to Emergency. ON LED indicates that the normal-to-emergency time delay is timing. END LED indicates that the time delay has completed timing.
Emergency to Normal. ON LED indicates that the emergency to normal time delay is timing. END LED indicates that the time delay has completed timing.
transfer from emergency to normal and normal to emergency when sources are near synchronization.
NOTE
When a programmed transition switch is ordered, the inphase monitor option is disabled by the microprocessor.
Area Protection. Area protection LED indicates that the controller is in the area protection mode. The generator will be signaled to START and the contactor will transfer to the emergency positionand remain there while in area protection.
Engine Cooldown. ON LED indicates that the generator set engine cooldown timer is timing. END LED illuminates until the engine has shut down.
Off Position. ON LED indicates that the time delay off positionistiming. ENDLEDindicatesthatthetimedelay has completed timing.
Accessory Active
Plant Exerciser. Plant excerciser LED indicates that
the system is in the exerciser mode. LoadShed. LoadshedLEDindicates that programmed
load shedding is active. Inphase Monitor (availableon ZCtype powerswitches
only). Inphase monitor LED indicates that the sources are being monitored for phase relationship to allow inphase transfer. The inphase monitor will permit
Control Switches
Test Switch (Standard). Move the test switch to the
TEST position to simulate a normal source outage. Not-in-Automatic system status light will flash.
Bypass N-E Time Delay Pushbutton Switch (Option). If the bypass normal-to-emergency time
delay pushbutton is pressed when normal-to-emergency time delay is on, time delay will end.
Bypass E-N Time Delay Pushbutton Switch (Option). If the bypass normal-to-emergency time
delay pushbutton is pressed, when emergency-to-normal time delay is on, time delay will end.
Manual Transfer to Emergency Switch (Option).
When the transfer switch control is in the manual mode of operation and manual to emergency is required, press the manual transfer-to-emergency pushbutton to
Programming Mode Switch
NOTE
Theprogramming modeswitch keysshould bekept ina safe place to prevent unwanted tampering with the transfer switch control. Do not leave the programming switch in the LOCAL position with the transfer switch unattended.
Remote. Allows both status monitoring and setting of the transfer switch controls by a connected personal computer.
Off. Transfer switch status settings and power source may be monitored from the local LCD display or connected computers.
Local. Allows both status monitoring and setting of transfer switch control from the microprocessor’s LCD display and keypad.
cause the transfer switch to transfer to the emergency position.
Manual Transfer to Off Switch (Option). When the transfer switch control is in the manual mode of operation and manual to off is required, press the manual transfer-to-emergency pushbutton to cause the transfer switch to transfer to the off position.
Manual Transfer to Normal Switch (Option). When the transfer switch control is in the manual mode of operation and manual to normal is required, press the manual transfer-to-emergency pushbutton to cause the transfer switch to transfer to the normal position.
Auto/Inhibit Switch (Option). If the auto/inhibit switch is in the AUTO position, the transfer switch will operate normally. If the switch is in the Inhibit position, the transfer switch will not transfer under any conditions.
2-2 Operation TP-5672 11/95
Page 19
Sequence of Operation
This section describes the correct operation of a microprocessor-controlled transfer switch.
Sequence of Operation Standard Switch
When the Normal Source Fails
1. The source-available normal LED turns off.
2. The time-delay-engine-start ON LED illuminates to indicate the engine-start-time-delay is timing.
3. The time-delay-engine-start END LED illuminates to indicate the engine has been signaled to start.
4. The source-available emergency LED illuminates.
5. The time-delay normal-to-emergency ON LED illuminates to indicate the normal-to-emergency time delay is timing.
6. The time-delay normal-to-emergency END LED illuminates to indicate the time delay has completed timing.
7. The load-shed LED illuminates at the same time all loads to be shed are disconnected from the switch (if equipped with load-shed option).
8. The inphase monitor LED illuminates (if equipped with inphase monitor option on ZC type power switches only). The controller monitors the two voltagesto makesure theyare ata desiredphase angle and approaching zero phase angle difference.
9. The contactortransfers tothe emergency position after the load-shed time-before-transfer timer has completed timing. The contactor-position normal LED turns off and the contactor-position emergency LED illuminates. The inphase monitor LED turns off.
10. After the load-shed time-after-transfer timer has completed timing, the selected loads for the emergencysource are nowreturnedto the switch. The load-shed LED turns off (if equipped with load-shed option).
Operation 2-3TP-5672 11/95
Page 20
When the Normal Source Returns
1. The source-available, normal LED illuminates.
completed timing. The contactor-position emergency LED turns off and the contactor-position normal LED illuminates.
2. The time-delay emergency-to-normal ON LED illuminates to indicate the emergency-to-normal time delay is timing.
3. The time-delay emergency-to-normal END LED illuminates to indicate the time delay has completed timing.
4. The load-shed LED illuminates at the same time all loads to be shed are disconnected from the switch (if equipped with load-shed option).
5. The inphase monitor LED illuminates (if equipped with load-shed option).
6. The contactor transfers to the normal position after the load-shed time-before-transfer timer has
7. After the load-shed time-after-transfer timer has completed timing, the selected loads for the normal source are returned to the switch. The load-shed LED turns off (if equipped with load-shed options).
8. The time-delay engine-cooldown ON LED illuminates to indicate the generator set engine cooldown timer is timing.
9. The time-delay engine-cooldown END LED stays illuminated until the generator has shut down.
10. The source-available, emergency LED turns off.
2-4 Operation TP-5672 11/95
Page 21
Microprocessor-Controlled Transfer Logic
Standard Switch
Normal Source Failure
Time Delay Engine Start
Time Delay Normal-to-Emergency
Load Shed (all)—if equipped
Inphase Monitor—if equipped
Contactor Transfer to Emergency Position
Load Return (programmed sequence)—if equipped
Normal Source Return
Time Delay Emergency-to-Normal
Load Shed (all)—if equipped
Inphase Monitor—if equipped
Contactor Transfer to Normal Position
Load Return (programmed sequence)—if equipped
Time Delay Engine Cooldown
Operation 2-5TP-5672 11/95
Page 22
Sequence of Operation Programmed Transition Switch
When the Normal Source Fails
NOTE
When a programmed transition switch is ordered, the inphase monitor option is disabled by the microprocessor.
1. The source-available, normal LED turns off.
2. The time-delay-engine-start ON LED illuminates to indicate the engine-start-time-delay is timing.
3. The time-delay-engine-start END LED illuminates to indicate the engine has been signaled to start.
4. The source-available emergency LED illuminates after the generator is at rated voltage and frequency.
5. The time-delay normal-to-emergency ON LED illuminates to indicate the normal-to-emergency time delay is timing.
6. The time-delay normal-to-emergency END LED illuminates to indicate the time delay has completed timing.
7. The load-shed LED illuminates at the same time all loads to be shed are disconnected from the switch (if equipped with load-shed option).
8. After the load-shed time-before-transfer timerhas completed timing, the contactor transfers to the Off position. The contactor-position normal LED turns off and the contactor-position Off LED illuminates.
9. The time-delay-off-position ON LED illuminates to indicate the Off position time delay is timing.
10. The time-delay-off-position END LED illuminates to indicate the time delay has completed timing.
11. The contactor transfers to the emergency position. The contactor-position Off LED turns off and the contactor-position emergency LED illuminates.
12. After the load-shed time-after-transfer timer completes timing, the selected loads for the emergencysource arereturned to the switch. The load-shed LED turns off (if equipped with load-shed option).
2-6 Operation TP-5672 11/95
Page 23
When the Normal Source Returns
1. The source-available, normal LED illuminates.
2. The time-delay emergency-to-normal ON LED illuminates to indicate the emergency-to-normal time delay is timing.
3. The time-delay emergency-to-normal END LED illuminates to indicate the time delay has completed timing.
4. The load-shed LED illuminates at the same time all loads to be shed are disconnected from the switch (if equipped with load-shed option).
5. After the load-shed time-before-transfer timerhas completed timing, the contactor transfers to the Off position. The contactor-position emergency LED turns off and the contactor-position Off LED illuminates.
6. The time-delay off-position ON LED illuminates to indicate the off-position-time-delay is timing.
7. The time-delay off-position END LED illuminates to indicate the time delay has completed timing.
8. The contactor transfers to the normal position. The contactor-position OFF LED turns off and the contactor-position normal LED illuminates.
9. After the load-shed time-after-transfer timer has completed timing, the selected loads for the normal source are returned to the switch. The load-shed LED turns off (if equipped with load-shed option).
10. The time-delay-engine-cooldown ON LED illuminates to indicate the generator set engine cooldown timer is timing.
11. The time-delay-engine-cooldown END LED stays illuminated until the generator has shut down.
12. The source-available emergency LED turns off.
Operation 2-7TP-5672 11/95
Page 24
Microprocessor-Controlled Transfer Logic
Programmed Transition Switch
Normal Source Failure
Time Delay Engine Start
Time Delay Normal-to-Emergency
Load Shed (all)—if equipped
Contactor Transfer to Off Position
Time Delay Off-to-Emergency
Contactor Transfer to Emergency Position
Load Return (programmed sequence)—if equipped
Normal Source Return
Time Delay Emergency-to-Normal
Load Shed (all)—if equipped
Contactor Transfer to Off Position
Time Delay Off-to-Normal
Contactor Transfer to Normal Position
Load Return (programmed sequence)—if equipped
Time-Delay-Engine-Cooldown
2-8 Operation TP-5672 11/95
Page 25
To Disconnect The P1 Plug
1. If the transfer switch isin the normal position, open the emergency-source circuit breaker.
it is available, after a time delay. For immediate retransfer, open and then reclose the emergency-source circuit breaker. Place the generator set start switch in the AUTO position.
2. If the transfer switch is in the emergency position, open the normal-source circuit breaker.
3. Separate the in-line disconnect plug by grasping and squeezing the plug. Do NOT pull on the wires.
560423
Electrical Operation Test
Place the transfer switch in the NORMAL position. Use thefollowing procedureto check theelectrical operation of the automatic transfer switch:
1. Press andhold the testpushbutton for 15seconds. See Figure 2-1.
2. The generator set should start and run after the time delay engine start (TDES) completed timing.
3. The transfer switch will transfer to the emergency position. The transfer occurs after the normal-to-emergency time delay (TDNE) has completed timing.
4. Release the test pushbutton. The transfer switch retransfers to normal after the emergency-to-normal time delay.
5. Time delay engine cooldown (TDEC) allows the engineto continue running foranunloaded running time. The transfer switch TDEC will complete timing before any TDEC function in the generator set controller begins timing.
6. Close load circuit breaker(s) when loads may be safely energized.
Figure 2-2. In-Line Disconnect Plug
To Reconnect The P1 Plug
1 Engage the in-line disconnect plugby grasping the
connectors and pressing them together. See Figure 2-2.
2 If thetransfer switch isin the normalposition, place
thegenerator set startswitchin the AUTOposition. Then close the emergency-source circuit breaker.
3. If the transfer switch is in the emergency position, close the normal-source circuit breaker. The load willautomatically retransferto the normalsource, if
NOTE
Connecting the transfer switch in-line disconnect plugs(P1)togetherwhen the generator controller’s master switch is in the AUTO position causes the generator set to IMMEDIATELY start and run until the generator set controller’s cooldown timer completes timing.
This completes functional tests of the transfer switch. Leave the AUTO/MANUAL switch in the AUTO TRANSFER position.
Operation 2-9TP-5672 11/95
Page 26
Section 3. Troubleshooting Guide
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1. Refer to Figure 3-1 as a guide to troubleshooting problems with
Problem Refer to Section 4—Controller Troubleshooting
None of the LEDs are on and the LCD is blank Power to the system Pressing a key on the keypad does not supply the appropriate
response Every LED does not turn on and every character block on the LCD
does not blacken The normal source should be available but the Source-Available,
Normal LED is not on The emergency source should be available but the
Source-Available, Emergency LED is not on The Automatic/Test pushbutton is pressed, the Automatic/Inhibit
switch (option DD-09) is set to Inhibit, or the Automatic-Transfer key switch (option DD-29) is set to manual, but the System-Status, Not-In-Automatic LED is not flashing
The System-Status, System-Alert LED is flashing; check the LCD for a message
The LCD displays Auxiliary-Switch Fault or Double Auxiliary--Switch fault message
The LCD displays Transfer Hang error message Transfer hang error message The LCD displays Power-Down error message Power-down error message The LCD displays RAM or Memory error message RAM or memory error message The Programming-Mode-Not-In-Off LED is flashing Programming-mode-not-in-off The engine operates when it should not be operating Engine operates when it should not The engine should start Engine will not start One of the control options is not working (the control options
include the inphase monitor, source-phase-sequence, normal/emergency voltage/frequency sensing, plant exerciser, extended time delay,and manual override)
the microprocessor logic controller. Refer to Figure 3-2 as guide to troubleshooting problems with the microprocessor accessories.
Keypad and status panel
Keypad and status panel
Source-available, normal error
Source-available, emergency error
System-status, not-in-automatic error
System-status, system-Alert error
Auxiliary-switch fault or double auxiliary-switch fault error message
Shunt-jumpered controlled options
TP-5672 11/95
Figure 3-1. Microprocessor logic controller troubleshooting chart
TroubleshootingGuide
3-1
Page 27
Problem Refer to Section 5—Accessory Troubleshooting
Controller will not sense three-phase emergency voltage Phase sequencer,accessory DD-05 The generator set does not start when the test switch is in the
Test switch, accessory DD-06 and DD-07
engine start position The generator set does not start when the test switch is in the test
Test switch, accessory DD-06 and DD-07
position The normal-to-emergency time delay pushbutton does not work Time delay override, accessory DD-08 The emergency-to-normal time delay pushbutton does not work Time delay override, accessory DD-08 The auxiliary dry contacts relay boards do not operate Relay auxiliary dry contacts, accessory DD-14 The analog meters are not working Meters, accessory DD-18 The battery charger is not working Battery charger, accessory DD-24 The manual transfer to emergency source does not work Manual operation switches, accessory DD-29 The manual transfer to normal source does not work Manual operation switches, accessory DD-29 The manual transfer to off does not work Manual operation switches, accessory DD-29 The auto/manual switch does not work in the manual position Manual operation switches, accessory DD-29 The auto/manual switch does not work in the auto position Manual operation switches, accessory DD-29 The load shed contacts do not work Load-shed contacts, accessory DD-35 Problems with remote communication exist Remote communication—RS/232 or RS/485, accessory
DD-51
Figure 3-2. Accessory troubleshooting chart
3-2 TroubleshootingGuide
TP-5672 11/95
Page 28
Section 4. Controller Troubleshooting
The following section will assist in solving common problems with the M340+ controller. Note any optional accessoriesthatmayhavebeenfurnishedonthisswitch
Is the LCD screen blank and no LEDs illuminated?
Is there 19 vac between terminals TB-AC1-NAS and TB-AC1-NCS of the power supply board?
No
Yes
Replace the power supply board.
Is a battery connected to terminals TB-DC1-29 and TB-DC1-34 of the power supply board?
Yes
Is there rated battery voltage between terminals TB-DC1-29 and TB-DC1-34 of the power supply board?
No
Check battery and wiring from battery to assembly for open of shorted leads.
Is an optional remote communications board installed?
Yes No
Is there 10 vdc between pin P2-13 of plug 2 and terminals TB-DC1-34 of the power supply board?
Is there normal source voltage between terminals TB-AC1-NA and TB-AC1-NC of the power supply board?
Is there 10 vdc between terminals TB-DC1-30 and TB-DC1-34 of the power supply board?
No
Replace the load-shed board.
No
and review their operation in section 5—Accessory Troubleshooting.
No
Yes
Is there from 12 to 30 vdc
No
Yes
Yes Yes
Yes
between terminals TB-DC1-23 and TD-DC1-34 of the power supply board?
Replace the logic board.
Yes
Troubleshooting complete.
Check the normal source and contactor-to-power supply board wiring harness for open or shorted leads.
Yes
Is there an optional load-shed board installed?
No
Disconnect the load-shed board.
Yes
Recheck the voltage at terminals TB-DC1-23 and TB-DC1-30 of the power supply board, and pin P2-13 of plug 2. Are the voltages correct?
No
No
Yes
Disconnect the communications board.
Recheck the voltage at terminals TB-DC1-23 and TB-DC1-30 of the power supply board, and pin P2-13 of plug 2. Are the voltages correct?
No
Replace the logic board.
TP-5672 11/95
No
Recheck the voltage at terminals TB-DC1-23 and TB-DC1-30 of the power supply board, and pin P2-13 of plug 2. Are the voltages correct?
Yes
Yes
Replace the remote communication board.
Yes
Replace the power supply board.
Figure 4-1. Troubleshooting—Power to the system
Yes
No
Recheck the voltage at terminals TB-DC1-23 and TB-DC1-30 of the power supply board, and pin P2-13 of plug 2. Are the voltages correct?
Disconnect the status panel board.
Disconnect the logic board.
No
Controller Troubleshooting
No
Yes
Replace the logic board.
4-1
Page 29
Power to the System
Ifthereisaproblemwiththelogicboard,thefirststepisto check the status panel. If no LEDs on the status panel are illuminated and the liquid crystal display (LCD) is blank, check the power to the system by performingthe following steps. See Figure 4-1 for the Power to the System troubleshooting flowchart. See Appendix B Figure B-4 for location of power supply board components referred to in this section. See Appendix B FigureB-6forlocationanddescriptionofP2ribboncable pins. See Appendix B Figure B-9 for location of main logic board components referred to in this section.
1. Using a voltmeter, connect one test lead to TB-AC1-NA. Connect the other test lead to TB-AC1-NC. If the voltmeter does not read the expected normal source voltage,check the normal sourceandthecontactor-to-assemblyharness,P1.
2. If thenormalsourcevoltageispresent,connectone test leadto TB-AC1-NAS and the other test leadto TB-AC1-NCS. If the voltmeter does not read approximately 19 volts AC, the secondary normal source voltage, check that the transformer is wired correctly. If the transformer is wired correctly and the voltmeter still does not read 19 volts AC, disconnect transformer secondary wires andretest transformer secondary voltage to determine if the transformer or the logic board assembly is at fault.
