Onan 300-4296 Use and care manual

Replacement Onan®
300-4296(12V)
300-4297 (24V)
ENGINE MONITOR
(FS Part No. 56-4296-00
or 56-4297-00)
FLIGHT SYSTEMS
207 Hempt Rd. Mechanicsburg, PA 17050 Ph: 717-590-7330 www.flightsystems.com
Designed & Built in USA by
Thank you for choosing Flight Systems P/N 56-4296-00 for the replacement of Onan®P/N 300-4296 (12V), or P/N 56-
4297-00 for the replacement of Onan®P/N 300-4297 (24V). It will replace all revisions of the original Onan®product
on systems using 2 to 12 lights. Revisions made by Onan®over a period of about three decades include the following:
• Glass fuses replaced by AT-type blade fuses
• Addition of TB3
• Addition of feature selection jumpers
• AdditionofW10toselectashingorsteadyforSWITCHOFFindication
• Addition of diagnostic LEDs to aid in troubleshooting
• ACstartdisconnect(K10)changedfromanACrelaytoaDCrelay
You will notice that this new Flight Systems replacement board looks quite different from any of the Onan®boards.
The most striking difference is the microprocessor-based design which enhances reliability and eliminates 17 of the 20
relays. Additional features include:
• Auto-reset on initial power-up
• Plainly marked DIP switches for feature selection (no jumpers)
• Plainly marked, user-friendly, on-board LED array for easier system troubleshooting
• Solid-stateACvoltagesensingforcranktermination
• Surge and reverse polarity protection
• Reverse polarity indication warns of incorrect battery connection
• Commonalarmoutputisupgradedto5A
• Solid-state outputs for annunciators
• Lamp test for both local and remote annunciators
• Crankinglimitedto60secondswhencontinuouscrankisselected
• Network communications capability possible with Modbus option
You will also notice that the diagnostic LEDs are arranged in an orderly and easy-to-read fashion and that DIP switches
have replaced movable jumpers for feature selection. Table 1 below shows how to set the DIP switches. The “ON”
position is always to the right. For example, FAULT 1 is set up using S1, S2 and S3. If S1 is ON, FAULT 1 is enabled
15 seconds after RUN is detected. If S1 is OFF, FAULT 1 is enabled immediately when RUN is detected, without any
delay. If S2 is ON, FAULT 1 will cause a shutdown. If S3 is ON, FAULT 1 is enabled always, running or not, there
is no shutdown and the settings of S1 and S2 do not matter. In other words, S3 must be OFF to enable the selection
of delay or shutdown using S1 and S2. FAULT 2 works exactly the same way using S4, S5 and S6. The settings for
S7 through S10 are explained, along with the factory settings for all of the DIP switches in Table 1 - SEE REVERSE.

WARRANTY POLICY This Flight Systems manufactured re-
placement generator/ATS control is warranted to be free from defects
in materials and workmanship for a period of two years from the date
it was sold. (This date appears on unit label)
Flight Systems’ Limited Warranty covers the repair or replacement
of defective product within the warranty period. It does not cover the
cost of installation, or removal costs incurred, or possible damage to
other equipment (including the generator or parts thereof) as a result
of this product.
Flight Systems (or its authorized agent) shall reserve the right to de-
termine the cause of malfunction. In the case if we determine that it
was due to abuse, misuse, improper installation, acts of nature (such
as storms), failure to perform recommended gen set maintenance
procedure or problems elsewhere in the gen set, the warranty claim
shall be disallowed and established repair rates shall apply. Ship
defective units directly to:
Flight Systems, 207 Hempt Rd. Mechanicsburg, PA 17050
- Attention: Warranty Repair
Please prepay all freight charges and note the nature
of the failure, if known.
NOTE: The standard
56-4296-00 and 56-
4297-00 boards are
factory set to use “bat-
tery voltage” as the
start command signal
(W3 & W4 = B). On
special request, these
boards can be fur-
nished to use “ground”
as the start command
signal (W3 & W4 =
A). Table 2 below
shows how to set the
DIP switches if you
want to keep the fea-
ture selection settings
the same as on the
board being replaced.
RETURN POLICY Unwanted items may only be returned within 30 days of original purchase date. Refund/
credit issued shall be less a 25% per item restocking/re-test fee as long as unit is in new, undamaged condition. Ship-
ping charges are not refundable.
TECHNICAL SUPPORT
Technical support is available by phone, fax or the internet for this and all Flight Systems products.
Phone: [phone] (8:00am - 4:30pm ET, M-F)
Fax: [phone] Email: [email protected] Web: www.flightsystems.com