Generac Power Systems Digital Controller R-200A Technical Manual: Active Alarm; Re-crank; Normal Exercise Mode; Low Speed Exercise

Generac power systems digital controller technical manual.
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ACTIVE ALARM

Low Oil Pressure, High Coolant Temp, Low Coolant
Level, Overspeed, Overcrank, Engine Speed Signal
Loss and a Dead Battery indication will all be latched
shutdowns. In the event one of these conditions
occurs, the unit will be shut down, the appropriate
LED will be illuminated, and the unit will not start
again without manual intervention (see Re-Crank
below).
RE-CRANK
If an engine speed signal failure occurs while the gen-
erator is running the engine will shutdown and then
attempt a re-crank. A maximum of two re-cranks will
be attempted after which the overcrank LED will be
set. If the engine speed signal failure occurred during
the engine exercise mode the exercise timer will con-
tinue from where it was at the start of the re-crank
and is not reset.
NORMAL EXERCISE MODE
To select this mode, place DIP switch position 3 in
the ON position.
In Normal Exercise Mode the generators will exercise
at their normal running speed.
The R-200A controller will start and run the genera-
tor once every seven (7) days for approximately 12
minutes. If the utility fails during the exercise period,
this exercise period is aborted and the R-200A
Controller transfers the load to the generator output,
assumes automatic operation and continues to run
until the utility is returned.
The weekly exercise cycle is set as follows:
1. Place the AUTO/OFF/MANUAL switch in the
AUTO position.
2. Press and hold the "Set Exercise Time " switch for
five (5) seconds and then release.
At this time all five (5) red LED's will flash for 10
seconds, then the engine will start and run for it's
12 minute exercise period, then shut down. The gen-
erator will now start and run each week at approxi-
mately the same time.
If battery power to the R-200A Controller is lost, the
weekly exercise time setting will be lost. This is indi-
cated by all five (5) red LED's continually flashing in
ATS mode. In this state the generator will still start
and run in MANUAL mode, or automatically start and
run if utility voltage is lost while in AUTO mode, but
it will NOT perform a weekly exercise cycle.
In the event of a failure while running in this mode,
the five (5) red LED's will stop flashing, the indi-
vidual fault LED will turn on and the engine will be
shut down. Once the AUTO/OFF/MANUAL switch is
switched to OFF , the individual fault LED will turn off
and the five (5) red LED's will begin flashing to show
that the exercise mode has not yet been set.
6
General Information
R-panel Technical Manual
LOW SPEED EXERCISE
To select this mode place DIP switch position 3 in the
OFF position.
In Low Speed Exercise mode the normal speed 3600
rpm generators will exercise at 1800 rpm. The nor-
mal 1800 rpm generators will exercise at 1400 rpm
in this mode.
If the utility fails during the low speed exercise period,
a 10 second timer will start. If the utility returns to
a normal operating level, during this 10 second time
interval the low speed exercise operation will contin-
ue. If the utility is still not present (i.e. utility voltage
less than 60% of nominal) when the above 10 second
timer expires then the low speed exercise mode is
terminated and the engine will ramp up to its normal
running speed within five (5) seconds. If the utility
returns during the five (5) second ramp-up period
the generator will terminate the exercise mode. If the
utility is still not present, once the generator is up
to its normal running speed, then the controller will
transfer the load to the generator. When the utility
returns the generator will shutdown.
If battery power to the R-200A Controller is lost, the
weekly exercise time setting will be lost. This is indi-
cated by all 5 red LED's continually flashing in ATS
mode. In this state the generator will still start and
run in MANUAL mode, or automatically start and run
if utility voltage is lost while in AUTO mode, but it will
NOT perform a weekly exercise cycle.
In the event of a failure while running in this mode,
the five (5) red LED's will stop flashing, the indi-
vidual fault LED will turn on and the engine will be
shut down. Once the AUTO/OFF/MANUAL switch is
switched to OFF , the individual fault LED will turn off
and the five (5) red LED's will begin flashing to show
that the exercise mode has not yet been set.
AUTO START
This unit is designed to automatically start in the
event of a utility failure. A utility failure is defined as
the utility voltage being less than approximately 60%
of nominal, while the utility is considered good when
it is restored to approximately 80% of its nominal
value.
If the generator is already running under exercise
when an auto start is required, it will simply transfer
the load after a 15 second delay and then switch to
auto operation.

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