3. If boththenormalsourcevoltageandthesecondary normal source voltage are present, connect one test lead to TB-AC1-EA and the other test lead to TB-AC1-EC. If the voltmeter does not read the expected emergency source voltage, check the emergency source and the contactor-to-assembly harness, P1.
4. If theemergencysourcevoltageispresent,connect one test lead to TB-AC1-EAS and the other test leadtoTB-AC1-ECS.If thevoltmeterdoesnot read approximately19voltsAC,theexpectedsecondary emergency source voltage, check that the transformer is wired correctly. If the transformer is wiredcorrectly andthe voltmeter still doesnot read 19 volts AC, disconnect transformer secondary wires and retest transformer secondary voltage to determine if the transformer or the logic board assembly is at fault.
5. If the emergency source, normal source, and transformers are all working properly, and the batteryback-upoptionisused,connectthe positive testleadtoTB-DC1-29andthe negativetestleadto TB-DC1-34.If thevoltmeterdoesnot read between 12and30voltsDC,expectedbatteryvoltage,check the battery-to-assembly wires and the battery.
6. Connect the positive test lead to TB-DC1-23, and the negative test lead to TB-DC1-34. If the voltmeter does not read betweenapproximately12 and30voltsDC,checkifanaccessoryisconnected toTB-DC1-23.Ifthereisanaccessoryconnectedto TB-DC1-23,disconnectit. If the voltmeter stilldoes notread between12and30 voltsDC, performstep
9.
NOTE
When taking a voltage or resistance measurement at a ribbon cable pin, do not disconnect the ribbon cable from the board. Use a needle point probe to take the readings from the holes on the top side of the ribbon cable connector.
7. Connect the positive test lead to P2-13, and the negative test lead to TB-DC1-34. If the voltmeter does not read approximately 10 volts DC, perform step 9. See Appendix B Figure 6 for location of P2 ribbon cable pins.
8. Connect the positive test lead to TB-DC1-30 and the negative test lead to TB-DC1-34. If the voltmeterdoesnotreadapproximately10voltsDC, perform step 9.
9. If eachofthemeasurementstakeninsteps6,7,and 8 was correct, this step may be skipped.
a. Disconnect the main logic board ribbon cable
from P2, and recheck the voltages in steps 6, 7, and8. If thevoltagereadings in steps 6,7, and8 are now correct, the main logic board is defective. Replace the logic board assembly.
b. If the logic board is equipped with a load shed
board, disconnect the load shed ribbon cable from P10 on the main logic board, and recheck the voltages in steps 6, 7, and 8. If the voltage readings in steps 6, 7, and 8 are now correct, replace the Load Shed board.
c. If the logic board is equipped with a remote
communications board, disconnect the remote communications ribbon cable from P12 on the main logic board, and recheck the voltages in steps6, 7, and 8. If thevoltagereadings in steps 6, 7, and 8 are now correct, replace the remote communications board.
d. Disconnect the status panel ribbon cable from
P4,andrecheckthevoltagesinsteps6,7, and8. If the voltage readings in steps 6, 7, and 8 are now correct, the status panel is defective. Replace the logic board assembly.
e. If the voltages measured in steps 6, 7, and 8
were never correct, replace the power supply board.
4-2 Controller Troubleshooting
TP-5672 11/95
Page 30
Keypad And Status Panel
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
1. Testthe keypadby pressinga keyandcheckingthe response.If theresponseiscorrect,repeatthisstep until satisfied that there is not a problem with the keypad. If the response is ever incorrect, the keypad is defective. Replace the logic board assembly.
2. Press the LAMP TEST key on the keypad.
3. If afterpressingtheLAMPTEST keysomeLEDson thedisplaypanelareon, butat leastoneLED isnot on, the status panel is defective. Replace the logic board assembly.
4. If after pressing the LAMP TEST key some of the character blocks on the LCD appear black, but at least one character block is not black, the status panel is defective. Replace the logic board assembly.
5. If after pressing the LAMP TEST key no LEDs are on, and the character blocks in the LCD are black, verify that there is power to the system by performing the steps outlinedin Section 4—Power To The System. Check the P2 and P4 ribboncable connections by performingthefollowingsteps. See Appendix B FigureB-9 for locationof ribboncables andotherpowersupplyboardcomponentsreferred to in this section.
a. Disconnect all power sources. b. Wait 30 seconds.
c. Being careful not to bend or break any of the
pins, remove both P2 and P4 ribbon cable connectors.
d. Inspect the pins on the P2 and P4 ribbon cable
connectors.
e. If pinsarebent,carefullybendthemback. Ifpins
are broken, replace the ribbon cable connector.
f. Carefully reconnect P2 and P4 ribbon cable
connector.
g. If the problem still exists,replacethe logic board
assembly.
560442
Figure 4-2. The M340+ LCD display during a lamp
test
TP-5672 11/95
Controller Troubleshooting
4-3
Page 31
If the normal source is available, but the source available normal LED is not illuminated. Check the trip point settings in index 6. See TP-5664 for programming information. Are the trip points programmed correctly?
Yes
Does the microprocessor display,in index 1, rated normal source voltages and frequency?
No
Correct the trip point settings in index 6. See TP-5664 for programming information.
Is the transfer switch wire with a phase
Yes
rotation of ABC?
Yes
No
Replace the logic board.
Calibrate the normal source voltage.
Yes
Does the voltage between terminals TB-AC1-NA and TB-AC1-NB and terminals TB-AC1-NB and TB-AC1-NC of the power supply board equal the rated voltage for the transfer switch?
No
Check the normal source voltage and the wiring harness from the contactor to power supply board for open or shorted leads.
Yes
Is the inphase sequence option installed?
Yes
Does the voltage between terminals TB-AC1-NC and TB-AC1-NA of the power supply board equal the rated voltage for the transfer switch?
No
Is 3-phase sensing used?
No
Check the normal source voltage and the wiring harness from the contactor to power supply board for open or shorted leads.
Is the voltage between pin P2-15 of
Yes
plug 2 and terminal TB-DC1-34 of the power supply board 1/25 of line voltage? See Appendix B Figure B-5.
Yes
Turn the generator set off. Jumper terminal TB-DC1-24 to TB-DC1-34 of the power supply board . Is the voltage between pin P2-15 of plug 2 and terminal TB-DC1-34 of the power supply board equal to 0 vac?
No
No
Replace the power supply board.
No
Replace the power supply board.
No
Yes
Is 3-phase sensing used?
Yes
No
Calibrate the controller’s normal source voltage.
Is the voltage between pin P2-18 of plug 2 and terminal TB-DC1-34 of the power supply board 1/25 of line voltage? See Appendix B Figure B-5.
Yes
Replace the power supply board.
Rewire the source for ABC phase rotation.
Figure 4-3. Troubleshooting—Source-available, normal error
Yes
Is the voltage between pin P2-16 of plug 2 and terminal TB-DC1-34 of the power supply board 1/25 of line voltage? See Appendix B Figure B-5.
No
Is the voltage between pin P2-17 of plug 2 and terminals TB-DC1-34 of the power supply board 1/25 of line voltage? See Appendix B Figure B-5.
No
No
Replace the power supply board.
No
Replace the power supply board.
Yes
Calibrate the controller’s normal source voltage.
4-4 Controller Troubleshooting
TP-5672 11/95
Page 32
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
This section covers the condition in which the normal source is available but the Source-Available, Normal LED is not on.
The first item to check is the trip-point settings. The trip-pointsettingscan be foundinIndex 6 inthe program menu. See Figure 4-4 for recommended trip-point settings.Thetrip-pointsdonotneedtoexactlymatchthe recommended trip-point settings for proper operation. However, if the trip-point settings in Index 6 are too high ortoo low,problemscouldoccur. Ifthe trip-pointsettings are too high or too low, correct them. Then enter normal source voltage and normal source frequency, and store the set points.
Next check Index 1 in the program menu for correct normal source voltage and frequency reading. If the voltage and frequency values in Index 1 match the voltage and frequency values in Index 6, perform the following steps.
1. Check if the phase sequence option is installed. If thereisa jumperacrossJP1-5,thephasesequence option is installed.
2. If the phase sequence option is installed, press the MENU arrow down key to check the phase sequence in Index 1. Utility power must be phased ABC.
3. If the normal source is single-phase,verify inMenu Index 6 that single-phase sensing was selected. A single-phase source must be sensed as a single-phase source.
Trip Point Setting Limits
Overvoltage
Dropout
Overvoltage
Pickup
Undervoltage
Pickup
Undervoltage
Dropout
Overfrequency
Dropout
Overfrequency
Pickup
Underfrequency
Pickup
Underfrequency
Dropout
105% -- 135% 115%
100% -- 130% 110%
75% -- 100% 90%
70% -- 95% 85%
105% -- 135% 115%
100% -- 130% 110%
85% -- 100% 90%
80% -- 95% 85%
Normal Source
Factory Setting
Figure 4-4. Normal source voltage trip point
setting limits and factory settings
4. If the source is available, the phase sequencing is correct, the sensing is correct, and the Source-Available, NormalLED is still not on, check the P2 ribbon cable connector.
a. Remove all power sources. b. Wait for 30 seconds.
c. Makingsurenot to bendor breakanyofthepins,
remove the P2 ribbon cable connector.
d. Inspect the pins on the P2 ribbon cable
connector.
e. If any of the pins are bent, carefully bend them
back. If any of the pins are broken, the ribbon cableconnectorisdefective.Replacetheribbon cable connector.
f. Carefully, reconnect P2 ribboncable connector.
5. If the Source-Available, Normal LED is still not illuminated, the status panel is defective. Replace the logic board assembly. If a value in Index 1 is incorrect, see steps below.
TP-5672 11/95
Controller Troubleshooting
4-5
Page 33
Incorrect Normal Source Voltage And Frequency Values
See Appendix B, Figure B-9 for location of TB-AC1 and other power supply boardcomponents referredto inthis section.
1. If the system is single-phase, use a voltmeter to measure the normal source voltage by connecting onetest leadto TB-AC1-NA and theother test lead to TB-AC1-NC. Note the voltmeter reading.
2. If the system is three-phase, use a voltmeter to measure the normal source voltage by connecting onetest leadto TB-AC1-NA and theother test lead to TB-AC1-NB. Note the voltmeter reading. Connectone test leadto TB-AC1-NBand the other test lead to TB-AC1-NC. Note the voltmeter reading.
3. If the voltmeter did not display the normal source voltageinstep 1 or step 2, checkthe normalsource and the contactor-to-assembly harness, P1.
4. If the voltage reading(s) in step 1 or step 2 did not match the value(s) displayed in Index 1, check the powersupplyboardbyperformingthefollowingfour steps.
NOTE
When taking a voltage or resistance measurement at a ribbon cable pin, do not disconnect the ribbon cable from the board. Use a needle point probe to take the readings from the holes on the top side of the ribbon cable connector.
a. Check the TestLED onthe powersupplyboard.
IftheTestLEDisnoton,installa jumperbetween TB-DC1-24 and TB-DC1-34. If the Test LED comesonwhenthejumperisinstalled,checkthe Automatic/Test pushbutton and the connected accessories.
b. Using a voltmeter, connect one test lead to
P2-15andtheothertestleadto TB-DC1-34.See Appendix B, FigureB-9 for locationof P2ribbon cable connector. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5 for values. Turn the generator off. See Appendix B, Figure B-9 for location of P2 ribbon cable pins.
c. Connect one test lead to P2-16 and the other to
TB-DC1-34. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
d. If the system is three-phase, connect one test
lead to P2-17 and the other to TB-DC1-34. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
e. If the system is three-phase, connect one test
lead to P2-18 and the other to TB-DC1-34. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
f. Removepowerfrom thelogicboard.Disconnect
the P2 ribbon cable connector. Recheck the P2 pointsonthepowersupplyboardinsteps4a,4b, 4c, and 4d. If the voltage readings are now correct, either an accessory or the logic board main logic board is bad.
5. If any of the voltage readings in step four were incorrect, replace the power supply board. If all of the voltage readings in step four were correct, calibrate the normal source voltage.
Calibrate Logic Board Normal
Three-Phase Source Voltage
1. Press the Automatic/Test pushbutton to start the generatorand to transfer the loadto the generator.
2. Disconnect the incoming normal power to the transfer switch by removing the line fuses, the in-line disconnect plug, or the incoming circuit breaker.
3. Verify that the normalsource voltage is zero. Using a voltmeter connect one test lead to TB-AC1-NA and one test lead to TB-AC1-NC. The voltmeter shouldread 0 volts AC. Connect one voltmetertest lead to TB-AC1-NA and the other test lead to TB-AC1-NB.The voltmetershouldread0 voltsAC. Connectonevoltmeter test leadto TB-AC1-NBand the other test lead to TB-AC1-NC. The voltmeter should read 0 volts AC.
4. If the normal source is three-phase, it can be sensed as either single-phase or three-phase depending on what the application requires. In Menu Index 6 choose the appropriate sensing method: single-phase sensing or three-phase sensing.
NOTE
When calibrating either the normal source or emergency source, never auto-zero the source unless it is zero volts. If source voltage is present and the YES key is pressed and entered at the AUTO-ZERO message, the logicboard will always read the system voltage as zero volts.
5. Using the menu in Index 12, arrow down to N-AUTO-ZERO? and press the YES key and the ENTER key.
6. Observe the ENTRY ACCEPTED message on the LCD.
4-6 Controller Troubleshooting
TP-5672 11/95
Page 34
7. When the message on the LCD again reads, N-AUTO-ZERO?,restorethenormalpowersource.
10. Press the RESET MENU key and then the ENTER key to store the set points.
8. If single-phase sensing is used, perform this step. PresstheMENUArrowDownkey so the LCDreads N-VOLT VAC. If the value displayed on the LCD after N-VOLT VAC is not between60% and 80% of the system voltage, replace the logic board assembly. If the value is between 60% and 80% of the system voltage, measure the normal system voltagebyconnectingone test leadofa voltmeterto TB-AC1-NAand theother test lead toTB-AC1-NC. Enter the measured value at the LCD message N-VOLT VAC. Press the ENTER key and observe the ENTRY ACCEPTED message on the LCD.
9. If three-phase sensing is used, perform this step. PresstheMENUArrowDownkey so the LCDreads N-PHA-C VAC. If the values displayedon theLCD after N-PH A-C VAC, N-PH A-B VAC,or N-PH B-C VAC are not between 60% and 80% of the system voltage, replace the logic board assembly. If the values are between 60% and 80% of the system voltage, measure and enter the normal system voltage by performing the next three steps.
a. Connect one test lead of a voltmeter to
TB-AC1-NA. Connect the other test lead to TB-AC1-NB. Enter the measured value at the LCD message N-PH A-B VAC. Press the ENTER key. Observe the ENTRY ACCEPTED message on the LCD. Press the MENU arrow down key.
b. Connect one test lead to TB-AC1-NB, and
connecttheothertestleadtoTB-AC1-NC.Enter the measuredvalue at the LCD message N-PH B-C VAC. Press the ENTER key. Observe the ENTRY ACCEPTED message on the LCD. Press the MENU arrow down key.
NOTE
If the system will not calibrate, replace the logic board assembly.
Calibrate Logic Board Normal
Single-Phase Source
NOTE
When calibrating either the normal source or emergency source, never auto-zero the source unless it is zero volts. If source voltage is present and the YES key is pressed and entered at the AUTO-ZERO message, the logicboard will always read the system voltage as zero volts.
1. Using the menu in Index 12, arrow down to N-AUTO-ZERO?. Press the YES key and the ENTER key.
2. Observe the ENTRY ACCEPTED message on the LCD.
3. When the message on the LCD again reads, N-AUTO-ZERO?,restorethenormalpowersource.
4. Press the MENUArrowDownkeysotheLCDreads N-VOLT VAC. If the value displayed on the LCD after N-VOLT VAC is not between60% and 80% of the system voltage, replace the logic board assembly. If the value is between 60% and 80% of the system voltage, measure the normal system voltagebyconnectingone test leadofa voltmeterto TB-AC1-NAand theother test lead toTB-AC1-NC. Enter the measured value at the LCD message N-VOLT VAC. Press the ENTER key and observe the ENTRY ACCEPTED message on the LCD.
c. Connect one test lead to TB-AC1-NA, and
connecttheothertestleadtoTB-AC1-NC.Enter the measuredvalue at the LCD message N-PH A-C VAC. Press the ENTER key. Observe the ENTRY ACCEPTED message on the LCD. Press the MENU arrow down key.
TP-5672 11/95
5. Press the RESET MENU key and then the ENTER key to store the set points.
NOTE
If the system will not calibrate, replace the logic board assembly.
Controller Troubleshooting
4-7
Page 35
Is the phase sequence option installed?
No
Is the phase sequence in index 2 A-B-C?
No
Rewire the source for a phase sequence of A-B-C in Index 2.
If the emergency source is available, but the source available emergency LED is not illuminated, check the trip point settings in index 7. Are the settings correct?
Yes
Does the microprocessor display, in index 2, rated emergency source voltages and frequency?
Is single-phase sensing used?
Yes
Are the pickup and
Yes
dropout settings correct in index 7?
Yes
No Replace the logic board.
Correct the trip point settings in index 7.
No
Correct the setpoints in Index 7.
NoYes
Measure the voltage between terminals TB-AC1-EB and
No
TB-AC1-EC of the power supply board; note results.
Yes
Yes
Does the voltage between terminals TB-AC1-EA and TB-AC1-EC of the power supply board equal the rated emergency voltage for the transfer switch?
Yes
Check the emergency source voltage and the wiring harness from the contactor to power supply board for open or shorted leads.
No
Is the voltage between pin P2-20 of plug 2 and terminal TB-DC1-34 of the power supply board 1/25 of rated line voltage? See Appendix B Figure B-5.
No
Yes
Replace the power supply board.
Calibrate the emergency source voltage.
