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Always disconnect a.c. to the PM before checking fuses. To replace
the d.c. fuse, the top cover must be removed. The d.c. fuse is an
80LET. Be sure to replace with the same type and value as indicated
on the fuse.
If the battery is connected to the PM output with backwards polarity,
the fuse should blow to protect d.c. wiring. However damage to
internal components may also have occurred. If the replacement
fuse blows, return the PM to the factory for a thorough inspection.
C) Cooling Fans
To maximize the life of the internal components and to allow
continuous operation at full rating, the PM employs automatic
cooling fans. These fans operate at full speed whenever a.c. is
applied and the unit is producing output current.
Preventative Maintenance: The fan is a maintenance-free ball-
bearing type and does not require lubrication.
If the fan fails to operate when the PM is turned on and a load is
applied, it may need to be replaced. (Replacement fans available
from NEWMAR. Replacement Fan with inline connector:
999-3148-0Z). Note: We recommend replacing both fans at the
same time.
System Status/Alarm Condition
Over temperature shutdown
Over temperature recovery
Over voltage shutdown
Loss of temp probe signal
Battery temp too high
Battery over temperature recovery
Loss of AC input
AC voltage applied to
PM
DC-FAIL (Low Output Voltage)
Oring Diode Over Temp Shutdown
Oring Diode Over Temp Recovery
7
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
P.O. Box 1306, Newport Beach, California 92663 • Phone: 714-751-0488 • Fax: 714-957-1621 • E-Mail: techservice@newmarpower.com
AC input
DC Output
System
Alarm
Alarm
Status LED
Contacts
Contacts
OK
Failed
1 red flash
OK
OK
1 yellow flash
OK
Failed
2 red flashes
OK
Failed
3 red flashes
OK
Failed
3 red flashes
OK
OK
3 yellow flashes
Failed
Failed
None
OK
OK
Green
OK
Failed
Green
Failed
Failed
Yellow
OK
OK
Green
www.newmartelecom.com
www.newmartelecom.com
Fan replacement procedure
1. Disconnect ac input power and dc output connections to the
PM. If the battery string is connected it's recommended that it be
disconnected (via a battery disconnect switch or remove the HOT
lead from the battery).
2. Loosen the top five screws on the rear panel which secure the top
cover. Remove the two screws on the sides near front which secure
top cover.
3. Locate the two fans located on one end of the main circuit board,
near the rear of the PM.
4. Remove the two #6-32 s.s. Phillips pan screws with lock washers
securing the fan mounting bracket to the long air baffle plates. Do
not remove the screws attached directly to the fan.
5. On each fan, carefully lift the fan away from the main circuit
board while unplugging the power connector.
6. With the fans removed from the PM loosen the two self tapping
screws that attach the fan mounting bracket- do not remove these
screws. The fan mounting bracket can now be removed from the old
fan and attached to the replacement fan. Important Note: Make sure
Audible
Results
1 beep
PM shuts down at high ambient Temp.
None
Auto recovery with 1 yellow Flash
2 beeps
PM shuts down
3 beeps
PM shuts down and requires the
AC input to be recycled
3 beeps
PM shuts down then automatically
recovers with 3 Yellow flashes
None
Auto recovery with 3 yellow flashes
None
PM shuts down
None
LED will remain green if the DC output is
within the Regulation band
None
Triggers between 35-40VDC
None
PM shuts down.
None
PM goes though soft start sequence.
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