Ransburg MMA-303 Direct_Ind Charge Atomizer A12870 - Manual (Page 97)

MMA-303 Direct/Indirect Charge - Maintenance
LN-9269-11.3 94
TROUBLESHOOTING GUIDE—INDIRECT CHARGE
General Problem Possible Causes Corrective Action
Bad Spray Pattern 1. Bell cup damaged
2. Low voltage
3. Paint lodged in shaping air
ring
1. Replace bell cup.
2. See "Low or No High Voltage" below.
3. Disassemble and clean (see
"Maintenance" section).
Low or No High
Voltage
1. High current draw
2. MicroPak controller cascade
3. Improperly mounted air turbine
4. Faulty low voltage connections
(usually indicated by MicroPak
feedback fault light)
5. Faulty high voltage connection
6. MicroPak or cascade failure
7. MicroPak settings not correct
8. Damaged high voltage cable
9. Dielectric breakdown of high
voltage parts
10. Improper color change (i.e.,
paint or solvent in dump line)
1. Check resistance of electrodes.
2. Inspect low voltage at the MicroPak and
the cascade.
a. Faulty low voltage cable.
3. Verify ground connection of air turbine to
earth ground at less than 1 megohm.
4. a. Make sure quick disconnection electri-
cal connection is aligned and clean.
b. Check low voltage connection at cascade.
5. Verify that high voltage cable is fully seat-
ed in the cascade and the high voltage ring.
6. Refer to current MicroPak manual for de-
tailed Troubleshooting Guide.
7. Refer to current "MicroPak" manual for
detailed "Troubleshooting Guide."
8. Remove and inspect/measure resistance.
9. Check cascade, high voltage ring, and
high voltage cable. Replace defective parts.
10. Optimize color change.
Low Transfer
Efficiency (or
light coverage)
1. Low or no high voltage
2. Poor grounding of parts being
coated
1. Verify high voltage at electrodes. Normal-
ly, a high voltage setting of 30-70 kV is appro-
priate for most applications.
2. Verify that parts being coated are properly
grounded (the electrical resistance between
the part and ground must not exceed 1 meg-
ohm).