Figure 4-5. Troubleshooting—Source-available, emergency error
Is the voltage between pin
Yes No
P2-19 of plug 2 and terminal TB-DC1-34 of the power supply board 1/25 of rated line voltage? See Appendix B Figure B-5.
Is the voltage between pin P2-21 of Is 3-phase sensing used.
No
Yes
plug 2 and terminals TB-DC1-34 of
the power supply board 1/25 of rated
line voltage? See Appendix B Figure
B-5.
Replace the power supply board.
Calibrate the emergency source voltage.
Replace the power supply board.
No
Yes
4-8 Controller Troubleshooting
TP-5672 11/95
Page 36
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
Thissectioncoverstheconditioninwhichtheemergency sourceisavailablebuttheSource-Available,Emergency LED is not on.
The first item to check is the trip-point settings. The trip-pointsettingscan be foundinIndex 7 inthe program menu. The recommended trip-point settings are in Figure 4-6. If the trip pointsin Index7 aretoo highor too low, changethem. Enter emergencysource voltageand emergency source frequency. Store the set points.
Emergency
Trip Point Setting Limits
Overvoltage
Dropout
Overvoltage
Pickup
Undervoltage
Pickup
Undervoltage
Dropout
Overfrequency
Dropout
Overfrequency
Pickup
Underfrequency
Pickup
Underfrequency
Dropout
105% -- 135% 115%
100% -- 130% 110%
75% -- 100% 90%
70% -- 95% 85%
105% -- 135% 115%
100% -- 130% 110%
85% -- 100% 90%
80% -- 95% 85%
Source Factory
Setting
Next check Index 2 of the program menu for correct emergencysourcevoltageand frequencyreading. If the valuesinIndex2arecorrect, performthefollowingsteps.
1. Check if the phase sequence option DD-05-K is installed. If accessory DD-05-K is installed and thereisa jumperacrossJP1-5,thephasesequence option is installed.
2. If the phase sequence option is installed, press the MENU arrow down key to check the phase sequencein Index 1. Emergency power must be phased ABC.
3. Check Menu Index 7 to verify proper sensing. A single phase source should use single phase sensing. If the source is three-phase and three phase sensing is desired, the three-phasesensing option, DD-05-K, must be installed. If this option is not installed, single-phase sensing must be used.
If the source is available, the values in Index 2 are correct, the phase sequence is correct, and the phase sensingis correct,but the Source-Available,Emergency LED is still not on, the status panel is bad. Replace the logic board assembly.
If a valueinIndex2 is incorrect, performthesteps below.
Figure 4-6. Emergency source voltage trip point
Setting Limits And Factory Settings
Incorrect Emergency Source Voltage
and Frequency Values
1. Use a voltmeter to measurethe emergencysource voltage by connecting one test lead to TB-AC1-EA and the other test lead to TB-AC1-EC. Note the voltmeter reading. See Appendix B Figure B-9 for location of TB-AC1 and other power supply board components referred to in this section.
2. If the system is three-phase and three phase sensing or phase rotation is desired, the option DD-05-K must be installed. If it is installed, use a voltmeter to measure the emergency source voltage by connecting one test lead to TB-AC1-EA and the other test lead to TB-AC1-EB. Note the voltmeter reading. Connect one test lead to TB-AC1-EB and the othertest lead to TB-AC1-EC. Note the voltmeter reading.
the emergency source and the contactor to assembly harness, P1.
4. If the voltage reading(s) in step 1 or step 2 did not match the value(s) displayed in Index 2, check the power supply board by performing the following steps.
NOTE
When taking a voltage or resistance measurement at a ribbon cable pin, do not disconnect the ribbon cable from the board. Use a needle point probe to take the readings from the holes on the top side of the ribbon cable connector.
See Appendix B Figure B-6 for location and description of P2 ribbon cable pins.
3. If the voltmeter did not display the expected emergencysourcevoltagein step1 orstep 2, check
TP-5672 11/95
a. Using a voltmeter, connect one test lead to
P2-19 and the other to TB-DC1-34. The
Controller Troubleshooting
4-9
Page 37
voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
b. If the system is three-phase and the
three-phase-sensingoptionisinstalled,connect one test lead to P2-20 and the other to TB-DC1-34. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
c. If the system is three-phase and the
three-phase-sensingoptionisinstalled,connect one test lead to P2-21 and the other to TB-DC1-34. The voltmeter should read approximately 1/25 of the line voltage. See Appendix B, Figure B-5.
d. RemovePowerfromthelogicboard.Disconnect
the P2 ribbon cable connector. Recheck the P2 pointsonthepowersupplyboardinsteps4a,4b, and4c.If thevoltagereadingstakeninsteps4a, 4b, and 4c are now correct, either an accessory or the main logic board is bad.
5. If any of the voltage readings in step 4 were incorrect, replace the power supply board. If all of the voltage readings in step 4 were correct, calibratethelogicboardemergencysourcevoltage by performing the steps below.
Calibrate The Logic Board
Emergency
Source Voltage
1. Three-phases sources can be sensed as either three-phase or single-phase. However, to have three-phase sensing the three-phase-sensing option DD-05-K must be installed. If the three-phase sensing option is installed and three-phasesensing is desired chooseemergency three-phase sensing in Menu Index 7.
2. If the emergency source is single-phase, or the optionDD-05isnotinstalled,theemergencysource canonlybe sensed as single-phase.In Menu Index 7 choose single-phase sensing.
NOTE
When calibrating either the normal source or emergency source, never auto-zero the source unless it is zero volts. If source voltage is present, and the YES key is pressed and entered at the AUTO-ZERO message, the logicboard will always read the system voltage as zero volts.
3. Read this step completely before performing it. Using the menu in Index 12 of the program menu, press the YES key when the E-AUTO-ZERO? message appears. Do not press the ENTER key afterwards.
4. Disconnect the emergency power source.
5. Press the ENTER key.
6. Observe the ENTRY ACCEPTED message on the LCD.
7. When the message on the LCD again reads, E-AUTO-ZERO?, reconnect the emergencypower source.
8. Press the MENU Arrow Down key.
Single-Phase Sensing
9. If single-phasesensingisused,performthis step. If the value displayed on the LCD after E-VOLT VAC isnotbetween60%and80% of thesystem voltage, replace the logic board assembly. If the value is between 60% and 80% of the system voltage, measure the emergency system voltage. Measure the emergency system voltage by connecting one test lead of a voltmeter toTB-AC1-EA. Connectthe other test leadto TB-AC1-EC. Enter the measured valueat the LCDmessageE-VOLTVAC. Press the ENTER key.
Three-Phase Sensing
10. If the emergency source is three phase and three-phase sensing is desired, the three-phase-sensing option DD-05-K must be installed. If the option is installed and three-phase sensing is used, perform this step. If the value displayed on the LCD after E-PH A-C VAC, E-PH A-B VAC, and E-PH B-C VAC is not between 60% and 80% of the system voltage, replace the logic board assembly. If the value is between 60% and 80% of the system voltage, measure the emergency system voltage by performing the following three steps.
a. Connect one test lead of a voltmeter to
TB-AC1-EA. Connect the other test lead to TB-AC1-EB. Enter the measured value at the LCD message E-PH A-B VAC. Press the ENTER key. Press the MENU arrow down key.
b. Connect one test lead to TB-AC1-EB, and
connecttheothertestleadtoTB-AC1-EC.Enter the measured value at the LCD message E-PH B-C VAC. Press the ENTER key. Press the MENU arrow down key.
c. Connect one test lead to TB-AC1-EA, and
connecttheothertestleadtoTB-AC1-EC.Enter the measured value at the LCD message E-PH A-C VAC. Press the ENTER key.
11. Press the RESET MENU key and then the ENTER key to store the setpoints.
NOTE
If the system will not calibrate, replace the logic board assembly.
4-10 Controller Troubleshooting
TP-5672 11/95
Page 38
System-Status, Not-In-Automatic
Error
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
NOTE
Pressing the Automatic/Test pushbutton will cause the generator set to start and run.
The System-Status, Not-In-Automatic LED should flash if the Automatic/Test pushbutton is pressed, if the Automatic/Inhibitkeyswitch is inthe Inhibitposition,orif theAutomatic-Transfer/Manual-Transferkey switchisin theManualposition.If oneoftheseconditionsistrue,but the System-Status, Not-In-Automatic LED is not flashing, perform the following steps.
a. Press the LAMP TEST key. If the
System-Status, Not-In-AutomaticLED doesnot turn on, the status panel is defective. Replace the logic board assembly.
description of P2 ribbon cable pins. See Figure 4-7 for the System-Status, Not-In-Automatic LED wiring diagram.
c. If the System-Status, Not-In-Automatic LED is
notflashing when P2-6 is grounded, remove the connectionfrom P2-6to TB-DC1-34, and check the P2 ribbon cable connection by performing the following steps.
d. Remove all power sources.
e. Wait for 30 seconds.
f. Makingsure not tobendorbreakanyofthepins,
remove the P2 ribbon cable connector.
g. Inspect the pins on the P2 ribbon cable
connector. Specifically check P2-6.
h. If any of the pins are bent, carefully bend them
back. If any of the pins are broken, the ribbon cableconnectorisdefective.Replacetheribbon cable connector.
i. Carefully reconnect P2 ribbon cable connector.
b. Connect TB-DC1-9 to TB-DC1-34. If the
System-Status, Not-In-Automatic LED is not flashing, connect P2-6 to TB-DC1-34. If the System-Status, Not-In-Automatic LED is now flashing, replace the power supply board. If the System-Status, Not-In-Automatic LED is not flashingwhenP2-6is grounded,perform step 4. SeeAppendixB,FigureB-9forlocationoftheP2 ribbon cable and other power supply board components referred to in this section. See Appendix B, Figure B-6 for location and
P2-6 P2-6
Main Logic Board
Figure 4-7. Wiring Diagram—System-status, not-in-automatic LED
12. If the System-Status, Not-In-Automatic LED is still not flashing, check the continuity of the P2 ribbon cable connector. Disconnect the P2 ribbon cable connector from both the power supply board and from the main logic board. Using an ohmmeter, placeone test leadon the powersupply board side of P2-6, and place the other test lead on the main logic board side of P2-6. If the resistance is high indicating a lack of continuity, replace the ribbon cable connector. If the resistance is low indicating continuity, replace the logic board assembly.
Power Supply Board
TB-DC1-9
560447
TP-5672 11/95
Controller Troubleshooting
4-11
Page 39
System-Status, System-Alert
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
If the System-Status, System-Alert LED is flashing, check the LCD for an error message. If the System-Status, System-Alert LED is flashing, but no error message appears on the LCD, the status panel is defective. Replace the logic board assembly.
The following sections will cover the different error messages encountered when the System-Status, System-Alert LED is flashing.
Contactor Position Fault Error
Messages
3. While the contactor is in the EMERGENCY position, connect one test lead of an ohmmeter to the contactor side of P1-16. Connect the other test lead to the contactor side of P1-8. Note the resistance.
4. If the resistance ineither case was high, thereis an open circuit. Verify correct wiring.
5. Check the auxiliary switches on the contactor.
The following steps check proper operation of the controller.
6. Connect the positive leadof a 12-24 volt DC power sourcetoTB-DC1-29.Connectthenegativeleadof the power source to TB-DC1-34. See Appendix B Figure B-9 for locationof TB-DC1 and other power supplyboardcomponentsreferredtointhissection.
The auxiliary-switch (AUX-SWITCH) fault error occurs when the position of the contactor does not match the positionthatthe logiccontroller last placedthecontactor in.Thedoubleauxiliary-switch(DBLAUX-SW)faulterror occurs when two contactor positions are detected simultaneously. If either of these error messages appears on the LCD, perform the following steps. See Figure 4-8.
P1-14
Closed in Normal
P1-10
Closed in Emergency
P1-13
560448
Figure 4-8. Wiring Diagram—Auxiliary-switch fault
and double auxiliary-switch fault
error message
Check the continuity of the contactor by performing the following three steps:
1. Disconnect the 24-pin plug to the logic controller assembly.
2. While the contactor is in the NORMAL position, connect one test lead of an ohmmeter to the contactorsideofP1-12.Connecttheothertest lead to the contactor side of P1-4. Note the resistance.
7. Connect P1-12 to P1-4. Press the RESET MENU key. If the Contactor-Position, Normal LED is not on,oriftheSystem-Status,System-AlertLEDisstill on, replace the power supply board.
8. Connect P1-16 to P1-8. Press the RESET MENU key. If the Contactor-Position, Emergency LED is noton,orif theSystem-Status,System-AlertLEDis still on, replace the power supply board.
Transfer Hang Error Message
A Transfer Hangerroroccurs whenthe controller issues a transfer command, but a transfer is not detected.
If TRANSFER HANG ERROR appears on the LCD, check for a binding contactor and check the contactor bridge rectifier. See the Contactor Service Manual.
Power-Down Error Message
APOWER-DOWN ERROR indicatestherewasa loss of AC power for a period of time. If the POWER-DOWN ERRORmessagedoesnotappearregularlyontheLCD, press the RESET MENU key, and set the time and the date.Press theRESET MENUkey andthen theENTER key to store the setpoints. If the POWER-DOWN ERROR message does appear regularly on the LCD, perform the following two steps.
1. If the ambient temperature is less than 20 degrees Fahrenheit, install a battery backup on the logic board.
4-12 Controller Troubleshooting
TP-5672 11/95
Page 40
WARNING
Sulfuric acid in batteries. Can cause severe injury or death.
Use protective goggles andclothes. Battery acidcan causepermanent damage toeyes, burnskin, andeat holes in clothing.
Sulfuric acid in batteriescan cause severe injury or death. Sulfuric acid in battery can cause permanent
damage to eyes, burn skin, and eat holes in clothing. Always wear splash-proof safety goggles whenworking around the battery. If battery electrolyte is splashed in the eyes or on skin, immediately flush the affected area for 15 minuteswithlargequantitiesof clean water. Seek immediatemedicalaidinthe case of eyecontact. Never addacidto abatteryonce the battery hasbeenplacedin service. This may result in hazardous spattering of electrolyte.
NOTE
When taking a voltage or resistance measurement at a ribbon cable pin, do not disconnect the ribbon cable from the board. Use a needle point probe to take the readings from the holes on the top side of the ribbon cable connector.
a. Check the voltage at P2-13. Using a voltmeter,
connectthe positive test leadto P2-13.Connect the negative test lead to TB-DC1-34. See Appendix B, Figure B-6 for location and description of P2 ribbon cable pins. Carefully
remove the power source by disconnecting the in-linedisconnect plug.Leave the power source disconnected for six seconds. After six seconds note the voltmeter reading.
b. If the voltage is less than six volts, replace the
power supply board.
c. Ifthevoltageis greaterthansixvolts,replacethe
logic board assembly.
RAM Or Memory Error Message
If either a RAM ERROR or a MEMORY ERROR message appear on the LCD, power down the logic boardforatleast30seconds.Replacepowerto thelogic board. If either the RAM ERROR or MEMORY ERROR messagestillappearonthe LCD,the main logic boardis defective. Replace the logic board assembly.
Manual Transfer Message
The MANUAL TRANSFER message will appear on the LCD when a transfer to the emergency source or to the normal source is desired but the logic board is in the manual mode. When this message appears press the appropriatepushbutton:ManualTransfer-to-Emergency or Manual Transfer-to-Normal. If automatic transfer is desired instead of manual transfer, place the automatic/manual transfer switch in the automatic position.
Manual-to-Off Transfer Message
TheMANUAL TO OFF messagewill appear on the LCD when three conditionsare met: 1) The transfer switch is in either the emergency or normal position, 2) the logic controlleris inmanual mode, and 3) the off positiontime delayisenabled. When this messageappearspressthe MANUAL-TO-OFF pushbutton.
TP-5672 11/95
Controller Troubleshooting
4-13
Page 41
TB-DC1-8
P2-7 P2-7
Fault LED
Power Supply Board
Figure 4-9. Wiring Diagram—Fault #1 or Fault #2 message
Fault #1 Or Fault #2 Message
The external fault function can be used to identify a problemwiththe emergencypowersystem, orasupport device of the emergency power system. A dry relay contactcanbeusedtosignala fault,suchasaTenRelay DryContact Kit, sold as anaccessorywith thegenerator set.
NOTE: The contact kit must be a dry contact, the logic controller supplies its own voltage source.
The fault messages are used to monitor accessory components. A faultmessageappearsontheLCDwhen an accessory is grounding the pin to which it is connected. See Figure 4-9.
1. If a FAULT#1 messageappearsonthe LCD, check TB-DC1-8.
a. If thereisan accessoryconnectedto TB-DC1-8,
disconnect the accessory. Press the RESET MENUkey.If themessagedisappears,thelogic board is performing correctly. The FAULT #1 messageiscausedbytheconnectedaccessory.
Main Logic Board
560449
b. If there is not an accessory connected to
TB-DC1-8, remove power from the logic board and disconnect the P2 ribbon cable connector from the power supply board. Using an ohmmeter, connectone test leadto P2-7 on the powersupplyboard.Connectthe other test lead to TB-DC1-34. If the resistance is low, replace thepowersupplyboard.If the resistance is high, replace the logic board assembly.
2. If a FAULT#2 messageappearsonthe LCD, check TB-DC1-11.
a. If there is an accessory connected to
TB-DC1-11, disconnect the accessory. If the message disappears, then the logic board is performing correctly.
b. If there is not an accessory connected to
TB-DC1-11, removepower from the logicboard and disconnect the P2 ribbon cable connector from the power supply board. Using an ohmmeter, connectone test leadto P2-8 on the powersupplyboard.Connectthe other test lead to TB-DC1-34. If the resistance is low, replace thepowersupplyboard.If the resistance is high, replace the logic board assembly.
4-14 Controller Troubleshooting
TP-5672 11/95
Page 42
Programming Mode Not-In-Off
For location of pushbuttons, switches, LEDs, and keys referred to in this section, see Figure 2-1.
