NewMar Centurion II Power System Installation & Operation Manual page 16

Dc power system -48 vdc and +24 vdc
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Battery Temperature Low (non-urgent)
 
 
Room Temperature High (non-urgent)
 
 
Room Temperature Low (non-urgent)
 
 
When an AC Monitoring PCB is not fitted at system level (as in most cases), the AC
Fail alarm is generated from the rectifiers. The rectifiers sense if AC is present, and
extend an AC fail alarm to the SM36. Therefore, to test this alarm, simply turn off the
rectifier AC breakers. To allow the monitor to continue to read alarms there must be
DC present on the output of the system.
As this causes the rectifier output to cease, a Rectifier Fail alarm is also generated.
To generate the Urgent Rectifier Fail, turn off the required number to make this occur
(Usually set to 1, but check via the SM36 Config software for the setting (under the
"Rectifier Control" section of the "Power Module Control" tab)).
 
 
AC Fail (urgent)
 
 
Rectifier Fail (non-urgent)
 
 
Urgent Rectifier Fail (urgent)
 
 
To check Load MCB Open, connect a load, but with no load turned on. Then switch
the breaker to it's off position and turn on some load (any amount will do). This will
cause the alarm to occur as the load side to the circuit will be taken to system
common voltage. Turn off the load, and then return the breaker to its ON position.
 
 
Load MCB Open (urgent)
The battery circuit breakers use auxiliary contacts to detect tripping or
 
whether they are turned off. This is because when a battery breaker is
tripped, there may be very little voltage difference, making electronic fail
detection problematic. Hence, if only one battery is connected, both breakers
must be "on" to clear the Battery Breaker Fail alarm.
To check Battery MCB open alarm, turn off the battery circuit breaker.
 
 
Battery MCB Open (urgent)
 
 
To check the Surge Protection Failed alarm, simply pull the MOV out. This switches
a micro-switch within the SPD unit. Once pulled, observe the alarm, and re-insert
the MOV block and observe the alarm clear. (Only available when SPD is fitted in the
system).
 
 
MOV (SPD) Fail (urgent)
 
 
A Rectifier Off Normal alarm is generated with the rectifier enters a state that may
degrade its performance (e.g., a single fan fail), or a state that is outside of normal
operating conditions (e.g., high temperature, or current limit).
 
You can observe an Off Normal alarm when the system is placed in current limit, or
you may wish to stop a fan to generate the alarm. The best way to stop a fan is to
use a small cable tie (non-metallic), and push it approximately 1cm through the
rectifier grille.
 
 
Rectifier Off Normal (e.g., fan failed) (non-urgent)
 
• Phone: 714-751-0488 • E-mail: techservice@newmarpower.com
 
 
 
 
 
 
Newmar • PO Box 1306, Newport Beach, CA 92663
 
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