Nordson Compact Manual Iso-Flo Voltage-Block, Manual

Page: 54 / 76

Troubleshooting
5-2
E 1995 Nordson Corporation
All rights reserved
108 390A
Issued 10/95
Manual 10-10
The following table provides general information for troubleshooting the
Iso-Flo unit.
Problem Possible Cause Corrective Action
1. Coating material does not
flow when spray device is
triggered
System air pressure is too low Check and adjust system air pressure to
a minimum of 80 psi (5.5 bar).
Fluid hose from the Iso-Flo pump to
the spray device is clogged, or the
fluid hose from the shuttle to the
Iso-Flo pump is clogged
Check for blockage in fluid hose. Clean
or replace fluid hose(s), as needed.
Hose or filter ahead of Iso-Flo system
is clogged
Check for blockage in the input hose,
the filter, or both. Clean or replace, as
needed.
Spray device is clogged Check spray device.
2. Coating material flow is
poor or erratic
Spray device flow control valve is
almost or all the way closed. (Applies
only to spray devices with integral
flow control valve.)
Open the spray device valve.
System air pressure is too low to
operate pump
Adjust system air pressure to as high as
possible. (80 − 150 psi or 5.5 − 10.3 bar).
Fluid hose from the pump to the
spray device is blocked
Adjust fluid output pressure. If fluid
output pressure is not the problem,
clean or replace fluid hose.
3. Coating material is thin or
watery at start-up
System is not completely purged of
cleaning solution
Turn off electrostatic voltage, open
cabinet door, and trigger the spray
device. Continue spraying until the
pump empties completely. If necessary,
increase system air pressure.
4. No electrostatic voltage,
or the electrostatic
voltage is low or erratic
Water in compressed air is making
the air lines conductive
Filter and dry air before it enters the
Iso-Flo system.
Coating material hose is grounding
out
Inspect hose and repair or replace, as
necessary.
Defective electrostatic power supply,
electrostatic cable, cable connection,
or control circuit
Check electrical equipment and repair or
replace, as necessary.
System is grounding out because
door valve is not actuated
Make sure the door closes tightly. If
necessary, adjust the door valve.
2. Troubleshooting
Procedures