Troubleshooting
34
3A7467C
The blast control
switch (B) is not
engaged, but blasting
occurs.
The air supply is
inadequate.
Make sure the air compressor is capable of supplying the minimum
air flow requirements for your system. See
, page 66. Makes sure the air inlet pressure gauge
reads 100-175 psi (6,8-12 bar, 0.68-1.2 MPa). If the gauge does
not read 100-175 psi, check the air compressor for proper setup.
The main air regulator
is malfunctioning or is
stuck open.
Disassemble the main air regulator and check for obstructions.
Replace or repair parts as necessary. See
,
The electric blast
control circuit is
malfunctioning.
Unplug the hose cable at the control box. If the blast stops, inspect
the hose cable for shortened wiring. Check continuity through the
electric blast control switch (B) (the switch is normally open).
Check for continuity across connectors of the recessed plugs on
the control box (there should be no continuity). If all above items
are functional, replace the 4-way solenoid valve.
The pneumatic blast
control circuit is
malfunctioning.
Engage the emergency stop (Q). If blasting stops, check the blast
control switch (B) by disconnecting the yellow tube at the
enclosure male quick disconnect. There should be no signal air
unless you engage the control switch. If the switch is functioning,
remove the exhaust mufflers from the 4-way and check for debris,
clean ports, and replace the mufflers if necessary. If all above
items are functional, replace the 4-way solenoid valve.
While the blast control
switch (B) is engaged,
the blast air flow is
fluctuating.
The supply air
pressure is fluctuating.
Make sure the compressor meets minimum flow requirements and
is operating properly. See
more information on flow requirements.
The main air regulator
is malfunctioning or is
stuck open.
Disassemble the main air regulator and check for obstructions.
Replace or repair parts as necessary. See
,
The electric blast
control circuit is
malfunctioning.
Inspect the hose cable for damaged or shorted partially open
wiring. Check the blast control fuse and replace if necessary.
Check for loose wire connections on the recessed plugs on the
control box (P) and all external cables. Check continuity through
the electric blast control switch (B) (the switch is normally open). If
all above items are functional, replace the 4-way solenoid valve.
The pneumatic blast
control circuit is
malfunctioning.
Actuate the blast control switch (B) and check for proper spool
valve actuation in the 4-way valve. If no actuation occurs, check
the blast control switch by disconnecting the yellow tube at the
enclosure male quick disconnect and engage the control switch. If
only a little air comes from the fitting, check the twin-line hose for
damage or crimping and check the pneumatic blast control filter. If
the twin-line and filter are clean, replace the pneumatic blast
control switch. If the switch is functioning, make sure the yellow
tubing inside the control box is properly connected and clear any
obstructions. If all above items are functional, replace the 4-way
solenoid valve.
Problem
Cause
Solution
Summary of Contents for EcoQuip 2 EQ200t Elite
Page 9: ...Warnings 3A7467C 9...
Page 10: ...Component Identification 10 3A7467C Component Identification WL D WLL D 3 1 4 5 6 7 8 9 0...
Page 39: ...Repair 3A7467C 39...
Page 46: ...Parts 46 3A7467C EQ200T Parts WL F 1 Apply thread sealant to all non swivel pipe threads...
Page 48: ...Parts 48 3A7467C EQ400T Parts 1 Apply thread sealant to all non swivel pipe threads...