The Programming Mode Not-In-Off LED signals the status of the Programming-Mode key switch. The three programming modes are Remote, Off, and Local.When theProgramming-Modekeyis setto Localprogramming mode,theProgrammingMode Not-In-Off LED shouldbe flashing. When the Programming-Mode key is set to
Programming Mode Switch “New” style switch—green plastic body
Position Contacts Closure Remote 1-8 Off 1-3 Local 3-5
Programming Mode Switch “Old” style switch—blue plastic body
Position Contacts Closure Remote 7-6 Off 7-1 Local 1-3
Remote programming mode, the Programming Mode Not-In-Off LED should be on steadily. When the Programming-Mode key is set to Off, the Programming Mode Not-In-Off LED should be off. See Figure 4-10. If any of these cases are not true, check the Programming-Mode key switch for proper wiring and operation. If the problem still exists, replace the logic board assembly.
Programming Mode Keyswitch (”New” style)
3
5
Programming Mode Keyswitch (”Old” style)
1
3
1
8
TB3
7
6
Local
C
Remote
TB3
Local
Figure 4-10. Wiring Diagram—Programming Mode Keyswitch
C
Remote
5604410
TP-5672 11/95
Controller Troubleshooting
4-15
Page 43
Engine Operates When it Should Not
If the engine continues to operate after the logic controller removes the start signal, check the power supply board Start LED and perform the following procedure.For locationof the StartLEDandotherpower supplyboardcomponents referred toin this section, see Figure 2-1.
1. If the Start LED is on, disconnect the engine from the contactor by removing wires number 3 and number 4 from the engine.
a. If theenginecontinuestorunwhenwires3and4
are disconnected from the engine, wait the period of time equal to the engine cooldown to ensure that the generator set is not just in the cooldown mode. If the engine continues to run, check the generator set and the generator set wiring.
b. If the engine stops running when wires 3 and 4
are disconnected from the engine, remove the P1 harness from the power supply board.
(1) If the engine continues to run when the P1
harness is disconnected, there is a contactor problem. See the Contactor Service Manual.
(2) If the engine stops running when the P1
harness is disconnected, reconnect the P1 wireharness.Checkthecontinuitybetween TB-DC1-22 and TB-DC1-21. Using an
ohmmeter, connect one test lead to TB-DC1-22. Connect the other test lead to TB-DC1-21. If the resistance is high indicating lack of continuity, replace the powersupply board. If the resistanceis low indicating continuity, disconnect any accessoriesconnected to TB-DC1-21 or to TB-DC1-22. If the engine stops running after the accessories are disconnected, checktheaccessoriesbyreferringto Unit3. If the engine continues to run after the accessories are disconnected, replace the power supply board.
2. If the Start LED is off, check the voltage at TB-DC1-23. Using a voltmeter, connect one test leadto TB-DC1-23, andconnect the other test lead to TB-DC1-34. If the voltmeter does not read approximately 19 volts AC, see Section 4—Power To The System. If the voltmeter does read approximately 19 volts AC, connect P4-1 to TB-DC1-34.
a. If the Start LED still does not light when P4-1 is
grounded, replace the power supply board.
b. If the Start LED lights when P4-1 is grounded,
check the Normal-Source-Available LED. If the Normal-Source-AvailableLEDis on, replacethe logic board assembly. If the Normal-Source­Available LED is not on, see Source-Available Normal Error.
4-16 Controller Troubleshooting
TP-5672 11/95
Page 44
Yes No
Is the start LED illuminated?
Disconnect the start terminals 3 and 4 on the power conversion unit. Does the generator set continue to run?
Yes
No
Check the generator set and generator set wiring.
Reconnect the start terminals 3 and 4 on the power conversion unit. Disconnect the 24 pin controller assembly plug, P24. Does the generator set continue to run?
Yes
Check the wiring harness from the transfer switch to the generator set for open or shorted leads.
Reconnect the 24 pin controller assembly plug, P24. Is there continuity between terminals TB-DC1-21 and TB-DC1-22 on the power supply board?
No
No
Is there 19 vac between terminals TB-DC1-23 and TB-DC1-34 of the power supply board?
No
Yes
See Power to the System troubleshooting chart.
Jumper pin P4-1 of plug 4 to terminal TB-DC1-34 of the power supply board. Does the start LED illuminate?
No
Replace the power supply board.
Is the normal source available LED illuminated?
Yes
No
Replace the logic board.
Yes
Yes
Replace the power supply board.
See Source Available Normal Error,troubleshooting chart.
Remove accessories that are connected to terminal TB-DC1-21 or TB-DC1-22 of the power supply board. Does the generator set continue to run?
Yes
Replace the power
No
supply board.
Check any accessories that are connected to terminals TB-DC1-21 or TB-DC1-22 of the power supply board for correct operation.
Figure 4-11. Troubleshooting—Engine operates when it should not.
TP-5672 11/95
Controller Troubleshooting
4-17
Page 45
Engine Will Not Start
If the engine will not operate, check the power supply boardSTARTLED and performthe followingprocedure. For location of the START LED and other power supply board components referred to in this section, see Appendix B, Figure B-10.
1. If the START LED is off, jumper engine start terminals 3 and 4 on the contactor assembly.
a. If the unit does not start when engine start
terminals 3 and 4 are jumpered, check the generator set and the generator set wiring.
b. If theunitstarts whentheenginestartterminals3
and4 arejumpered,removethejumperbetween engine start terminals 3 and 4. Jumper TB-DC1-21 and TB-DC1-22.
(1) If the engine starts when TB-DC1-21 and
TB-DC1-22 are jumpered, replace the power supply board.
(2) If the engine does not start when
TB-DC1-21 and TB-DC1-22 are jumpered,
check if there is a jumper between TB-DC1-22andTB-DC1-31.Ifthereisnota jumper, add one. If the enginestill doesnot start when TB-DC1-21 and TB-DC1-22 are jumpered, replace the powersupply board.
NOTE
When taking a voltage or resistance measurement at a ribbon cable pin, do not disconnect the ribbon cable from the board. Use a needle point probe to take the readings from the holes on the top side of the ribbon cable connector.
2. If the START LED is on, usinga voltmeter, connect thepositivetest leadto P4-1. Connect thenegative test lead to TB-DC1-34.
a. If the voltmeterreading is low (about 1 volt), the
status panel is defective. Replace the logic board assembly.
b. If the voltmeter reading is high (about 10 volts),
replace the power supply board.
4-18 Controller Troubleshooting
TP-5672 11/95
Page 46
Is the start LED illuminated?
NoYes
Is there 1 vdc between pin P4-1 of plug 4 and terminal TB-DC1-34 of the power supply board?
Yes
Replace the logic board.
Replace the power supply board.
No
Replace the power supply board.
Is there an accessory wired between terminals TB-DC1-22 and TB-DC1-31 of the power supply board
Yes
Yes
No
Jumper terminals 3 and 4 on the power conversion unit. Does the generator set start?
No
Check the generator set and the generator set wiring.
Remove the jumper between terminals 3 and 4. Jumper terminals TB-DC1-21 and TB-DC1-22 of the power supply board. Does the generator set start?
No
Is there a jumper between terminals TB-DC1-22 and TB-DC1-31 of the power supply board?
No
Jumper terminal TB-DC1-22 to terminal TB-DC1-31 of the power supply board together. Does the generator set start?
Yes
No
Yes
Check that the accessory is wired correctly. See Section 5 Accessories
Is there continuity between terminal TB-DC1-21 of the power supply board and pin P24-11 of plug P1?
Yes
Is there continuity between terminal TB-DC1-21 of the power supply board and pin P24-15 of plug P1?
No
Replace the power supply board.
Figure 4-12. Troubleshooting—Engine will not start.
No
Yes
Yes
Add a jumper between terminal TB-DC1-22 to terminal TB-DC1-31 of the power supply board.
Replace the power supply board.
Check the power conversion unit wiring for open or shorted leads.
TP-5672 11/95
Controller Troubleshooting
4-19
Page 47
Area Protection
Area Protection turns on the emergency source whena loss of normal power is expected because of an approaching storm or for some other reason. Area Protection allows the user to transfer to the emergency source.
If the Area-Protection LED is on and area protection is not active, perform the following steps.
1. Connect TB-DC1-6 to TB-DC1-34.
Is there a lead from TB-DC1-6 to TB-DC1-32, 33, or 34?
Replace logic board.
Is the Area Protection LED on?
Yes Yes
Check Engine Start Circuit.
No
No
2. If the Area-Protection LED does not turn off after groundingTB-DC1-6,connectP2-5toground.Ifthe Area-Protection LED does not turn off, replace the powersupplyboard.If theArea-ProtectionLEDstill doesnot turn off,replace the logicboardassembly.
3. If the Area-Protection LED does turn off after grounding TB-DC1-6, check the wiringfor an open circuit to TB-DC1-6 and the connection at TB-DC1-6.
Yes
No
Remove lead.
No
Is the Area Protection LED on?
Check Engine Start Circuit.
Install a lead from TB-DC1-6 to TB-DC1-32.
Figure 4-13. Troubleshooting—Area protection does not turn on
No
Is there a lead from TB-DC1-6 to TB-DC1-32, 33, or 34?
Replace logic board.
No
Yes
Is the Area Protection LED on?
Check Engine Start Circuit.
Figure 4-14. Troubleshooting—Area protection does not turn off
Yes
4-20 Controller Troubleshooting
TP-5672 11/95
Page 48
Shunt Jumper-Controlled Options
Jumpersinstalledinthe shunt-jumpersocket JP1 on the main logic board control the following options.
D Extended Time Delays—DD-100-B D Plant Exerciser—DD-23-C, DD-23-D, and
DD-23-G
D Voltage/Frequency Sensing—DD-34-J D Phase Sequencer—DD-34-Z and DD-05-K D In-phase Monitor—DD-34-A D Off Delays
See Appendix B Figure B-9 to locate JP1. See Figure 4-15 to locate option shunt jumper locations on JP1. Programming Index 11 displays installed control options status as enabled or disabled. Figure 4-16 describes the options in Index 11.
To add/remove shunt-jumper controlled options:
1. Add/remove shunt-jumpers across the terminals nextto the name of the option on JP1 and shownin Figure 4-15. Do not remove the MANUAL OVERRIDE jumper.
3. Power down the controller by disconnecting the inline disconnect plug P1.
4. Waitaminimumof1 minutethenreconnectplugP1 to power up the controller.
5. Check Index 11. YES should appearonly after the Index 11 listing of all options with installed shunt jumpers.
To troubleshoot shunt jumper-controlled options see Figure 4-17 or Figure 4-18.
NOTE
When the optionsare not locked the controller does not checkJP1uponpoweruptodetermineoptionstatus,but rather reads the setpoints stored before power was interrupted.
Main Logic Board
2. Go to Index 20 and press Menu Down and look for OPTIONS LOCK? NO. If the question does not appear, the options are locked. Go to step 3. Otherwise, lock the options:
a. Answer the question with YES then ENTER.
The controller briefly displays ENTRY ACCEPTED.
MANUAL
TIME
PLANT
VOLT/
PHASE
OFF
OVRIDE DELAY EXER FREQ SEQUENCER MONITORIN-PHASE
DELAYS
b. Press RESET MENU and then ENTER to store
the setpoints. The controller briefly displays STORE SET--POINTS. The optionswillremain locked when the controller powers back up the next time.
Control Option Description
INPHASE MON Shows Inphase Monitor enabled (Yes) or disabled (No). PHA SEQ/LOSS Shows Source-Phase-Sequence enabled (YES) or disabled (NO). (Transfer Switch contactor lug
connections must be properly phased ABC in order for the source to be acceptable).
NORM & EMER Shows sensing enabled (YES) or disabled (NO) of overvoltage, undervoltage, overfrequency,
underfrequency for both the normal source and the emergency source. PLANT EXER Shows generator set/system exerciser enabled (YES) or disabled (NO). TD EXTENDED Shows extended time delay enabled (YES) or disabled (NO). MAN OVERRIDE Shows manual override enabled (YES) or disabled (NO). Enabled manual override (YES) allows
automatic transfer to an available source when connected source fails. Transfer time delays will
be bypassed. Disabled manual override (NO) causes the logic board to wait for manual operation.
The logic board will not automatically seek available source. OFF DELAYS Shows time delay off to normal and off to emergency are enabled (YES) or disabled (NO).
Figure 4-15. Shunt-jumper socket JP1
560451
TP-5672 11/95
Figure 4-16. The installed control options as they appear on the LCD
Controller Troubleshooting
4-21
Page 49
Yes
Options are not locked. Lock the options to change: Answer YES and ENTER to OPTIONS LOCK? NO in Index 20, then press RESET MENU then ENTER to store the setpoints before repeating powerdown/powerup sequence.
Does an entry appear in Index 20 that says OPTIONS LOCK? NO ?
No
No
Options are locked. Does OFF DELAYS not have a jumper and displays YES ?
Interrupt controller power supply by disconnecting the inline disconnect plug P1. Wait at least one minute. Reconnect P1. Does YES appear only after Index 11 listed options with jumpers on JP1?
No
Yes
Troubleshooting complete.Replace logic board.
No
Check Index 20. Is the switch type M GERIN MC ?
The OFF DELAYS are required and cannot be changed to NO.
Yes
Yes
Figure 4-17. Troubleshooting—YES appears in Index 11 when a jumper for that option is not installed
Yes
Options are not locked. Lock the options to change: Answer YES and ENTER to OPTIONS LOCK? NO in Index 20, then press RESET MENU then ENTER to store the setpoints before repeating powerdown/powerup sequence.
Does an entry appear in Index 20 that says OPTIONS LOCK? NO ?
Options are locked. Does OFF DELAYS have a jumper and displays NO ?
No
No
Yes
Check Index 20. Is the switch type ZENITH STD ?
Interrupt controller power supply by disconnecting the inline disconnect plug P1. Wait at least one minute. Reconnect P1. Does YES appear only after Index 11 listed options with jumpers on JP1?
No
Troubleshooting complete.
Remove the jumpers of the options that appears as NO in Index 11 and test for continuity. Is any jumper open?
No
Replace logic board. Replace open jumper.
Yes
Yes
Does INPHASE MONITOR
No
have a jumper and displays NO ?
Yes
Check Index 20. Is the switch type
Yes
ZENITH STD ?
No
IN-PHASE MONITOR not available on switches with an Off position
No
TD OFF not available on switches without an Off position
Yes
Figure 4-18. Troubleshooting—NO appears in Index 11 when a jumper for that option is installed
4-22 Controller Troubleshooting
TP-5672 11/95
Page 50
Inphase Monitor
Motors and related equipment can be damaged by abnormal inrush currents when switched between two livepowersources. ThepurposeoftheInphaseMonitor, DD-34-A, is to minimize abnormal inrush currents to equipment when the equipment is connected to a new power source. The Inphase Monitor samples a single phaseofonesourceandcomparesit toasinglephaseof another source. When the two voltages are within the desiredphase angle and approachingzero phaseangle difference, the Inphase Monitor signals the transfer switch to operate. The transfer may be from utility to generator, from generator to generator, or from utility to
NA NB NC EA EB EC LA
MANUAL
TIME PLANT VOLT/
PHASE
IN--PHASE
OFF
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR
DELAYS
Programming Shunt (294634) must be installed to activate accessory
LB
LC NAS NCS EAS ECS
utility. To enable this option, the IN-PHASE MONITOR jumper must be installed on the main logic board. See Figure 4-15.
NOTE
Thegeneratorsetshouldrun 0.5 Hzfasterthantheutility source. InphaseMonitor canbeenabledonlyontransfer switches with power conversion units without an Off position like ZENITH STD.
Figure 4-19shows a wiring diagram for this option. See Figure 4-20 for troubleshooting this option.
MICROCONTROLLER
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
560458
Figure 4-19. Wiring Diagram—Inphase monitor, option DD-34-A
Is the In-phase Monitor jumper installed in JP1 on the logic board?
If a connected source fails partially (not all voltages on all phases below the undervoltage dropout setpoints) or after normal source restoration when connected to emergency, the ATS starts an automatic transfer sequence to the other source.
Does the In-phase Monitor LED light
1. After TDNE ends and before transfer to emergency or
2. After TDEN ends and before transfer to normal?
No
Replace logic board.
Figure 4-20. Troubleshooting—Inphase monitor, does not work
Yes
In Index 11 is Inphase
Yes
Monitor enabled?
Does the ATS transfer
Yes
to the other source in a few seconds and in phase?
Yes
In-phase monitor is working.
Rewire the phase rotation of the emergency source to match the normal source, or both to A-B-C when practical.
Replace logic board.
No
No
Install the In-phase Monitor jumper on JP1 and power down the controller for 1 minute mininum.
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
No
Are the normal and emergency sources within 0.5 Hz?
Yes
Adjust the generator frequency 0.5 Hz faster than the normal source.
Do the emergency
No
and normal power sources have the
Yes
same phase rotation?
No
TP-5672 11/95
Controller Troubleshooting
4-23
Page 51
Source Monitors
The Source Monitor Phase Sequencer accessory DD-34-Zprovidessourcemonitoringforboth thenormal and emergency sources. The features include phase rotation and anti-single phasing protection. This option must be used in conjunction with DD-05-K in order to provide three-phase source monitoring on the emergencyside. Thisaccessoryneedstobeenabledby installing the PHASE SEQUENCER jumper on the main logic board. See Figure 4-15. A wiring diagram for this option is in Figure 4-21.
The Voltage/Frequency Sensing accessory, DD-34-J, provides source monitoring for both the normal and emergency sources. This accessory senses an overvoltage condition for all normal source phases, an over/underfrequency condition on one normal source phase,and anoverfrequencyand overvoltagecondition
NA NB NC EA EB EC LA LB
MANUAL
TIME
PLANT
VOLT/
PHASE
IN--PHASE
OFF
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR DELAYS
LC
NAS NCS EAS ECS
on one emergency source phase. This accessory is enabled by installing the VOLT/FREQ jumper on the main logic board. See Figure 4-15. See Appendix B, Figure B-4 for the emergency source voltage trip point setting limits and factory settings. A wiring diagram for this accessory is in Figure 4-22.
