Emerson Branson M1800 Instruction Manual page 70

Table 7.2
Problem
Err on actual
temp and alarm
Icon is on.
Sonics and
Degas operate.
Auto and Heat
are inactive.
Unit operates
but display does
not function.
Unit stops
operating and
display is blank
with only alarm
icon on.
Decreased
ultrasonic
activity.
NOTICE
Refer to 7.3
Glass Slide Test
for cavitation
check.
66
Troubleshooting
Cause
Malfunctioning sensor
components.
CPX/CPXH - Control board
malfunctioning.
Overheat condition.
Solution is not degassed.
Solution is spent
Solution level is incorrect for
load.
Tank bottom is covered with soil
particles.
Using deionized water in the
tank.
What to do
Call nearest authorized service
center.
Call nearest authorized service
center.
For CPXH units, if temperature of
75º C is reached, ultrasonics will
stop and won't resume until
temperature falls back to 69º C.
Check solution level. Refer to
Temperature for information on
over temperature protection.
Make sure that tank was filled
with warm tap water plus
cleaning solution and has run 5-
10 minutes.
Change solution.
Adjust solution to within 3/8 inch
(1 cm) of the tank's operating
level line with load.
Empty, then clean tank with
warm water. Wipe with a
nonabrasive cloth.
Deionized water does not
cavitate as actively as soapy tap
water.
100-214-294 REV. 05
4.3