Go into DIAGNOSTICS menu, CONTROL OUT item. A
number between 0% OPEN and 100% OPEN will be
displayed. Pressing the key increases the number.
Pressing the key decreases the number. Change the
CONTROL OUT value to read 0% OPEN or 100% OPEN.
Note damper/valve position. Press an arrow key to
change 0% OPEN to 100% OPEN or 100% OPEN to 0%
OPEN. Note position of damper/valve. Damper should
have rotated 90 degrees (or valve linkage moved full
stroke). If damper rotated 90 degrees (or valve linkage
moved full stroke), actuator is installed and operating
correctly.
If damper/valve did not move, check that:
Damper/valve is not physically stuck (screws, etc.).
Wiring is correct between actuators and controller.
Check that voltage varies between 0 and 10 volts on
pins 5 and 6 on electric actuator (see No control
output signal).
Electric actuator is not over torqued. The electric actuator
has current limiting protection. If damper is physically
stuck or actuator is over current, the actuator will shut
down. To restart either kill power to actuator or move
damper/valve in opposite direction (CONTROL OUT
menu item).
Perform test described in Control system is not
controlling. If CONTROL OUT is functioning, verify wiring
to VFD by confirming CONTROL OUT voltage changes at
VFD. If voltage changes, a problem with VFD exists. See
VFD manual for further troubleshooting.
Control wires are loose. Check wires and verify control
output is working (see No control output signal). If control
output test passes, verify damper/valve is moving correct
direction (see Damper/Valve moving opposite direction). If
damper/valve is moving correctly and set point cannot be
reached, DIM will fully move damper/valve to get as close
to set point as possible. Fume hood exhaust; fan, static
pressure, etc. needs to be adjusted.
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