The three-phase emergency source sensing accessory DD-05-K provides source monitoring for the emergency source. The features includeoverfrequency sensing for one phase of the emergency source and over/undervoltage sensing for all three phases of the emergencysource. Thisaccessoryneedstobeenabled by installing the PHASE SEQUENCER jumper on the mainlogic board. See Figure 4-15. Figure 5-3 showsa wiring diagram for this option.
MICROCONTROLLER
TB--DC1TB--AC1
18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34
1 2 3
4
5 6 7 8 9
10
11 12 13 14 15 16
17
Programming shunt (294634) must be installed to activate accessory
Figure 4-21. Wiring Diagram—Source monitor phase sequence, option DD-34-Z
4-24 Controller Troubleshooting
560455
TP-5672 11/95
Page 52
MANUAL
TIME
PLANT
VOLT/
PHASE
IN--PHASE
OFF DELAYS
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR
NA NB NC EA EB EC LA LB LC
NAS NCS EAS ECS
MICROCONTROLLER
TB--DC1TB--AC1
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
1 2 3
4
5 6 7 8 9
10
11 12 13 14 15 16
17
Programming shunt (294634)
must be installed to activate accessory
Figure 4-22. Wiring Diagram—Voltage/Frequency Sensing, option DD-34-J
Yes
Is option DD-05-K installed?
No
Yes
Is the Phase Sequencer jumper installed in JP1 on the logic board?
Yes
In Index 11 is Phase Sequencing enabled?
Yes
Does the controller sense only normal source three phase voltage and frequency?
Refer to Accessory DD-05-K Troubleshooting
No
No
No
560456
Install the Phase Sequencer jumper on JP1 and power down the controller for 1 minute mininum.
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
In Index 1 and 2 are there readings for normal source three phase sensing?
No
Yes
Replace logic board.
Option is working.
Accessory DD-05-K is needed to monitor the emergency source three-phase voltage and frequency.
Figure 4-23. Troubleshooting—Source monitor phase sequencer does not work
TP-5672 11/95
Controller Troubleshooting
4-25
Page 53
Is the Volt/Freq jumper installed in JP1 on the logic board?
Yes
In Index 11 is Norm & Emer sensing enabled?
Yes
No
No
Install the Volt/Freq jumper on JP1 and power down the controller for 1 minute mininum.
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Is emergency source voltage available at the power conversion unit?
No
No power source is available.
No
Yes
Is the controller sensing the normal source only?
Yes
Is there normal source voltage available at the power conversion unit?
Yes
Is Index 1 displaying a voltage reading for the normal source?
Yes
Are the pickup and dropout set points correct in Index 6?
Yes
Replace logic board.
No
No
No
No power is available.
Refer to Section 4— Power To The System Troubleshooting.
Reset set points.
Is Index 2 displaying a voltage reading for the emergency source?
No
Refer to Power To The System Troubleshooting.
Yes
Are the pickup and dropout set points correct
No
Reset set points.
in Index 7?
Yes
Replace logic board.
Figure 4-24. Troubleshooting—Voltage and frequency sensing does not work
4-26 Controller Troubleshooting
TP-5672 11/95
Page 54
Plant Exerciser
The Plant Exerciser is an accessory which periodically tests the emergency source for proper operation. To enable this option, the PLANT EXER jumper must be installed on the logic board. See Figure 4-15. The accessory is available in three different variations.
D DD-23-C. Allows test of the engine generator set
only. The generatorset will start and run under no load.
D DD-23-D. Allowsacompletetest of theemergency
source. The exerciser simulates a loss of normal power. The generator set starts and the transfer switch transfers the load to the generator set.
D DD-23-G. Allows the customer to choose between
DD-23-C and DD-23-D with a Load/No Load selector switch.
Option DD-23-C(no-load exerciser)and DD-23-D (load exerciser) are wired differently. In order to enable DD-23-D,TB-DC1-10 must be jumperedto TB-DC1-32. See Figure 3-1 or 3-2.
The plant exerciser is programmed in Index 8. The following information is needed to program the plant exerciser.
D Start time D Day of the week D Run time in hours and minutes D Week of the month (Calendar Mode Only)
Entertheinformationandenabletheeventto operatethe plant exerciser.
If theplantexerciserisprogrammedandfunctioning,the Accessory Active, Plant Exerciser LED lights whenever the plant exerciser is operating.
The Plant Exerciser uses three different modes.
D 7 Day. The timer looks at only 7 days at one time D 14 Day. The timer looks at 14 days at a time D Calendar. The timer looks at a true calendar for
each month.
SeeFigure 4-27throughFigure 4-30fortroubleshooting flowcharts for these options.
TB--AC1
NA NB NC EA EB EC
LA
LB
LC NAS NCS EAS ECS
DD-23-C DD-23-D
MICROCONTROLLER
TB--DC1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25 26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
MANUAL
TIME PLANT VOLT/
PHASE
IN--PHASE
OFF
9
1
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR DELAYS
TB--AC1
NA NB NC EA EB EC
LA
LB
LC NAS NCS EAS ECS
Programming shunt (294634) must be installed
MICROCONTROLLER
TB--DC1
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Jumper
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16
17
TP-5672 11/95
Figure 4-25. Wiring Diagram—Plant exerciser, option DD-23-C and DD-23-D
Controller Troubleshooting
560452
4-27
Page 55
EXERCISOR SELECT
S11
1 — 2
MANUAL
TIME PLANT VOLT/
PHASE
IN--PHASE
OFF
W/LOAD
NO LOAD
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR DELAYS
Programming shunt (294634)
must be installed to activate accessory
TB--AC1
NA NB NC EA EB EC LA LB
LC NAS NCS EAS
ECS
MICROCONTROLLER
TB--DC1
18 19 20
21 22 23 24
25
26
27
28 29 30 31 32 33 34
1 2 3 4
5 6
7
8
9
10
11 12 13 14 15 16
17
110
1
S11
2
Figure 4-26. Wiring Diagram—Plant exerciser, option DD-23-G
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Place a jumper across terminals 21 and 31 on TB-DC1 of the power supply board. Does the generator set start?
Yes
Do pins 11 and 15 on plug P2 short when the plant exerciser is active?
Yes
Replace logic board.
Replace the ribbon cable between plugs P2 and P3
In Index 11 is Plant
No
Exerciser enabled?
No
Is the Plant Exer jumper
Yes
installed in JP1 on the logic
No
board?
Yes
Do pins 11 and 15 on plug
Yes No
P3 short when the plant exerciser is active?
No
Place a jumper across start terminals 3 and 4 on the power conversion unit. Does the generator set start?
No
Yes
Check the engine start circuit for an open circuit.
Replace the wiring harness between TB-DC1 and the power conversion unit.
132
Install the Plant Exer jumper on JP1 and power down the controller for 1 minute mininum.
Is the plant exerciser programmed correctly in index 8? See TP-5664 for programming information.
Yes
Replace logic board.
Reprogram the plant exerciser. Refer to TP-5664 for programming instructions.
560453
No
Figure 4-27. Troubleshooting—Accessory 23-C, plant exerciser, does not work
4-28 Controller Troubleshooting
TP-5672 11/95
Page 56
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Yes
In Index 11 is Plant
No
Exerciser enabled?
Is the Plant Exer jumper installed in JP1 on the logic board?
Yes
Is there a jumper from terminals TB-DC1-10 to TB-DC1-32 on the power supply board?
Yes
No
Install the Plant Exer jumper on JP1 and power down the controller for 1 minute mininum.
No
Install jumper lead between terminals TB-DC1-10 and TB-DC1-32 of the power supply board.
Place a jumper across terminals 21 and 31 on TB-DC1 of the power supply board. Does the generator set start?
Yes
Do pins 11 and 15 on plug P2 short when the plant exerciser is active?
Yes
Replace the logic board.
Replace the ribbon cable between plugs P2 and P3.
Figure 4-28. Troubleshooting—Accessory 23-D, plant exerciser does not work
No
Yes
Do pins 11 and 15 on plug P3 short when the plant exerciser is active?
No
Place a jumper across the start terminals 3 and 4 on the power conversion unit. Does the generator set start?
No
Yes
Check engine start circuit for an open circuit.
Replace the wiring harness between TB-DC1 and the power conversion unit.
No
Is the plant exerciser programmed correctly in index 8? See TP-5664 for programming information.
Yes
Replace the logic board.
Reprogram the plant exerciser. Refer to TP-5664 for programming instructions.
No
TP-5672 11/95
Controller Troubleshooting
4-29
Page 57
Install the Plant Exer jumper on JP1 and power down the controller for 1 minute mininum.
Is the Plant Exer jumper
No
installed in JP1 on the logic board?
Yes
Yes
In Index 11 is Plant Exerciser enabled?
Troubleshoot
No
shunt-jumper controlled options. See Figure 4-18.
Is the Load/No Load selector switch in the NO LOAD position?
Check for continuity between terminals TB-DC1-10 and TB-DC1-32 of the power supply
Yes
board. Is there continuity?
Is there continuity across the Load/No Load selector switch when it is in the NO LOAD position?
No
Remove the leads from terminals TB-DC1-10 and TB-DC1-32 of the power supply board. Is there continuity from terminals TB-DC1-10 to TB-DC1-32 of the power supply board?
No
Replace the leads from terminals TB-DC1-10 and TB-DC1-32 of the power supply board.
No
Yes
Yes
Replace the Load/No Load selector switch.
Yes
Replace the logic board.
Place a jumper across terminals 21 and 31 on TB-DC1 of the power supply board. Does the generator set start?
Yes
Place the Load/No Load selector switch into the NO LOAD position.
No
Do pins 11 and 15 on plug P3 short when the plant exerciser is active?
Yes
No
No
Is the plant exerciser programmed correctly in index 8? See TP-5664 for programming information.
Yes
No
Replace the logic board.
Reprogram the plant exerciser. Refer to TP-5664 for programming instructions.
Do pins 11 and 15 on plug P2 short when the plant exerciser is active?
start terminals 3 and 4 on the power conversion unit. Does the generator set start?
Yes
Yes
Place a jumper across the
No
Replace the logic board.
Check the engine start
No
circuit for an open circuit.
Replace the ribbon cable between plugs P2 and P3.
Replace the wiring harness between TB-DC1 and the power conversion unit.
Figure 4-29. Troubleshooting—Accessory 23-G, plant exerciser, does not work (unloaded exercise)
4-30 Controller Troubleshooting
TP-5672 11/95
Page 58
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Yes
In Index 11 is the Plant
No
Exerciser enabled?
Is the Plant Exer jumper installed in JP1 on the logic board?
Yes
No
Install the Plant Exer jumper on JP1 and power down the controller for 1 minute mininum.
Place the Load/No Load selector switch into the LOAD position.
Replace the Load/No Load selector switch.
Place a jumper across terminals 21 and 31 on TB-DC1 of the power supply board. Does the
Yes
generator set start?
Do pins 11 and 15 on plug P2 short when the plant exerciser is active?
Yes
Is the Load/No Load
No
selector switch in the LOAD position?
Yes
Yes
Is there continuity across the Load/No Load selector switch ?
Do pins 11 and 15 on plug P3 short when the
Yes
plant exerciser is active?
Place a jumper across the start terminals 3 and 4 on the power conversion unit. Does the generator set start?
No
No
No
Yes
TB-DC1-10 to the Load/No Load selector switch. Is there continuity?
No
Replace the lead from TB-DC1-10 to the Load/No Load selector switch.
Check for continuity from terminal TB-DC1-32 of the
Check for continuity from
No
power supply board to the Load/No Load selector switch. Is there continuity?
No
Replace the lead from terminal TB-DC1-32 of the power supply board to the Load/No Load selector switch .
No
Is the plant exerciser programmed correctly in index 8? See TP-5664 for programming information.
Yes
Replace the logic board.
No
Replace the logic board.
No
Yes
Check the engine start circuit for an open circuit.
Reprogram the plant exerciser. Refer to TP-5664 for programming instructions.
Replace the ribbon cable between plugs P2 and P3.
Replace the wiring harness between terminal TB-DC1 of the power supply board and the power conversion unit.
Figure 4-30. Troubleshooting—Accessory 23-G, plant exerciser, does not work (loaded exercise)
TP-5672 11/95
Controller Troubleshooting
4-31
Page 59
Time Delays
D DD-100-B. This accessoryallowsalltime delaysto
be adjusted from 0 to 99 minutes.
TimeDelayaccessoryDD-100-Bincreasesallofthetime delays up to 99 minutes. The time delays are used for transfer from normal to emergency, transfer from emergency to normal, engine start, engine cooldown, and load-shed sequence. The TIME DELAY jumper
Is the Time Delay jumper installed in JP1 socket on the logic board?
In Index 11 are TD Extended enabled?
In Index 5 can TDES, TDEN,
Replace logic board.
No
TDOE, TDON and TDEC be adjusted to 99 minutes?
must be installedon themainlogicboardto increasethe adjustable range of standard time delays up to 99 minutes. See Figure 4-15. To extend TDES time delays an external 12-32 vdc power supply is required. See Figure 4-15. Timedelays are adjustable from either the front panel keypad or from a remote computer. See Figure 4-31 for a troubleshooting chart for this option.
No
Yes
No
Yes
Yes
Install the Time Delay jumper for on JP1 and power down the controller for 1 minute mininum.
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Connect an external DC power supply between TB-DC1-29 and TD-DC1-32?
Figure 4-31. Troubleshooting—Extended time delays do not work
Is there an external DC power
No
supply connected between TB-DC1-29 and TD-DC1-32?
Yes
Option is working.
4-32 Controller Troubleshooting
TP-5672 11/95
Page 60
Manual Override
It isimportantthat theMANUALOVRIDE jumperalways beinplaceonthemainlogicboard. SeeFigure 4-15. Do not remove it!
Is the Manual Ovride jumper installed in JP1 socket on the logic board?
Yes
In Index 11is Manual Override enabled?
Yes
Replace logic board.
Yes
Is the auto/manual switch in the auto position?
No
Place the auto/manual switch in the auto position.
See Figure 4-32 for a troubleshooting flowchart for this option.
No
No
Install the Manual Ovride jumper on JP1 and power down the controller for 1 minute mininum.
Troubleshoot shunt-jumper controlled options. See Figure 4-18.
Figure 4-32. Troubleshooting—Switch does not automatically transfer
TP-5672 11/95
Controller Troubleshooting
4-33
Page 61
Off Delays
The Off position time delay allows an off position power conversionunit to stop for a definedperiodof time in the offposition. A uniquetimedelaycanbe programmedfor an off-to-normal transfer and an off-to-emergency transfer. Thisoff delay can beused toallow motor loads to come to rest before being reenergized. The OFF DELAYS jumper must be installed on the logic board. See Figure 4-15. Off delays cannot be enabled on a switch type that does not have an Off position like ZENITH STD andthejumperhasnoeffect. On allpower
conversionunits with anOff position except the MM and MN,theoffdelayscanbeset to zero. On theMM andMN power conversion units the minimum off delay is one second.
If the Off Delays jumper is not installed, install the Off Delay jumper on JP1 and power downthe controller for 1 minute minimum.
If the jumperis installed, checkIndex 11to see if the Off Delaysoptionisenabled. If notenabled,seeFigure 4-18 to troubleshoot shunt-jumper controlled options.
4-34 Controller Troubleshooting
TP-5672 11/95
Page 62
Section 5. Accessory Troubleshooting
This section contains a brief description, wiring diagrams, and troubleshooting flowcharts for many of the logic board accessories.
Refer to Appendix C for a comprehensive list of
Options with
DD- Prefix
23-C Plant Exerciser X X 34-A Inphase Monitor X X 34-J Voltage Sensing X X 34-Z Phase Rotation X X 100-B Extended Time Delays X X X X
05-K Emergency Source Sensing X X X 06-F Two Position Test Switch X X X X 06-N Three Position Test Switch X X X X 06-P Three Position Test Switch X X X X 07-D Four Position Test Switch X X X X 08-C E-to-N Time Delay Override Switch X 08-D N-to-E Time Delay Override Switch X 23-D Plant Exerciser X X X X 23-G Plant Exerciser X X X X 24-XX-A,B Battery Charger X 29-P Manual Transfer--Both Directions X X 29-R Manual Transfer--Both Directions, Key X X 29-S Manual Transfer--E-to-N X 29-T Manual Transfer--E-to-N, Key X 29-U Manual Transfer--Both Directions with
Auto/Manual switch
29-V Manual Transfer--Both Directions with
Auto/Manual Switch, Key
29-W Manual Transfer--E-to-N with
Auto/Manual Switch
29-X Manual Transfer--E-to-N with
Auto/Manual Switch, Key
35-N Load Shed X X
Option Description
Shunt Jumper-Controlled Options
Other Options
commonly used accessories. See Figure 5-1 for the relationship between the
microprocessormainfunctionsandtheaffectthatcertain accessories can have on those functions.
Transfer
Normal to
Emergency
X X
X X
Accessory Affects
Transfer
Emergency
to Normal
X
X
Engine Start
Engine
Shutdown
TP-5672 11/95
Figure 5-1. Accessory Troubleshooting Grid
Accessory Troubleshooting
5-1
Page 63
Optional Accessories
Three-Phase Emergency Source Sensing Accessory, DD-05-K
The three-phase emergency source sensing accessory DD-05-K provides source monitoring for the emergency source. The accessory includes over/undervoltage
No
Enable three-phase sensing in index 7. See TP-5664 for programming information
Is there emergency source line-to-line voltage between terminals EA and EB, EA and EC, and EB and EC on the three-phase sensing accessory circuit board? See Figure 5-3 for location of circuit board)
No
Replace the three-phase accessory circuit board.
In Index 7 of the microprocessor menu is three-phase emergency source sensing enabled?
Yes
In Index 11 of the microprocessor menu is phase sequence enabled?
Yes
Yes
Remove the ribbon cable between plug P15 on the three-phase accessory circuit board and P14 on the power supply board. Is there 1/25 of the emergency source line-to-line voltage between pins 6 and 7 of plug P15?
