Owner`s manual

3.0 Installation

3.15 Functional Test

After all electrical connections from the MMP enclosure to the inverter, batteries, AC source, and

sub-panel have been completed; follow these steps and refer to Figure 3-28 to test the installation

of the MMP enclosure and verify proper operation of the BYPASS switch breakers.

WARNING: During this Functional Test, the front cover is removed and exposes

personnel to potential dangerous voltages and shock hazards inside the MMP enclosure

that may cause damage, injury, or death. If you do not have experience working with

AC and DC voltage circuits, do not attempt this test - use an experienced electrical

installer.

CAUTION: During this Functional Test, if any step cannot be veriﬁ ed or is incorrect,

stop and recheck/correct the connections before proceeding to the next step.

1. Turn OFF all AC breakers (i.e., INV BYP, INV IN and INV OUT) in the MMP enclosure.

CAUTION: Use a multimeter to verify the correct DC voltage for your particular inverter

model (i.e., 24-volt battery bank for a 24-volt inverter) and ensure the polarity of the

battery voltage is correct [battery positive (+) connected to the inverter positive terminal

thru the DC circuit breaker and battery negative (-) connected to inverter negative

terminal thru the DC shunt].

CAUTION: Prior to turning on the inverter, turn OFF all inverter loads in the Inverter

Load panel (i.e., sub-panel).

2. After verifying the proper battery bank voltage for your inverter and the battery cable

connections are the correct polarity, apply battery power to the inverter by turning the Inverter

DC disconnect breaker to the ON (up) position.

3. Turn the inverter ON.

a. Connect an AC voltmeter to the Inverter Output Terminals and verify the correct AC

output voltage of the inverter (depends on your inverter AC output voltage).

Info: If the inverter does not turn on - verify the DC connections to/from the inverter to

the battery, and/or refer to the Troubleshooting section for your particular inverter.

Info: If the inverter has a Search mode feature, the inverter’s AC full output voltage

will not be present/correct until Search is turned OFF, or by connecting a large enough

light bulb to bring the inverter out of Search. DO NOT connect anything but a light bulb

until all wiring and voltages are conﬁ rmed to be correct.

If using a Magnum inverter, use a light bulb greater than 5 watts (5 watts is the default

setting) to bring the inverter out of Search mode; or, the Search mode can be turned

OFF with a remote control (ME-RC or ME-ARC).

4. Turn ON the INV OUT

breaker(s) in the MMP enclosure.

a. Ensure the inverter AC output voltage is passing thru the INV OUT (Inverter Output) breaker

by verifying the correct output voltage is present on the AC Output Terminals.

5. Turn ON the INV BYP

breaker(s) in the MMP enclosure.

a. Ensure the inverter AC output voltage is no longer present on the AC Output Terminals.

6. Apply power from an external AC source (utility or AC generator) to the AC Input Terminals.

a. Connect an AC voltmeter to the Inverter Output Terminals and verify the AC voltage from

the external AC source is present. Move the AC voltmeter to the AC Output Terminals and check

that the AC source power is passing thru the INV BYP (Inverter Bypass) breaker by verifying

the AC source voltage present earlier is also present on the AC Output Terminals.