4000
Ͳ
LC
Series
D4580880
Ͳ
01
Page
55
of
61
13.0 Troubleshooting:
1. Unit connected to power source, no Display.
a)
Verify input voltage on all 3 phase legs.
b)
Check the main input breaker is on. To access all circuit breakers, the front
sheet metal which holds the display must be removed, using a Philips head
screwdriver. The Mains input breaker is located in the upper right corner of
the electrical controls.
c)
Check that all other circuit breakers are on.
2. Display is on but shows an error screen stating there is a “PHASE MONITOR
FAILURE”.
a) On initial startup check all 3 phases. The rate chamber monitors for
the correct phase sequence. Switch 2 of the phase wires at the
receptacle or power panel.
b) A loss of power of any phase can also cause this error.
Reaching
inside
of
the
cabinet
while
the
unit
is
energized
can
be
dangerous.
Always
unplug
the
unit
and
lockout
the
power
supply
before
performing
maintenance
inside
of
the
unit