Yes
Is there 1/25 of the emergency source line-to-line voltage between pins 6 and 8 of plug P15?
sensing for all three phases of the emergency source. Refer to Figure 5-2 for the troubleshooting flowchart.
No
Refer to shunt-jumpered control options troubleshooting.
No
Is there emergency source line-to-line voltage between EA and EB, EA and EC, and EB and EC at terminals EA, EB, and EC on TB-AC1?
Yes
No
No
Replace the leads from TB-AC1 to the three-phase accessory circuit board.
The emergency source is not available.
Replace the three-phase accessory circuit board.
Yes
Refer to Power Supply to Main Logic Board troubleshooting.
Figure 5-2. Troubleshooting—Controller will not sense three-phase emergency voltage
5-2 Accessory Troubleshooting
Yes
Check the ribbon cable for bent or broken pins and for continuity between connectors. Is the ribbon cable free of defects?
No
Replace the ribbon cable between P15 on the three-phase accessory circuit board and P14 on the power supply board.
TP-5672 11/95
Page 64
NA
y
NB NC EA EB EC LA LB
BLUE STRIPE TO
SLOTTED SIDE
LC
OF DIPSOCKET
NAS NCS EAS ECS
MICROCONTROLLER
RIBBON CABLE
294638
PCBASSY C--294493
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
LOT NO.
LOT NO.
34
MANUAL
TIME PLANT VOLT/
PHASE
IN--PHASE
OFF
OVRIDE DELAY EXER FREQ SEQUENCER MONITOR DELAYS
Programming Shunt (294634)
must be installed to activate accessor
Figure 5-3. Wiring Diagram—Three-phase emergency source sensing, Option DD-05-K
560457
TP-5672 11/95
Accessory Troubleshooting
5-3
Page 65
Test Switches
RefertoFigure 5-4for wiringdiagramfortheTestswitch. Refer to Figure 5-5 through Figure 5-10 for the troubleshooting flowcharts.
Description Of The Automatic/Test
Switch Accessories
The two-position test switch is described below:
D DD-06-F. Momentary, key-operated Automatic/
Test switch simulates a normal source failure.
The system operates automatically with switch in the automaticposition. The test position simulates a normal source failure.
The three-position test switches are described below:
D DD-06-N. Momentary Test/Automatic/Engine-
Start switch
D DD-06-P. Momentary, key-operated Test/
Automatic/Engine-Start switch
The system operates automatically with switch in the automaticposition. The test position simulates a normal source failure. The engine-start position starts the generator set.
The four-position test switch is described below:
D DD-07-D. Maintained rotary style
Test/Automatic/Off/Engine-Start switch.
The system operates automatically with switch in the automaticposition. The test position simulates a normal source failure. The off position prevents transfer switch operation. Theengine-startpositionstarts the generator set.
NOTE
When taking a voltage or resistance measurement at a ribboncablepin,do not disconnect the ribbon cablefrom theboard. Use aneedlepointprobeto take the readings from the holes on the top side of the ribbon cable connector.
2. If the power supply board Test LED turns on when the Automatic/Test pushbutton is pressed, check the Not-In-Automatic LED. If the Not-In-Automatic LED does not turn on when the Automatic/Test pushbutton is pressed, connect TB-DC1-9 to TB-DC1-34.
a. If the Not-In-Automatic LED does not turn on
when TB-DC1-9 is grounded, check the P2 ribbon cable connection by performing the following steps.
(1) Disconnect TB-DC1-9 from TB-DC1-34. (2) Remove all power sources. (3) Wait for 30 seconds. (4) Makingsure not to bend or break any of the
pins,removetheP2ribboncableconnector.
(5) Inspect the pins on the P2 ribbon cable
connector.
(6) If any of the pins are bent, carefully bend
themback.If anyofthe pinsare broken, the ribbon cable connector is defective. Replace the ribbon cable.
(7) Carefully reconnect P2 ribbon cable
connector.
Troubleshooting The Automatic/Test
Switch Accessory
NOTE
Pressing the Automatic/Test pushbutton causes the generator set to start and run.
Press the Automatic/Test pushbutton for 15 seconds.
1. If the power supply board Test LED does not illuminate,connectTB-DC1-24toTB-DC1-34.Ifthe Test LEDilluminateswhenTB-DC1-24isgrounded, checktheAutomatic/Testpushbuttonandthewiring from the Automatic/Test pushbutton to the power supply board. If the Test LED does not illuminate when TB-DC1-24 is grounded, replace the power supply board.
5-4 Accessory Troubleshooting
(8) If the Not-In-Automatic LED still does not
turn on when TB-DC1-9 is grounded, replace the logic board assembly.
b. If the Not-In-Automatic LED turns on when
TB-DC1-9 is grounded but not when the Automatic/Test pushbutton is pressed, check the Automatic/Test pushbutton and the wiring from the Automatic/Test pushbutton to the power supply board.
3. If the power supply board Test LED and the Not-In-Automatic LED both turn on when the Automatic/Test pushbutton is pressed, but the engine does not start, check the power supply board Start LED. If the Start LED is not on, see Section 4, Engine Will Not Start. If the Start LED does come on, replace the power supply board.
TP-5672 11/95
Page 66
NA NB NC EA EB EC LA LB
LC NAS NCS EAS ECS
MICROCONTROLLER
S1--6
S1--3
S1--2 134
121S1--5 122
124
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
Wire Number
S1--1109
TBDC1--9
TBDC1--34 134
TBDC1--21
TBDC1--22
109
121
122
S1
1--2 3--4 5--6
S1
5 61 2
TEST SWITCH
ENG.
START
43
124 TBDC1--24
TESTAUTO
5604516
Figure 5-4. Wiring Diagram—Test switches, Options DD-06-N, -P, -R, -T
No
Refer to the engine start troubleshooting flowchart.
No
Replace the lead from terminal TB-DC1-21 on the power supply board to the test switch.
Place a jumper between terminals TB-DC1-21 and TB-DC1-31 on the power supply board. Does the generator set start?
Yes
Place a jumper between terminals TB-DC1-21 and TB-DC1-22 on the power supply board. Does the generator set start?
Yes
Is there continuity between terminal TB-DC1-21 and terminal 5 of the test switch?
Yes
Is there continuity between terminal TB-DC1-22 and terminal 6 of the test switch?
Yes
No
Replace the test switch.
No
Is there a jumper between terminals TB-DC1-22 and TB-DC1-31 on the power supply board?
Yes
Replace the jumper between terminals TB-DC1-22 and TB-DC1-31 on the power supply board.
Install a jumper between terminals TB-DC1-22 and TB-DC1-31 on the power supply board.
No
Replace the lead from terminal TB-DC1-22 on the power supply board to the test switch.
Figure 5-5. Troubleshooting—Test switches, Options DD-06-N, -P switch does not start the generator set
when switch is in the engine start position
TP-5672 11/95
Accessory Troubleshooting
5-5
Page 67
Does the generator set start when the test switch is in the TEST position?
Yes
No
No
Option is functioning properly.
No
Replace the logic board.
No
Replace the lead from terminal TB-DC1-34 on the power supply board to the test switch.
Does the Not-In-Automatic LED illuminate when the test button is pressed?
Yes
Place a jumper between terminals TB-DC1-9 and TB-DC1-34 on the power supply board. Does the Not-In-Automatic LED illuminate?
Is there continuity between terminal TB-DC1-34 on the power supply board and terminal 4 of the test switch?
Yes
Is there continuity from terminal 2 to terminal 4 of the test switch?
Yes
Replace the test switch.
Yes
Place a jumper between terminals TB-DC1-21 and TB-DC1-31 on the power supply board. Does the
Yes
generator set start?
Replace the logic board.
No
No
Is there continuity between
Yes
terminal TB--DC1--9 on the power supply board and terminal 1 of the test switch?
Yes
Replace the lead from terminal TB-DC1-9 on the power supply board to the test switch.
Replace the jumper between terminals 2 and 4 of the test switch.
Is there continuity between terminals TB-DC1-24 and TB-DC1-34 of the power supply board when the test button is pressed?
No
Is there continuity between terminal TB-DC1-24 on the power supply board and terminal 3 of the test switch?
No
Refer to the engine start troubleshooting flowchart.
Is there continuity between terminal TB-DC1-34 on the power supply board and terminal 4 of the test switch?
Yes
Replace the lead from terminal TB-DC1-34 on the power supply board to the test switch.
Yes
No
Replace the test switch.
No
Replace the lead from terminal TB-DC1-24 on the power supply board to the test switch.
Figure 5-6. Troubleshooting—Test switches, Options DD-06-N, -P switch does not start the generator
setwhen the test switch is in the Test position
5-6 Accessory Troubleshooting
TP-5672 11/95
Page 68
No
Place a jumper between terminals TB-DC1-21 and TB-DC1-31 of the power supply board. Does the generator set start?
Refer to the Engine Start Troubleshooting Flowchart.
No
Replace the lead from terminal TB-DC1-21 on the power supply board to the test switch.
No
Replace the lead from terminal TB-DC1-22 on the power supply board to the test switch.
No
Yes
Place a jumper between terminals TB-DC1-21 to TB-DC1-22 of the power supply board. Does the generator set start when the test switch is in the Engine Start position?
Yes
Is there continuity between terminal TB-DC1-21 on the power supply board and terminal 7 of the test switch?
Yes
Is there continuity between terminal TB-DC1-22 on the power supply board and terminal 9 of the test switch?
Yes
Is there continuity between terminal TB-DC1-31 on the power supply board and terminal 10 of the test switch?
No
Is there a jumper between terminal 8 and terminal 9 of the test switch?
Yes
Replace the jumper between terminal 8 and terminal 9 of the test switch.
Install a jumper between terminal 8 and terminal 9 of the test switch.
No
Replace the lead from terminal
Yes TB-DC1-31 on the power supply board to the test switch.
Replace the test switch.
Figure 5-7. Troubleshooting—Test switches, Option DD-07-D switch does not start the generator set when
in the engine start position
TP-5672 11/95
Accessory Troubleshooting
5-7
Page 69
Does the generator set start when the test switch is in the Test position?
No
Is there continuity between terminals TB-DC1-24 and TB-DC1-34 on the power supply board when the test button is pressed?
Place a jumper between terminals TB-DC1-21 to TB-DC1-31 on the power supply board. Does the generator set start?
Yes
Yes
Refer to the engine start troubleshooting flowchart.
Refer to Figure 5-7 troubleshooting flowchart
Is there 10 vdc at terminal TB-DC1-30 on the power supply board?
Yes
Is there 10 vdc at terminal TB-DC1-25 on the power
No
supply board when the test switch is in the test position?
No
Yes
No
Yes
No
Is there continuity between terminal TB-DC1-24 on the power supply board and terminal 3 of the test switch?
Yes
Is there continuity between terminal TB-DC1-34 on the power supply board and terminal 4 of the test switch?
Yes
No
Replace the lead from terminal TB-DC1-34 on the power supply board to the test switch.
Replace the lead from terminal TB-DC1-24 on the power supply board to the test switch.
Replace the power supply board.
Does the Not-In-Automatic LED illuminate when the test switch is in the test position?
No
Yes
Replace the test switch.
Is there continuity between terminal TB-DC1-9 on the power supply board and terminal 1 of the test switch?
Replace the lead from terminal TB-DC1-9 on the power supply board to the test switch.
Is there continuity between terminal TB-DC1-34 on the
No
power supply board and terminal 4 of the test switch?
Replace the lead from terminal TB-DC1-34 on the power supply board to the test switch.
Yes
YesNo
Yes
No
Place a jumper between terminals TB-DC1-9 and TB-DC1-34 on the power supply board. Does the Not-In-Automatic LED illuminate?
No
Replace the logic board.
Is there continuity between terminal 2 to terminal 4 of the test switch?
No
Replace the jumper between terminal 2 to terminal 4 of the
Option is functioning properly
Yes
Replace the test switch.
test switch.
Figure 5-8. Troubleshooting—Test switches, Option DD-07-D switch does go into Test mode
5-8 Accessory Troubleshooting
TP-5672 11/95
Page 70
Is there continuity between terminals TB-DC1-24 and TB-DC1-34 on the power supply board?
No
Yes
Replace the test switch.
Is there continuity between terminals TB-DC1-25 and TB-DC1-30 on the power supply board?
No
Is there continuity between terminals TB-DC1-21 and TB-DC1-22 on the power supply board?
No
Is there continuity between terminals TB-DC1-22 and TB-DC1-31 on the power supply board?
No
Replace the logic board.
Yes
Yes
Yes
Replace the test switch.
Replace the test switch.
Replace the test switch.
Figure 5-9. Troubleshooting—Transfer switch operates when Option DD-07-D test switch is in the Off
position
Is there 10 vdc at terminal TB-DC1-30 on the power supply board?
Yes
No
Replace the power supply board.
Is there 10 vdc at terminal TB-DC1-25 on the power supply board when the test switch is in the AUTO position?
Yes
Is there continuity between terminals TB-DC1-22 and TB-DC1-31 on the power supply board?
No
Is there continuity between terminal TB-DC1-22 on the power supply board and terminal 9 on the test switch?
Yes
Is there continuity between terminals TB-DC1-31 on the power supply board and terminal 10 on the test switch?
Yes
Replace the test switch
Yes
No
No
No
Refer to controller troubleshooting in section 4
Replace the lead from terminal TB-DC1-22 on the power supply board to the test switch
Replace the lead from terminal TB-DC1-31 on the power supply board to the test switch
Replace the test switch
Figure 5-10. Troubleshooting—Transfer switch will not operate when Option DD-07-D test switch is in the
Auto position
TP-5672 11/95
Accessory Troubleshooting
5-9
Page 71
Time Delay Override Accessory
The Time Delay Override Accessory allows the user to manually override the emergency-to-normal or normal-to-emergency time delay. When the pushbutton is pressed the corresponding transfer occurs immediately. The two different Time Delay Override accessories are listed below.
D DD-08-C. Emergency to normal time delay
override pushbutton
D DD-08-D. Normal to emergency time delay
override pushbutton
Wiring diagrams for these two accessories are in Figure 5-11 and Figure 5-12. Refer to Figure 5-13 and Figure 5-14 for troubleshooting flowcharts.
Troubleshooting The Bypass
Normal-To-Emergency Time Delay
Pushbutton
This section covers the steps to take to verify that the Bypass Normal-to-Emergency Time Delay pushbutton will override the normal-to-emergency time delay.
NOTE
make sure that the emergency source is available. Initiate a normal-to-emergency time delay by removing the normal source, and then press the Bypass Normal-to- Emergency Time Delay pushbutton.
If afterpressing the Bypass Normal-to-EmergencyTime Delaypushbuttonthenormal-to-emergencytimedelayis not bypassed, connect TB-DC1-3 to TB-DC1-34.
1. If grounding TB-DC1-3 causes the normal-to­emergency time delay to be bypassed but the Bypass Normal-to-Emergency Time Delay pushbutton is not operating, check the Bypass Normal-to-Emergency TimeDelay pushbutton and the wiring to the Bypass Normal-to-Emergency Time Delay pushbutton.
2. If after grounding TB-DC1-3 the normal-to­emergency time delay is not bypassed, check the continuity between P2-3 and TB-DC1-3.
a. Remove power from the logic board. b. Disconnect the P2 ribbon cable connector from
the power supply board.
Pressing the Bypass Normal-to-Emergency Time Delay pushbutton causes the generator set to start and run.
First ensure through the software that a minumum 5-second normal-to-emergency time delay is set. Next,
MICROCONTROLLER
NA NB NC EA EB EC
LA
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
Wire Number
LB
LC NAS NCS EAS ECS
S2--3 133
c. Using an ohmmeter, connect one test lead to
P2-3 on the power supply board. Connect the other test lead to TB-DC1-3. If there is an open circuit, replace the power supply board. If the resistance is low, the main logic board is bad. Replace the logic board assembly.
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
104
S2--4
TBDC1--33
TBDC1--4 104
133
S2
NO
43
5604519
Figure 5-11. Wiring Diagram—Time Delay Override, Option DD-08-C
5-10 Accessory Troubleshooting
TP-5672 11/95
Page 72
MICROCONTROLLER
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
Wire Number
TB--AC1
NA NB NC
EA
EB
EC LA LB
LC NAS NCS EAS ECS
Figure 5-12. Wiring Diagram—Time Delay Override, Option DD-08-D
Troubleshooting The Bypass
Emergency-To-Normal Time Delay
Pushbutton
This section covers the steps to take to verify that pressingthe BypassEmergency-To-Normal Time Delay pushbutton will override the emergency-to-normal time delay.
First ensure through the software that a 10 second emergency-to-normal time delay is set. While the emergency source is being used, initiate an emergency-to-normaltimedelaybyrestoringthenormal source. Then press the Bypass Emergency-to-Normal Time Delay pushbutton.
If afterpressing the Bypass Emergency-to-NormalTime Delaypushbuttontheemergency-to-normaltimedelayis not bypassed, connect TB-DC1-4 to TB-DC1-34.
S3--3 133
TB--DC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
S3--4103
TBDC1--3
133TBDC1--33
103
NO
S3
43
5604520
1. If grounding TB-DC1-4 causes the emergency-to­normal time delay to be bypassed but the Bypass Emergency-to-Normal Time Delay pushbutton is not operating, check the Bypass Emergency­To-Normal TimeDelaypushbuttonandthewiringto the Bypass Emergency-To-Normal Time Delay pushbutton.
2. If after grounding TB-DC1-4 the emergency-to­normal time delay is not bypassed, check the continuity between P2-4 and TB-DC1-4.
a. Remove power from the logic board. b. Disconnect the P2 ribbon cable connector from
the power supply board.
c. Using an ohmmeter, connect one test lead to
P2-4 on the power supply board. Connect the other test lead to TB-DC1-4. If there is an open circuit, replace the power supply board. If the resistance is low, the main logic board is bad. Replace the logic board assembly.
TP-5672 11/95
Accessory Troubleshooting
5-11
Page 73
Is the emergency power source available?
Yes
No
Emergency source must be present to bypass the time delay normal-to-emergency.
Yes
Replace the ribbon cable between P2 on the power supply board and P3 on the logic board.
