V) Application Notes; A) Constant Versus Occasional Use; B) Proper Load Sizing; C) Operation With Engine - NewMar PT-24-45W Bb8Db2Cc8C9B8A4Bb2Bbe763F

1) One Red Flash-Beep: Cause: The charger's internal module
is too hot and the charger output has shut off. This may be due
to high ambient temperature, insufficient clearance around the
charger resulting in poor ventilation, fan failure, or debris causing
a blockage of the fan exhaust vent at the bottom of the charger.
Corrective Action: Turn charger off at the A.C. source. Verify proper
clearance, remove debris (see section V-D, cooling fans) and, if
necessary, relocate charger to a cooler location. Turn charger back
on to resume normal operation and L.E.D. indications. Note: Even
if no corrective action is taken, when the charger cools sufficiently
by itself then it will automatically return to service and the L.E.D.
indicator will begin to display a series of single yellow flashes
(see item 5 below). If this type of thermal cycling is noted, and
continues after all of the above corrective actions are taken, please
contact the factory.
2) Two Red Flash-Beeps: Cause: The Over Voltage Protection
(OVP) circuit has been activated and charger output has shut
down. The purpose of this circuit is to protect batteries and load
against damaging high output voltage in the event of an internal
malfunction or component failure. This circuit may also be
activated if the charger is putting out high current into heavily
discharged batteries and the batteries are abruptly switched off of
the output (called a load dump). The abrupt removal can cause an
output voltage spike which triggers this circuit. Corrective Action:
Verify proper connection of charger output terminals to batteries.
Turn charger off for a few seconds, then back on again to resume
normal operation and L.E.D. indications.
3) Three Red Flash-Beeps: Cause: Battery temperature is too hot and
the charger is shut off. (Note: The optional thermal probe must be
installed for this diagnostic function to operate. See section III-H for
complete information.) This may be due to extremely high ambient
temperature in the battery environment, such as when installed
in a hot engine room. It may also be due to a shorted cell in one
of the batteries, causing "thermal runaway". Corrective Action:
Turn charger off. Relocate batteries to a cooler area or improve
ventilation and/or check for a shorted cell in each battery—refer
to BATTERY CARE TIPS section for procedure or refer to battery
manufacturer for recommendations. Turn charger back on to
resume normal operation and L.E.D. indications.
Note: This shutdown/warning will also occur if the temperature
sensor is plugged in or unplugged while the charger is in operation.
If this is the case, make sure the plug is properly inserted and shut
the charger off and then back on; normal operation will resume.
If the battery cools sufficiently for safe charger operation, the
charger will automatically return to service, however the L.E.D.
indicator will begin to display a series of three yellow flashes (see
item 6 below).
4) Glowing Yellow: Isolation diode too hot or has failed. Cause: High
load current and high ambient temperature. Corrective Action:
Turn charger off at a.c. source. Verify proper clearance, remove
debris (see section V-D, cooling fans) and if necessary, relocate
charger to a cooler location. Charger should return to service once
it cools down. If this shut down occurs at high loads and ambient
temperatures, the isolation diode may be defective - contact
factory.
5) One Yellow Flash: Cause: Charger was too hot and shut down
but has cooled sufficiently and has returned to service. Corrective
Action: Refer to Item 1 of this list of indications.
6) Three Yellow Flashes: Cause: Battery was too hot but has cooled
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P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
sufficiently and charger has returned to service. Corrective Action:
Refer to Item 3 of this list of indications.
In each of the above cases, if corrective action has been taken and
the charger has been shut off and turned back on, but does not
resume normal operation, refer to the TROUBLESHOOTING section or
contact the factory for assistance.

V) APPLICATION NOTES

A) Constant Versus Occasional Use

In general, it is recommended that the charger be left connected
continuously to A.C. power so that it will be in operation whenever
A.C. is available. This will maintain batteries at peak voltage and
will automatically compensate for the natural self-discharge of the
battery system. When a load is applied to the battery system the
charger's output will automatically increase to supply the current
which would otherwise draw battery voltage down. Repeatedly
allowing batteries to become completely discharged before
recharging will greatly shorten their life. Leaving the charger on
continuously will prevent this.
While the output regulation of the charger will minimize battery
gassing and water loss, monthly checks of the electrolyte level
(for wet lead acid batteries) are still strongly recommended.
Some water loss is an inevitable aspect of the charging process,
and maintaining the correct electrolyte level in your batteries is
the most important thing you can do to assure their maximum
performance and long life.

B) Proper Load Sizing

The Phase Three Charger is rated for continuous duty. While
the charger cannot be damaged by overloads that exceed its
continuous rating, excessive load demands may draw battery
voltage down faster than the charger can resupply it. If battery
voltage continues to drop, check to ensure that your average D.C.
loads are not exceeding the charger's rated output at full (float)
voltage. (Refer to SPECIFICATIONS section for Max Current ratings.)
If loads exceed this rating, you may wish to consider adding
another charger in parallel to provide sufficient power for your
requirements. (See section III-F) Multiple Unit Parallel Wiring.)

C) Operation With Engine

It is perfectly acceptable to allow the charger to remain on
when the engine is started and while it is running. The current
limit feature of the Phase Three Charger will protect against any
damage due to the high current demands of engine cranking.
Output diodes will prevent any back-feed of current into the
charger from the alternator while the engine runs.
As the alternator starts to charge the battery, the charger output
will decrease. When the battery voltage exceeds the rated output
voltage of the charger it will cease charging and will have no
output as long as the batteries are in this high state of charge. If
the battery voltage should drop below the charger's rated output
voltage it will automatically return to service.

D) Cooling Fans

1) Operation
To maximize the life of the internal components and to allow
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