H8051/H8053
Z201659-0N
PAGE 5
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TM
INSTALLATION GUIDE
TROUBLESHOOTING
Problem
Solution
Status LED does not blink
Check fuses and voltage connections. Status LED should
blink regardless of CTs, pulse output connections, and
DIP switch setting.
Readings seem highly inaccurate. • Check that each CT is installed on the conductor with
the corresponding color voltage input lead attached. In
most cases, incorrect wiring will cause the STATUS LED
to blink RED (slowly). However, a power factor lower
than 0.5 could cause the LED to blink this way, even if
the unit is installed properly.
• It does not matter which side of the CT faces towards
the load.
• If current is below 7% of full scale maximum for the
CT, use a smaller CT or wrap each wire through the CT
multiple times
• If using the single-phase H8051, use an amp-clamp
to ensure that all three phases are passing the same
approximate current. If phases are unbalanced, try the
H8053 model.
Meter goes offline when load is
switched off.
Voltage leads must be connected on the Line side of
the conductor. The power meter cannot communicate
without voltage.
Status LED blinks red.
• If the LED blinks quickly (i.e., about 5 blinks in two
seconds), then either the pulse rate settings are
incorrect or the CT used is too small.
• If the LED blinks slowly (i.e., about 1 blink per second)
the CTs are not installed on the correct conductors,
or the power factor is less than 0.5. The meter can
accurately measure these low PFs, but few loads
operate normally at such a low power factor.
• If the LED blinks slowly (i.e., about 1 blink per
second), the monitored load might be less than 10%
of the CT maximum ratings.
NOTES
1. Insulate all output cable wires to prevent accidental contact to high voltage
conductors.
2. Mechanically secure the output cable where it enters the electrical panel.
WARNING: After wiring the cable, remove all scraps of
wire or foil shield from the electrical panel. This could be
DANGEROUS if wire scraps come into contact with high
voltage wires!