No
Replace the power supply board.
Is there a TDNE time delay set in Index 5 of the microprocessor program?
Yes
Place a jumper between terminals TB-DC1-3 and TB-DC1-33 on the power supply board. Does the switch transfer to the emergency source?
No
Disconnect the in-line plug to remove power from the logic board. Remove the ribbon cable between P2 on the power supply board and P3 on the logic board. Check the ribbon cable for any open or shorted leads. Are there any open or shorted leads?
No
Is there continuity between pin P2-3 on the ribbon cable and TB-DC1-3 on the power supply board?
Yes
Program a TDNE time
No
delay in index 5 of the microprocessor program.
Yes
Is there continuity between terminal TB-DC1-3 on the power supply board and terminal 3 on the bypass switch?
No
Replace the lead from terminal TB-DC1-3 on the power supply board to the bypass switch.
Is there continuity between terminal TB-DC1-33 on the power supply board and terminal 4 on the test switch?
Yes
Yes
No
Replace the logic board.
Replace the bypass switch.
Replace the lead from terminal TB-DC1-33 on the power supply board to the bypass switch.
Figure 5-13. Troubleshooting—Option DD-08-C, Normal-to-emergency time delay pushbutton does not
work
5-12 Accessory Troubleshooting
TP-5672 11/95
Page 74
Is the normal source available
Yes
No
Normal source must be present to bypass the time delay emergency-to-normal.
Yes
Replace the ribbon cable between P2 on the power supply board and P3 on the logic board.
No
Replace the power supply board.
Is there a TDEN time delay set in Index 5 of the microprocessor program?
Yes
Place a jumper between terminals TB-DC1-4 and TB-DC1-33 on the power supply board. Does the switch transfer to the normal source?
No
Disconnect the in-line plug to remove power from the logic board. Remove the ribbon cable between P2 on the power supply board and P3 on the logic board. Check the ribbon cable for any open or shorted leads. Are there any open or shorted leads?
No
Is there continuity between pin P2-4 on the ribbon cable and TB-DC1-4 on the power supply board?
Yes
Replace the logic board.
No
delay in index 5 of the microprocessor program.
Yes
Is there continuity between terminal TB-DC1-4 on the power supply board and terminal 3 on the bypass switch?
No
Replace the lead from terminal TB-DC1-4 on the power supply board to the bypass switch
Is there continuity between terminal TB-DC1-33 on the power supply board and terminal 4 on the test switch?
Yes
Program a TDEN time
No
Replace the bypass switch
Yes
Replace the lead from terminal TB-DC1-33 on the power supply board to the bypass switch.
Figure 5-14. Troubleshooting—Option DD-08-D, Emergency-to-normal time delay pushbutton does not
work
TP-5672 11/95
Accessory Troubleshooting
5-13
Page 75
Preferred Source Switch
Preferred source switch option DD-10-D provides a meansto select whichof two generatorsets will beused
TB--AC1
NA NB NC
EA
EB EC
LA LB
LC NAS NCS
EAS
ECS
MICROCONTROLLER
TB--DC1--23--123
DCK--K1--118
2FU--BK--123
DCK--2--132
PSS--4--134
2FU
SPLICE
BK R
TB--DC1
18 19 20 21 22 23 24 25 26
10
27 28
12
29
13
30
14
31
15
32
16
33
17
34
TB--DC1--18--118 TB--DC1--32--132
whentheemergencysourcefails. See Figure 5-15for a wiring diagram for DD-10-D.
PSS
4
503
1 2 3 4
5 6 7 8 9
11
PSS--3--106
K1 2 42A
DCK
K1
TB
To Gen. 1
Engine Start
NC
NO
3A 4A
C
502
504
1 2
501
5 6
NO
500
1--2 3--4 5--6
134--TBDC1--34
NCNC
3
106--TBDC1--6
GEN1 GEN2
PREFERRED
SOURCE
G2G1PSS
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
Emergency Source Available
Contacts Shown De-energized
Wire Number
To Gen. 2
Engine Start
3 4
Contactor
Figure 5-15. Wiring Diagram—Preferred source switch, Option DD-10-D
321383
5-14 Accessory Troubleshooting
TP-5672 11/95
Page 76
Relay Auxiliary Dry Contacts
Auxiliary Dry Contacts option DD-14-G provides ten contactsfor remote indication.The contactsare ratedat 10 amperes and125 volts AC. This accessory indicates normal and emergency contactor positions, normal and emergency source availability, control not in automatic,
NA NB NC EA EB EC LA LB LC NAS NCS EAS ECS
4FU
TBDC1--23--123
SPLICE
Wire Code Example
Device Name
S10--13—201
SPLICE
BK R
Wire Number
Device Terminal Number
142--DCK--42A
programmodenot in off,and system alert.DD-14-Gcan be fitted to a transfer switch alone or with up to two additional auxiliary dry contact accessories. Figure 5-16 contains a wiring diagram for DD-14-G.
K10 K9 K8 K7 K6 K5 K4 K3 K2 K1 2 42A
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
DCK
K10
K9
K8
K7
K6
K5
K4
K3
K2
K1
101--DCK--K9
114--DCK--K10
ATS not in auto
Program switch “not in off”
System alarm
System alarm
Emergency position
Normal position
Emergency available
Emergency available
Normal available
Normal available
MICROCONTROLLER
DCK--K3--118 DCK--K7--119
4FU--BK--123
DCK--K1--126 DCK--K6--127 DCK--K5--128
DCK--2--132
TBDC1--14--114
TBDC1--1--101
TBDC1--19--119 TBDC1--27--127 TBDC1--28--128
TBDC1--18--118 TBDC1--26--126
TBDC1--32--132
4FU--R--142
J
J J
TP-5672 11/95
Shown De-energized
Figure 5-16. Wiring Diagram—Option DD-14-G, Auxiliary Dry Contacts
Accessory Troubleshooting
5604521
5-15
Page 77
Additional auxiliary dry contact accessories are describedbelow. Wiring diagrams for these accessories are in Figure 5-17 to Figure 5-24. Refer to Figure 5-25 for the troubleshooting flowchart.
D DD-14-H. Single-contactkitfor remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicate the normal contactor position.
D DD-14-J. Single-contact kit for remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicate the emergency contactor position.
D DD-14-K. Single-contactkit forremoteindication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicatenormal source availability.
D DD-14-L. Single-contact kit for remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicate emergency source availability.
D DD-14-M. Single-contactkitforremoteindication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicate whether the Automatic/Manual selector switch is not in the Automatic position.
D DD-14-N. Single-contactkitfor remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicatewhether the programming mode switch is not in the Off position.
D DD-14-P. Single-contact kit for remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used to indicate a system alert condition.
D DD-14-R. Single-contactkitfor remote indication.
This option is rated for 10 amps and for 120 volts AC. It is used for load bank control. Relay energizes whenthe plant exersieris active andthe contractor does not transfer.
TB--AC1
NA NB NC
EA
EB EC
LA LB
LC NAS NCS
EAS
ECS
MICROCONTROLLER
2FU--BK--123
DCK--K1--128
DCK--2--132
Wire Code Example
Device Name
Wire Number
S10--13—201
Device Terminal Number
TB--DC1
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16
17
TB--DC1--23--123
TB--DC1--28--128 TB--DC1--32--132
2FU--R--306
SPLICE
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
Contacts Shown De-energized
5604522
Figure 5-17. Wiring Diagram—Option DD-14-H, Auxiliary dry contacts
5-16 Accessory Troubleshooting
TP-5672 11/95
Page 78
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
NA NB
NC EA EB EC LA LB
LC NAS NCS EAS ECS
MICROCONTROLLER
2FU--BK--123
DCK--K1--127
DCK--2--132
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
TB--DC1--23--123
TB--DC1--27--127 TB--DC1--32--132
2FU--R--306
Contacts Shown De-energized
Wire Number
Figure 5-18. Wiring Diagram—Option DD-14-J, Auxiliary dry contacts
SPLICE
2FU
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
RBK
5604523
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
NA NB NC
EA
EB EC
LA
LB
LC NAS NCS EAS ECS
MICROCONTROLLER
2FU--BK--123
DCK--K1--126
DCK--2--132
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
TB--DC1--23--123
TB--DC1--26--126 TB--DC1--32--132
2FU--R--306
Contacts Shown De-energized
Wire Number
Figure 5-19. Wiring Diagram—Option DD-14-K, Auxiliary dry contacts
SPLICE
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
5604524
TP-5672 11/95
Accessory Troubleshooting
5-17
Page 79
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--AC1
NA NB NC EA EB EC LA LB
LC NAS NCS EAS ECS
Wire Number
MICROCONTROLLER
DCK--K1--118
2FU--BK--123
DCK--2--132
TB--DC1
18
19
20
21 22 23 24 25 26 27 28
29 30
31 32 33 34
1 2 3 4 5 6 7 8 9
10
11 12 13 14 15 16
17
TB--DC1--23--123
TB--DC1--18--118 TB--DC1--32--132
2FU--R--306
SPLICE
Contacts Shown De-energized
Figure 5-20. Wiring Diagram—Option DD-14-L, Auxiliary dry contacts
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
5604525
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
TB--DC1--23--123
114--DCK--K1
TB--DC1--14--114 TB--DC1--32--132
SPLICE
2FU--R--306
NA NB NC EA EB EC
LA
LB
LC NAS NCS EAS ECS
MICROCONTROLLER
2FU--BK--123
DCK--2--132
Contacts Shown De-energized
Wire Number
Figure 5-21. Wiring Diagram—Option DD-14-M, Auxiliary dry contacts
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
5604526
5-18 Accessory Troubleshooting
TP-5672 11/95
Page 80
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--AC1
NA NB NC EA EB EC
LA
LB
LC NAS NCS EAS ECS
Wire Number
MICROCONTROLLER
2FU--BK--123
DCK--2--132
TB--DC1
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
1 2 3 4 5 6 7 8
9
10
11 12 13 14 15 16
17
101--DCK--K1
TB--DC1--23--123
TB--DC1--1--101
TB--DC1--32--132
2FU--R--306
SPLICE
Contacts Shown De-energized
Figure 5-22. Wiring Diagram—Option DD-14-N, Auxiliary dry contacts
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
5604527
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--AC1
NA NB NC EA EB EC LA LB
LC NAS NCS EAS ECS
MICROCONTROLLER
DCK--K1--119
2FU--BK--123
DCK--2--132
TB--DC1
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
1 2 3 4 5 6 7 8 9
10
11 12 13 14
15
16
17
TB--DC1--23--123
TB--DC1--19--119 TB--DC1--32--132
2FU--R--306
SPLICE
Contacts Shown De-energized
Wire Number
Figure 5-23. Wiring Diagram—Option DD-14-P, Auxiliary dry contacts
2FU
BK R
K1 2 42A
DCK
K1
306--DCK--42A
C NC NO
5604528
TP-5672 11/95
Accessory Troubleshooting
5-19
Page 81
Wire Code Example
Device Name
S10--13—201
Device Terminal Number
TB--DC1TB--AC1
1
18
2
19
3
20
4
21
5
22
6
23
7
24
8
25
9
26
10
27
11
28
12
29
13
30
14
31
15
32
16
33
17
34
105--DCK--K1
TB--DC1--23--123
TB--DC1--5--105
TB--DC1--32--132
2FU--R--306
Contacts Shown De-energized
NA NB NC EA EB EC
LA
LB
LC NAS NCS EAS ECS
Wire Number
MICROCONTROLLER
2FU--BK--123
DCK--2--132
Figure 5-24. Wiring Diagram—Option DD-14-R, Auxiliary dry contacts
SPLICE
K1 2 42A
2FU
RBK
DCK
K1
306--DCK--42A
C
NC
NO
5604529
5-20 Accessory Troubleshooting
TP-5672 11/95
Page 82
Yes
Is there 12 to 32 vdc between terminals 42A(+) and 2(--) on the relay board?
No
Is there continuity between terminal TB-DC1-32 on the power supply board and terminal 2 on the relay board?
No
Replace wire from terminal TB-DC1-32 on the power supply board to terminal 2 on the relay board.
Does the terminal become grounded at TB-DC1 when the event is active? Refer to Figure 1a for leads and functions of each contact.
Yes
No
Replace the leads to the relay board.
Replace the logic board.
Yes
Is the inline fuse between terminal 42A on the relay board and terminal TB-DC1-23 on the power supply board blown?
No
Replace fuse.
Replace the leads from terminal TB-DC1-23 on the power supply board to terminal 42A on the relay board.
Yes
Yes
Is there 12 to 32 vdc between terminals TB-DC1-23(+) and TB-DC1-32(--)on the power supply board?
No
Is there 19 vac between terminals TB-AC1-NAS and TB-AC1-NCS or TB-AC1-EAS to TB-AC1-ECS on the power supply board?
No
Replace power supply board.
Is there rated line-to-line voltage between terminals TB-AC1-NA and TB-AC1-NC or terminals TB-AC1-EA and TB-AC1-EC on the power supply board terminals?
Yes
Sources not available.
No
Yes
Replace the power supply board.
Figure 5-25. Troubleshooting—Option DD-14, Auxiliary dry contacts relay boards do not operate
Make sure that the function you are testing is available, i.e., ATS Not-In-Auto relay K10. For this relay to be
Terminal number for
ten-relay board
K1 K1 Normal Source Available TB-DC1-32 K2 K1 Normal Source Available TB-DC1-26 K3 K1 Emergency Source Available TB-DC1-18 K4 K1 Emergency Source Available TB-DC1-18 K5 K1 Contactor in the Normal position TB-DC1-28 K6 K1 Contactor in the Emergency position TB-DC1-27 K7 K1 System Alarm TB-DC1-19 K8 K1 System Alarm TB-DC1-19 K9 K1 Program switch not in the Off position TB-DC1-1
K10 K1 Test switch not in the Auto position TB-DC1-14
Terminal number for
single-relay boards
energized the Test switch must not be in the Auto position.
Description Terminal Number
Figure 5-26. Option DD-14 Terminal Description
TP-5672 11/95
Accessory Troubleshooting
5-21
Page 83
Main Shaft Auxiliary Dry Contacts
One main shaft auxiliary dry contact, option DD-15-A,is supplied standard on 600 volt class transfer switches. DD-15-Aismountedon thetransfer switch. The location of the auxiliarycontacts varies accordingto the ampere size and type of power conversion unit. One set of auxiliary contacts is closed when the transfer switch is connectedtothe normalsource.One set is closedwhen the transfer switch is connected to the emergency source. Refer to the power conversion unit service
manual for troubleshooting. Additional accessory DD-15 contacts available are
described below.
D DD-15-E. This accessory has one additional
contact which is closed when the transfer switch is connected to the normal source.
D DD-15-F. This accessory has one additional
contact which is closed when the transfer switch is connected to the emergency source.
5-22 Accessory Troubleshooting
TP-5672 11/95
Page 84
Meters
Option 18 providesan analog meter to measure various parameters including voltage, current, and frequency. Figure 5-27 contains a wiring diagram for option DD-18-G. Figure 5-33 contains a troubleshooting flowchart for option DD-18-G. Figure 1b through Figure 5-32contain wiring diagrams for option DD-18-J.
MICROCONTROLLERTB--AC1 TB--DC1
T4--W
T4--BK
204
206
Wire Code Example
S10--13—201
NA NB NC EA EB EC LA LB
LC NAS NCS EAS ECS
Device Name
Wire Number
Device Terminal
Number
18
19
20
21 22 23 24 25 26 27 28
29 30
31 32 33 34
Troubleshooting flowcharts for option DD-18-J begin with Figure 5-36 and conclude with Figure 5-52.
D DD-18-G. Analog frequency meter with fuse. D DD-18-J. Analog voltmeter and ammeter with
fuses.
FM
21
1 2 3 4
5
6
7
8
9
10
11 12 13 14 15 16
17
3FU--BK FM--2
3FU--R 308
T4--BL 407
307 (R)
407 (BL)
T4
3FU
BK R
204 (W) 206 (BK)
PRIMARYSECONDARY
SPLICESPLICE
308 FM--1307T4--R
TBAC1--EA
TBAC1--EC
5604533
Figure 5-27. Wiring Diagram—Option DD-18-G, Analog frequency meter
TP-5672 11/95
Accessory Troubleshooting
5-23
Page 85
Figure 5-28. Wiring Diagram—Option DD-18-J, Analog Volt and Amp Meter
295385
5-24 Accessory Troubleshooting
TP-5672 11/95
Page 86
Figure 5-29. Wiring Diagram—Option DD-18-J, Analog Volt and Amp Meter
295386
TP-5672 11/95
Accessory Troubleshooting
5-25
Page 87
Figure 5-30. Wiring Diagram—Option DD-18-J, Analog Volt and Amp Meter
295387
5-26 Accessory Troubleshooting
TP-5672 11/95
Page 88
Figure 5-31. Wiring Diagram—Option DD-18-J, Analog Volt and Amp Meter
295388
TP-5672 11/95
Figure 5-32. Wiring Diagram—Option DD-18-J, Analog Volt and Amp Meter
Accessory Troubleshooting
295388
5-27
Page 89
No
Is the emergency source available?
Accessory 18-G only displays emergency source frequency.
Is there rated line-to-line voltage at the primary
No No
windings of the transformer?
Replace the leads from terminals TB-AC1-EA and TB-AC1-EC of the power supply board to the transformer.
Is there 120 vac at the
No
secondary winding of the transformer?
Replace the transformer.
Yes
Is there rated line-to-line emergency source voltage between terminals TB-AC1-EA and TB-AC1-EC of the power supply board?
Yes
Is there a transformer wired between terminal TB-AC1-EA of the power supply board and the frequency meter?
Yes
Yes
Yes
No
Refer to Source-Available, Emergency Error Troubleshooting.
No
Is there rated line-to-line voltage between the two frequency meter terminals?
Yes
Is the in-line fuse between terminal TB-AC1-EA of the power supply board and the frequency meter blown?
Yes
Replace the frequency meter.
No
Replace the leads between the transformer and the frequency meter.
