Ransburg MMA-570 Direct_Ind Charge Atomizer A13366 - Manual (Page 76)

TROUBLESHOOTING GUIDE - INDIRECT CHARGE
Bell cup damaged
Low voltage
Paint lodged in shaping air ring
High current draw
MicroPak controller cascade
Improperly mounted air turbine
Faulty low voltage connections
(usually indicated by MicroPak
feedback fault light)
Faulty high voltage connection
MicroPak or cascade failure
MicroPak settings not correct
Damaged high voltage cable
Dielectric breakdown of high volt-
age parts
Improper color change (i.e., paint
or solvent in dump line)
Low or no high voltage
Poor grounding of parts being
coated
General Problem Possible Cause Solution
Bad Spray Pattern
Low or No High
Voltage
Replace bell cup.
See “Low or No High Voltage” below.
Disassemble and clean (see “Mainte-
nance” section).
Check resistance of electrodes.
Inspect low voltage at the MicroPak and
the cascade.
a. Faulty low voltage cable.
Verify ground connection of air turbine to
earth ground at less than 1 megohm.
a. Make sure quick disconnection electri-
cal connection is aligned and clean.
b. Check low voltage connection at
cascade.
Verify that high voltage cable is fully
seated in the cascade and the high
voltage ring.
Refer to current MicroPak manual for
detailed Troubleshooting Guide.
Refer to current “MicroPak” manual for
detailed “Troubleshooting Guide.”
Remove and inspect/measure resis-
tance.
Check cascade, high voltage ring, and
high voltage cable. Replace defective
parts.
Optimize color change.
Verify high voltage at electrodes. Nor-
mally, a high voltage setting of 30-70 kV
is appropriate for most applications.
Verify that parts being coated are prop-
erly grounded (the electrical resistance
between the part and ground must not
exceed 1 megohm).
Low Transfer
Efficiency (or light
coverage)
MMA-570 Direct/Indirect Charge - Maintenance
Ransburg
LN-9279-13 73