12
E6
–
cell
out
of
range
warnings:
loose
cable,
check
cable
The
temperature
controller
is
not
receiving
reasonable
responses
from
either
the
cell
tower
or
heat
exchanger
sensors.
Since
it
is
very
unlikely
for
both
to
fail,
probably
a
cable
is
loose.
E7
–
heat
exchanger
error
warnings:
loose
cable,
sensor
failure
The
temperature
controller
is
not
receiving
a
reasonable
response
from
the
sensor
on
the
heat
exchanger.
Either
the
sensor
has
failed
or
a
cable
is
not
making
a
good
connection.
E8
–
inadequate
coolant
warnings:
inadequate
coolant,
water
temperature
The
sensor
on
the
heat
exchanger
is
reading
a
temperature
above
60
°C.
Temperature
control
has
been
shut
down
to
prevent
damage
to
the
Peltier
element.
Either
the
water
was
too
warm
or
the
rate
of
flow
was
inadequate
to
draw
sufficient
heat
from
the
heat
exchanger.