Is there 120 vac between the
Yes
two frequency meter terminals?
Replace the frequency meter.
No
Replace the leads between the transformer and the frequency meter.
Figure 5-33. Troubleshooting—Option DD-18-G, Meter will not display frequency
No
Is the in-line fuse between the secondary side of the transformer and the frequency meter blown?
Yes
Replace the fuse between the secondary side of the transformer and the frequency meter.
Replace the fuse between terminal TB-AC1-EA of the power supply board and the frequency meter.
5-28 Accessory Troubleshooting
TP-5672 11/95
Page 90
Use the following table to find the troubleshooting flowchart for Option DD-18-J Current and Voltage meters. Locate the DD-18-J accessory that is used on your transfer switch in the left column. The flowchart numberfor troubleshootingthe voltmeter is in the center column and the flowchart for troubleshooting the ammeter is in the right column.
Options
with
DD-18-
Prefix JA1 Figure 5-36 Figure 5-37 JA2 Figure 5-40 to Figure 5-45 Figure 5-46 JA3 Figure 5-36 Figure 5-37 JA4 Figure 5-38 Figure 5-39 JA5 Figure 5-40 to Figure 5-45 Figure 5-46 JA8 Figure 5-47 to Figure 5-52 Figure 5-46 JA9 Figure 5-47 to Figure 5-52 Figure 5-46 JA10 Figure 5-47 to Figure 5-52 Figure 5-46 JB1 Figure 5-36 Figure 5-37 JB2 Figure 5-40 to Figure 5-45 Figure 5-46 JB3 Figure 5-36 Figure 5-37 JB4 Figure 5-38 Figure 5-39 JB5 Figure 5-40 to Figure 5-45 Figure 5-46 JB6 Figure 5-47 to Figure 5-52 Figure 5-46 JB8 Figure 5-47 to Figure 5-52 Figure 5-46 JB9 Figure 5-47 to Figure 5-52 Figure 5-46 JB10 Figure 5-47 to Figure 5-52 Figure 5-46 JC1 Figure 5-36 Figure 5-37 JC2 Figure 5-40 to Figure 5-45 Figure 5-46 JC3 Figure 5-36 Figure 5-37 JC4 Figure 5-38 Figure 5-39 JC5 Figure 5-40 to Figure 5-45 Figure 5-46 JC8 Figure 5-47 to Figure 5-52 Figure 5-46 JC9 Figure 5-47 to Figure 5-52 Figure 5-46 JC10 Figure 5-47 to Figure 5-52 Figure 5-46 JD1 Figure 5-36 Figure 5-37 JD2 Figure 5-40 to Figure 5-45 Figure 5-46 JD3 Figure 5-36 Figure 5-37 JD4 Figure 5-38 Figure 5-39
Voltmeter Troubleshooting
Ammeter
Troubleshooting
Flowchart
Figure 5-34. Option DD-18, analog meters troubleshooting table
Option 18-JXXX, analog meters
JA1-5, JA8-10 30-5 JB1-6, JB8-10 75-5 JC1-5, JC8-10 100-5 JD1-5, JD8-10 150-5 JE1-5, JE8-10 300-5 JF1-6, JF8-10 400-5 JG1-5, JG8-10 600-5 JH1-5, JH8-10 800-5
Figure 5-35. Transformer Turn Ratio
Options
with
DD-18-
Prefix JD5 Figure 5-40 to Figure 5-45 Figure 5-46 JD8 Figure 5-47 to Figure 5-52 Figure 5-46 JD9 Figure 5-47 to Figure 5-52 Figure 5-46 JD10 Figure 5-47 to Figure 5-52 Figure 5-46 JE1 Figure 5-36 Figure 5-37 JE2 Figure 5-40 to Figure 5-45 Figure 5-46 JE3 Figure 5-36 Figure 5-37 JE4 Figure 5-38 Figure 5-39 JE5 Figure 5-40 to Figure 5-45 Figure 5-46 JE8 Figure 5-47 to Figure 5-52 Figure 5-46 JE9 Figure 5-47 to Figure 5-52 Figure 5-46 JE10 Figure 5-47 to Figure 5-52 Figure 5-46 JF1 Figure 5-36 Figure 5-37 JF2 Figure 5-40 to Figure 5-45 Figure 5-46 JF3 Figure 5-36 Figure 5-37 JF4 Figure 5-38 Figure 5-39 JF5 Figure 5-40 to Figure 5-45 Figure 5-46 JF6 Figure 5-47 to Figure 5-52 Figure 5-46 JF8 Figure 5-47 to Figure 5-52 Figure 5-46 JF9 Figure 5-47 to Figure 5-52 Figure 5-46 JF10 Figure 5-47 to Figure 5-52 Figure 5-46 JG1 Figure 5-36 Figure 5-37 JG2 Figure 5-40 to Figure 5-45 Figure 5-46 JG3 Figure 5-36 Figure 5-37 JG4 Figure 5-38 Figure 5-39 JG5 Figure 5-40 to Figure 5-45 Figure 5-46 JG8 Figure 5-47 to Figure 5-52 Figure 5-46 JG9 Figure 5-47 to Figure 5-52 Figure 5-46 JG10 Figure 5-47 to Figure 5-52 Figure 5-46 JH1 Figure 5-36 Figure 5-37 JH2 Figure 5-40 to Figure 5-45 Figure 5-46 JH3 Figure 5-36 Figure 5-37 JH4 Figure 5-38 Figure 5-39 JH5 Figure 5-40 to Figure 5-45 Figure 5-46 JH6 Figure 5-47 to Figure 5-52 Figure 5-46 JH8 Figure 5-47 to Figure 5-52 Figure 5-46 JH9 Figure 5-47 to Figure 5-52 Figure 5-46 JH10 Figure 5-47 to Figure 5-52 Figure 5-46
Turn ratio of transformer
Voltmeter Troubleshooting
Ammeter
Troubleshooting
Flowchart
TP-5672 11/95
Accessory Troubleshooting
5-29
Page 91
Does the voltmeter read only the Normal source voltage?
Yes
No
No No
Refer to Power to the System Troubleshooting.
No
Replace the leads from terminals TB-AC1-NA and TB-AC1-NB of the power supply board to the source selector switch.
No
Move the source selector switch to the NORM. NA-NB L1 position.
No
Is there rated line-to-line voltage between terminals TB-AC1-NA and TB-AC1-NB of the power supply board?
Yes
Is there rated line-to-line voltage between terminals 32 and 42 of the source selector switch?
Yes
Is the source selector switch in the NORM. NA-NB L1 position?
Yes
Is there rated line-to-line voltage between terminals 31 and 41 of the source selector switch?
Is there rated line-to-line voltage between terminals TB-AC1-EA and TB-AC1-EC of the power supply board?
Yes
Is there rated line-to-line voltage between terminals 38 and 48 of the source selector switch?
Yes
Is the source selector switch in the EMERG. EA-EB position?
Yes
Is there rated line-to-line voltage between terminals 31 and 41 of the source selector switch?
Refer to Power to the System Troubleshooting.
No
Replace the leads from terminals TB-AC1-EA and TB-AC1-EC of the power supply board to the source selector switch.
No
Move the source selector switch to the EMERG. EA-EB position.
No
Replace the source selector switch.
Yes Yes
Replace the voltmeter.
No
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-36. Troubleshooting—Option DD-18-J, Voltmeter is not functioning
Yes
Is there rated line-to-line voltage between the two terminals of the voltmeter?
No
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
Yes
Replace the leads from terminals 31 and 41 of the source selector switch to the voltmeter.
Yes
Is there rated line-to-line voltage between the two terminals of the voltmeter?
No
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
Yes
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Replace the source selector switch.
Replace the voltmeter.
No
Replace the lead from terminals 31 and 41 on the source selector switch to the voltmeter.
5-30 Accessory Troubleshooting
TP-5672 11/95
Page 92
NOTE: The ammeter reads load currents. The source
selectorswitchmust beintheNORM. NA-NBL1 position to read the load current.
Yes
Is the current between terminals 12 and 21 of the source selector switch correct? Refer to Figure 5-35 for the proper turn ratio of the current transformer.
No
Replace the source selector switch.
Replace the ammeter.
Figure 5-37. Troubleshooting—Option DD-18-J, Ammeter is not functioning
Is the current between terminals 11 and 21 of the source selector switch correct?
No
Refer to Figure 5-35 for the proper turn ratio of the current transformer.
Yes
Is the current between the terminal
Yes
of the ammeter correct? Refer to Figure 5-35 for the proper turn ratio of the current transformer.
No
Replace the leads from the source selector switch to the ammeter.
Are the leads from the current transformer to the source selector switch open or shorted?
Yes
Replace the current transformers.
Replace the leads from the current transformer to the source selector switch.
TP-5672 11/95
Accessory Troubleshooting
5-31
Page 93
Does the voltmeter display only the emergency source?
Yes
No
No No
Refer to Power to the System Troubleshooting.
No
Replace the leads from terminals TB-AC1-NA and TB-AC1-NC of the power supply board to the source selector switch.
No
Move the source selector switch to the NORM. NA-NB L1 position.
No
Is there rated line-to-line voltage between terminals TB-AC1-NA and TB-AC1-NC of the power supply board?
Yes
Is there rated line-to-line voltage between terminals 32 and 42 of the source selector switch?
Yes
Is the source selector switch in the NORM. NA-NB L1 position?
Yes
Is there rated line-to-line voltage between terminals 31 and 41 of the source selector switch?
Is there rated line-to-line voltage between terminals TB-AC1-EA and TB-AC1-EC of the power supply board?
Yes
Is there rated line-to-line voltage between terminals 38 and 48 of the source selector switch?
Yes
Is the source selector switch in the EMERG. EA-EB position?
Yes
Is there rated line-to-line voltage between terminals 31 and 41 of the source selector switch?
Refer to Power to the System Troubleshooting.
No
Replace the leads from terminals TB-AC1-EA and TB-AC1-EC of the power supply board to the source selector switch.
No
Move the source selector switch to the EMERG. EA-EB position.
No
Replace the source selector switch.
Yes Yes
Replace the voltmeter.
No
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-38. Troubleshooting—Option DD-18-J, Voltmeter is not functioning
Yes
Is there rated line-to-line voltage between the two terminals of the voltmeter?
No
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
Yes
Replace the leads from terminals 31 and 41 of the source selector switch to the voltmeter.
Yes
Is there rated line-to-line voltage between the two terminals of the voltmeter?
No
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
Yes
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Replace the source selector switch.
Replace the voltmeter.
No
Replace the lead from terminals 31 and 41 on the source selector switch to the voltmeter.
5-32 Accessory Troubleshooting
TP-5672 11/95
Page 94
NOTE: Theammeterreadstheloadcurrent.Thesource
selectorswitchmust beintheNORM. NA-NBL1 or L2 position to read the load current.
Is the ratio of current that L1 is using between terminals 12 and 21 of the source selector switch correct? Refer to Figure 5-35 for the proper turn ratio of the current transformer.
Is the amount of current that L1 is using between terminals 11 and 21 of the source selector switch correct? Refer to Figure 5-35 for the proper
No
turn ratio of the current transformer.
Replace the source selector switch.
Is the correct amount of current load L1 is using between the
No
two terminals of the ammeter?
Replace the ammeter.
Replace the leads from source selector switch to the ammeter.
Yes
Yes
No
No
Does the ammeter display load currents for L1 only?
No
Yes
Are the leads from CT1 current transformer to the source selector switch open or shorted?
Yes
Replace the current transformers.
Replace the leads from the current transformer to the source selector switch.
No
Is the amount of current that L2 is using between terminals 11 and 21 of the source selector switch correct? Refer to Figure 5-35 for the proper
No
turn ratio of the current transformer.
Replace the source selector switch.
Is the amount of current that L2 is using between the terminals of the ammeter correct? Refer to
No
Replace the ammeter.
Figure 5-35 for the proper turn ratio of the current transformer.
Replace the leads from source selector switch to the ammeter.
Figure 5-39. Troubleshooting—Option DD-18-J, Ammeter is not functioning
Yes
Yes
No
Is the amount of current that L2 is using between terminals 13 and 21 of the source selector switch correct? Refer to Figure 5-35 for the proper turn ratio of the current transformer.
Are the leads from CT2
No
current transformer to the source selector switch open or shorted?
Replace the leads from the current transformer to the source selector switch.
No
Yes
Replace the current transformers.
No
TP-5672 11/95
Accessory Troubleshooting
5-33
Page 95
Replace the leads from terminals TB-AC1-NA and TB-AC1-NB of the power supply board to the source selector switch.
Is there rated line-to-line voltage between terminals TB-AC1-NA and TB-AC1-NB of the power supply board?
Yes
Is there rated line-to-line voltage between terminals
No
32 and 42 of the source selector switch?
Yes
No
Refer to Power to the System Troubleshooting.
Is the source selector switch in the NORM. NA-NB L1 position?
Yes
No
Replace the source selector switch.
Is there rated line-to-line voltage between terminals
No
31 and 41 of the source selector switch?
Move the source selector switch to the NORM. NA-NB L1 position.
Yes
Is there rated line-to-line voltage between the two terminals of the voltmeter?
No
Replace the voltmeter.
No
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-40. Troubleshooting—Option DD-18-J, Voltmeter does not read NA-NB voltage
5-34 Accessory Troubleshooting
TP-5672 11/95
Page 96
Is there rated line-to-line voltage between terminals TB-AC1-NB and TB-AC1-NC of the power supply board?
Yes
No
Refer to Power to the System Troubleshooting.
Replace the leads from terminals TB-AC1-NB and TB-AC1-NC of the power supply board to the source selector switch.
Replace the source selector switch.
Is there rated line-to-line voltage between terminals 33 and 43 of the source
No
selector switch?
No
Yes
Is there rated line-to-line voltage between terminals 31 and 41 of the source selector switch?
Is the source selector switch in the NORM. NB-NC L2 position?
Yes
Move the source selector switch to the NORM. NA-NB L1 position.
Yes
Is there rated line-to-line voltage between the two
No
terminals of the voltmeter?
Replace the voltmeter.
No
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-41. Troubleshooting—Option DD-18-J, Voltmeter does not read NB-NC voltage
No
TP-5672 11/95
Accessory Troubleshooting
5-35
Page 97
Is there rated line-to-line voltage between terminals TB-AC1-NA and TB-AC1-NC of the power supply board?
No
Replace the leads from terminals TB-AC1-NA and TB-AC1-NC of the power supply board to the source selector switch.
Replace the source selector switch.
Is there rated line-to-line voltage between terminals
No
32 and 42 of the source selector switch?
Is the source selector switch in the NORM. NA-NC L3 position?
Is there rated line-to-line voltage between terminals
No
31 and 41 of the source selector switch?
Is there rated line-to-line voltage between the two terminals of the voltmeter?
Yes
Yes
Yes
Yes
No
No
No
Refer to Power to the System Troubleshooting.
Move the source selector switch to the NORM. NA-NC L3 position.
Replace the voltmeter.
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-42. Troubleshooting—Option DD-18-J, Voltmeter does not read NA-NC voltage
5-36 Accessory Troubleshooting
TP-5672 11/95
Page 98
Is there rated line-to-line voltage between terminals TB-AC1-EA and TB-AC1-EB of the power supply board?
No
Replace the leads from terminals TB-AC1-EA and TB-AC1-EB of the power supply board to the source selector switch.
Replace the source selector switch.
Is there rated line-to-line voltage between terminals
No
32 and 42 of the source selector switch?
Is the source selector switch in the EMERG. EA-EB position?
Is there rated line-to-line voltage between terminals
No
31 and 41 of the source selector switch?
Is there rated line-to-line voltage between the two terminals of the voltmeter?
Yes
Yes
Yes
Yes
No
No
No
Refer to Power to the System Troubleshooting.
Move the source selector switch to the EMERG. EA-EB position.
Replace the voltmeter.
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-43. Troubleshooting—Option DD-18-J, Voltmeter does not read EA-EB voltage
TP-5672 11/95
Accessory Troubleshooting
5-37
Page 99
Is there rated line-to-line voltage between terminals TB-AC1-EB and TB-AC1-EC of the power supply board?
No
Replace the leads from terminals TB-AC1-EB and TB-AC1-EC of the power supply board to the source selector switch.
Replace the source selector switch.
Is there rated line-to-line voltage between terminals
No
32 and 42 of the source selector switch?
Is the source selector switch in the EMERG. NB-NC position?
Is there rated line-to-line voltage between terminals
No
31 and 41 of the source selector switch?
Is there rated line-to-line voltage between the two terminals of the voltmeter?
Yes
Yes
Yes
Yes
No
No
No
Refer to Power to the System Troubleshooting.
Move the source selector switch to the EMERG. EB-EC position.
Replace the voltmeter.
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-44. Troubleshooting—Option DD-18-J, Voltmeter does not read EB-EC voltage
5-38 Accessory Troubleshooting
TP-5672 11/95
Page 100
Is there rated line-to-line voltage between terminals TB-AC1-EA and TB-AC1-EC of the power supply board?
No
Replace the leads from terminals TB-AC1-EB and TB-AC1-EC of the power supply board to the source selector switch.
Replace the source selector switch.
Is there rated line-to-line voltage between terminals
No
32 and 42 of the source selector switch?
Is the source selector switch in the EMERG. NB-NC position?
Is there rated line-to-line voltage between terminals
No
31 and 41 of the source selector switch?
Is there rated line-to-line voltage between the two terminals of the voltmeter?
Yes
Yes
Yes
Yes
No
No
No
Refer to Power to the System Troubleshooting.
Move the source selector switch to the EMERG. EB-EC position.
Replace the voltmeter.
Replace the lead from terminals 31 and 41 of the source selector switch to the voltmeter.
Is the fuse between terminal 31 of the source selector switch and the voltmeter blown?
YesNo
Replace the fuse between terminal 31 of the source selector switch and the voltmeter.
Figure 5-45. Troubleshooting—Option DD-18-J, Voltmeter does not read EA-EC voltage
TP-5672 11/95
Accessory Troubleshooting
5-39
Loading...