5-55
Accessory Troubleshooting
TP-5672 11/95
When the Automatic-Transfer/Manual-Transfer key
switch is in the Manual position, the Not-In-Automatic
LEDilluminates.WhenthesystemisintheManualmode
and is waiting to be transferred to a new power source
after all the time-delays have completed timing, the
System-Alert LED illuminates and MANUAL
TRANSFER appears on the LCD.
If the system is waiting to be transferred to a new
power source while in the Manual mode, but the
System-Status, System-Alert LED does not illuminate
and MANUAL TRANSFER does not appear on the
LCD, connect TB-DC1-20 to TB-DC1-34.
a. If after grounding TB-DC1-20 the System-
Status, System-Alert LED illuminates and
MANUAL TRANSFER appears on the LCD
while the system is waiting in the Manual mode
to be transferred to a new power source, verifly
that the Automatic-Transfer/Manual-Transfer
keyswitchisintheManualTransfer positionand
check the wiring to the Automatic-
Transfer/Manual-Transfer key switch for an
open.
b. If after grounding TB-DC1-20, the System-
Status, System-Alert LED does not illuminate
and MANUAL TRANSFER does not appear on
the LCD while the system is waiting in the
Manual mode to be transferred to a new power
source, check the P2 ribboncableconnectionto
the main logicboard by performing thefollowing
steps.
(1) Remove all power sources.
(2) Wait for 30 seconds.
(3) Makingsurenot tobendor breakany of the
pins,removetheP2ribboncableconnector.
(4) Inspect the pins on the P2 ribbon cable
connector.
(5) Ifpinsarebent,carefullybendthemback.If
pins arebroken, the ribboncableconnector
is defective. Replace the ribbon cable
connector.
(6) Carefully reconnect P2 ribbon cable
connector.
If the P2ribboncableconnectionisgood, connectP2-24
to TB-DC1-34. If the System-Status, System-Alert LED
is illuminated when P2-24 is grounded, but not when
TB-DC1-20 is grounded, replace the power supply
board. If theSystem-Status, System Alert LED doesnot
illuminate when P2-24 is grounded, Replace the logic
board assembly.
Troubleshooting the Off Position
Automatic-Transfer/Manual-Transfer Key
Switch
If the Automatic-Transfer/Manual-Transfer key switch is
in the Manual position, the following events occur.
When the normal source fails:
1. The Source-Available, Normal LED turns off.
2. The Time-Delay, Engine-Start-On LED illuminates
indicating the engine start time delay is timing.
3. TheTime-Delay, Engine-Start-EndLEDilluminates
indicating the engine has been signaled to start.
4. TheSource-Available,EmergencyLEDilluminates.
5. The System-Status, System-Alert LED flashes.
6. TheLCDdisplaystheMANUALTO OFF message.
PresstheManual-Transfer-To-Off Pushbutton.The
contactor transfers to the off position. The
Contactor-Position, Normal LED turns off, and the
Contactor-Position, Off LED illuminates.
7. WhentheOfftimedelaytimes outtheLCDdisplays
MANUAL TRANSFER. Push the manual transfer
to emergency pushbutton. Thecontactortransfers
to the emergency position. The Off Position LED
turns off and the emergency position LED
illuminates.
When the normal source returns:
1. The Source-Available, Normal illuminates.
2. The Time-Delay, Emergency-To-Normal-On LED
illuminates indicating the emergency-to-normal
time delay is timing.
3. The Time-Delay, Emergency-To-Normal-End LED
illuminates indicating the time delay has completed
timing.
4. TheSystem-Status, System-Alert LED flashesand
the LCD shows the MANUAL TO OFF message.
5. PresstheManual-Transfer-To-Off Pushbutton.The
contactor transfers to the Off position.
6. WhentheOfftimedelaytimes outtheLCDdisplays
MANUAL TRANSFER. Press the manual transfer
tonormalpushbutton. Thecontactorwilltransferto
the normal position. The Off PositionLED turns off
and the normal position LED illuminates.
7. The Time-Delay, Engine-Cooldown-On LED
illuminates showing that the generator set engine
cooldown timer is timing.
8. The Time-Delay, Engine-Cooldown-End LED
illuminatesmomentarilyastheengineis signaledto
shut down.
9. The Source-Available, Emergency LED turns off.
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