Leviton mini meter MMU, Installation Manual, Page: 21 / 64

6 TROUBLESHOOTING / FAQ
Problem Solution
1. LCD not illuminated • Check to make sure all connections are
wired properly
• Test the voltage being supplied to the
meter using an AC voltmeter
• Remove fuses and test with ohmmeter
2. Load LED not flashing • Verify CT connections and orientations
• Make sure there is sufficient load to draw a
significant current
• Test the voltage being supplied to the
meter and ensure phases are connected
to correct location on MMU terminal block
3. Registered consumption low • Check to make sure the reverse phase
arrow is not shown on the LCD
• Double-check CT orientations
• Make sure that current and voltage
connections are in phase.
• Check power connections and fuses
4. Counter isn’t incrementing • Verify the Load LED is working
• On Mini Meters, verify that counter wires
are connected to COUNTER terminals
Q: Can voltage input wires and current sensing leads be routed through the
same conduit?
A: Yes, provided you are using Leviton supplied CTs. Alternate CTs must have
18 AWG min. wires with at least 300 VAC insulation rating.
Q: Can digital output wires be routed through the same conduit as voltage
input and current sensing wires?
A: No. In accordance with NEC and UL requirements, Class 2 wiring (digital outputs)
must be separated from Class 1 wiring.
Q: I still can’t get my meter to work, what now?
A: Contact technical support via phone or on our website given in the following
section.
21
WEB
VERSION