OPERATION
Copyright
Trace Engineering Company, Inc.
5916 - 195th Street N. E.
Arlington, WA 98223
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
SW Series Inverter/Charger
Part No. 2031-5
Rev. B: Sept 1, 1999
Page
79
GENERATOR STOP COOL DOWN PERIOD
When the automatic generator stop system is used to stop the generator, the generator is disconnected
from the inverter first by opening the AC relay inside the inverter. This allows a very clean transition from
the generator to the inverter. The STOP signal is provided immediately if the generator is manually shut
off from the Control Panel. If the generator is shut off automatically the generator will be allowed to run for
an additional 40 seconds before the STOP signal is provided. This allows the generator to cool down
before it is turned off. This is very important for turbocharged generators as it allows cooler oil to reach the
turbo. If the generator does not stop after the 40 second cool down period when the stop signal is sent,
then the inverter will reconnect to the AC source and remain connected as long as it is available.
If the generator is stopped manually from the Control Panel, the generator is stopped immediately with no
cool down.
GENERATOR ERROR CAUSES
The red ERROR LED indicator will blink slowly if one of the following generator errors occurs:
•
GEN UNDER/OVER SPEED: Indicates that the generator has synchronized with the inverter/charger
but the frequency is not well adjusted (63 - 67 on the high-end or 53 - 57 on the low end).
•
GENERATOR START ERROR: The automatic control system will attempt to start the generator 5
times by closing the starting relay RY8 for up to the MAX CRANKING SECONDS setting, or the
inverter senses an AC voltage above 80-volts AC on the AC HOT IN 2 terminal. Once the inverter
senses 80 volts AC on the AC HOT IN 2 terminal, after a half-second delay, RY8 opens. After
successfully running for 5 minutes, the start attempts counter resets to zero. If the generator dies
within the 5-minute period of being started, the inverter will attempt to restart the generator. An
unsuccessful run is considered a failed start attempt. After 5 start attempts, the ERROR LED
illuminates and the generator control system shuts down. If the generator dies after successfully
running for 5 minutes, the start attempt counter will be reset to zero and the inverter will only restart
the generator if the auto start voltage setting or load amps AC setting is reached for the required time
delay period.
•
GENERATOR SYNC ERROR: Indicates that the generator was running but was not operating within
the voltage and frequency tolerances and not able to connect (out of sync), or the unit can not
maintain synchronization (AC voltage or frequency is out of tolerance).
•
GEN MAX RUN TIME ERROR: Indicates that the generator ran for a period of time that exceeded the
SET MAXIMUM RUN TIME setting. This setting is intended to indicate excessive generator operation
if the system has not been able to fully charge the battery. Operating heavy loads while charging, an
unstable generator or even low electrolyte levels in the battery can cause this. This may also occur
with systems that have very large batteries, requiring long charge periods, or systems with small
generators with limited battery-charging ability. If the default value results in repeated error conditions,
increasing the SET MAXIMUM RUN TIME menu item setting may be necessary for your application.
When using the automatic generator control system to complete a equalization cycle, the additional
time required for the EQ cycle should be considered in order to prevent reaching the SET MAXIMUM
RUN TIME menu item setting and causing a GEN MAX RUN TIME ERROR. This is an advisory error
only and does not stop the generator.
To clear a generator start error, access the SET GENERATOR menu item by pressing the green GEN
MENU button and move the cursor from AUTO or ON to OFF in the SET GENERATOR menu item. This
clears all the generator error conditions and resets the start attempts counter.
Summary of Contents for SW II - REV 4.01
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