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ELECTRICAL
This article provides an operational overview of the Precision Circuit Midi-Power Control System Monitor Panel (Models: 00-
10050-550, 00-10050-552, 00-10050-553).
Precision Circuits Midi-Power Control System Monitor
Panel Operation
(Models: 00-10050-550, 00-10050-552, 00-10050-553)
Overview
Service Type
One of several options will be displayed indicating the
power available to the RV.
•
Service None: When the RV is not receiving any
external power the Display Screen will indicate that
there is no service.
Load Status
After Service Type, pressing Scroll Button will scroll
through all the appliances Midi-PCS controls.
•
WaterHtr Powered: Midi-PCS controls up to 5
appliances or loads. This is an example of one of the
appliances the Midi-PCS may shed, should it sense
over-current. The user can press SCROLL to view all
of the appliances the Midi-PCS controls. If the RV is
not trying to use too much current, then the load will
have power available and displayed as such. Note:
this does not mean the appliance is on, just that
power is available.
The display is there to help the RV user understand
power management and the function of the Midi-PCS.
The Midi-PCS monitors the total AC current of an RV
and prevents circuit breaker tripping by momentarily
shedding up to five loads. As the user turns on additional
appliances (such as a microwave, coffee pot, or hair
dryer), the Midi-PCS can shed the loads that it controls,
(such as the water heater & air conditioner). As the user’s
selected appliances are turned off, and a minimum of
2 minutes has expired, the Midi-PCS will automatically
turn power back on each of the shed loads in reverse
sequence.
The Midi-PCS will constantly monitor 120VAC RV power
and shed and restore power to the five controlled loads.
The display panel has all the brains, a data connector to
the I/O module, and an additional connector to control
the air conditioners through low voltage signals. The I/O
Module houses a current sensor, two relays to control
120VAC powered appliances, and Service Type detect
circuitry.
As the Scroll Button is pressed, different information will
become available on the Display Screen.
For more information about the energy management
system, refer to the SilverLeaf Coach Management or
Precision Circuits Power Control System documentation
found in Newgle, depending on which system is installed
in the coach.
•
Service 50A: Midi-PCS automatically senses 240VAC
between L1 and L2 to determine this mode of
operation. It assumes enough power is available,
turns on power to all appliances, and does not
perform any energy management functions.
•
Service 30A: Midi-PCS automatically senses 0VAC
between L1 and L2, and 120VAC between L1 and
Neutral, to determine 30A Service. The I/O Module
has a current sensor which monitors total RV current.
When the current exceeds the 30-amp limit, the
Midi-PCS will limit current by shedding appliances
that it controls. Once the RV current has dropped,
the procedure will be reversed and power will be
restored to the shed appliance.
•
Service 20A / Service 15A: Midi-PCS automatically
senses 0VAC between L1 and L2, and 120VAC
between L1 and Neutral, to determine 30A Service.
The I/O Module has a current sensor which monitors
total RV current. When the current exceeds the 30-
amp limit, the Midi-PCS will limit current by shedding
appliances that it controls. Once the RV current has
dropped, the procedure will be reversed and power
will be restored to the shed appliance.
•
Generatr 45A: Midi-PCS senses the Generator Hour
Meter signal to know the Generator is running.
When the generator first starts, Midi-PCS performs
a soft start, shedding all the appliances, and turning
them back on one at a time, after a 2-minite delay.
The Midi-PCS operates the same as above, except
the current limit is adjusted to match the size of
Generator.
Summary of Contents for Bay Star 2022
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