Ransburg MMA-303 Direct_Ind Charge Atomizer A12870 - Manual (Page 99)

MMA-303 Direct/Indirect Charge - Maintenance
LN-9269-11.3 96
General Problem Possible Causes Corrective Action
Speed Feedback
Fault 1. Damaged fiber optic cable
between robot plate and control
panel
2. Connection at robot or bell
plate is loose
3. Fiber optic transmitter failure
4. Bad transceiver module
5. Excessive vibration
1. a. Repair or replace fiber optic cable.
b. Bad splice connection or too many splices.
Maximum three (3) splices permitted.
2. Re-install cable and tighten locking set
screw.
3. Replace fiber optic transmitter.
4. Replace transceiver module.
5. a. Check bell cup for damage
b. Check bell cup for excessive paint buildup
c. Insure bell cup is tightened properly
d. Check cup and shaft tapers for cleanliness
No Fluid Flow 1. Turbine is not rotating
2. Fluid valve does not actuate
3. Clogged fluid tube/fluid tip
4. Bad transceiver module
1. Verify rotation of turbine (the paint valve air
pilot must be interlocked with the turbine speed
feed back signal to ensure that paint does not
flow into the air bearing).
2. a. Verify that air pilot signal is present.
b. Fluid valve air pilot pressure is too low. In-
crease air pressure to 70 psig minimum.
c. Replace fluid valve.
3. Remove and inspect fluid tube or fluid tip.
4. Replace transceiver module.
Continuous Fluid
Flow
1. Fluid valve open
2. Fluid valve seat damaged or
worn
1. a. Remove air pilot signal.
b. If still open, replace fluid valve.
2. Replace fluid valve seat.
Uncontrollable
Fluid Flow 1. Insufficient back pressure to
fluid regulator
2. Fluid regulator does not con-
trol flow (system)
1. Replace fluid tip with the next smaller inner
diameter size.
2. Disassemble fluid regulator and inspect for
failed components (system).
Troubleshooting Guide — Indirect Charge (Cont.)