39
The motor was manually moved
while the position sensor was not
powered.
The motor brake is not working
properly
The position sensor’s EEPROM
memory has failed
The photochopper is misaligned
with the slotted optocouplers
The photochopper is positioned too
low on the motor shaft.
A motor bearing has failed
There is a loose connection in the
screw terminal blocks
There is a loose or dirty connection
in the yellow Turck cable
The position sensor has failed
There is a broken motor lead or
winding
The thermal switch has tripped be-
cause the motor is overheated
Any of the reasons listed in “The
motor operates in one direction
only”
The command shaft is jammed
Broken gears in the gearmotor
Motor is overheating and the ther-
mal switch is tripping
Recalibrate.
Get the motor brake to where it op-
erates freely and then recalibrate.
Replace the actuator.
Try to realign or replace the ac-
tuator.
Adjust the photochopper so that
the fence extends further into the
optocoupler slots.
Replace the actuator.
Tighten.
Clean and tighten.
Replace the actuator.
Replace the actuator.
The motor will resume operation
when it cools. This could be caused
by a malfunctioning control panel.
Consult the factory.
See above.
Free the command shaft.
Replace the actuator.
This could be caused by a malfunc-
tioning control panel. Consult the
factory.
Slide Valve Actuator Troubleshooting Guide
The actuator does not transmit
the correct position after a power
loss
There is a rapid clicking noise
when the motor is operating
The motor operates in one direc-
tion only
The motor will not move in ei-
ther direction
The motor runs intermittently,
several minutes on, several min-
utes off
Summary of Contents for VSM 71-701
Page 1: ...1 VPN 35391S February 2006 Rev 05 Price 60 00...
Page 2: ...2...
Page 20: ...20...
Page 52: ...53 Pre Start Up Check List...
Page 99: ...99 Recommended Spare Parts List...
Page 104: ...104 Gate Rotor...
Page 110: ...110 Main Rotor VSS...
Page 112: ...112 Main Rotor VSR...
Page 114: ...114 Slide Valve Cross Shafts and End Plate...
Page 118: ...118 Capacity Slide Volume Slide Carriage Assembly Slide Valve Carriage Assembly...
Page 134: ...134 Miscellaneous Frame Components VSS Screw Compressor VSR Mini Screw Compressor...
Page 138: ...138 C FlangeAdapter Components 630 620 610 640 601 641 630 601 620 610 640 641 642 650 651...
Page 140: ...140 Replacement Parts Tools...
Page 144: ...144 GaterotorAssembly...
Page 148: ...148 Main Rotor Slide Valve Cross Shafts and End Plate Models 71 401 Only Counter clockwise...
Page 152: ...152 Main Rotor Slide Valve Cross Shafts and End Plate Model 501 701 Only Clockwise...
Page 154: ...154 Volume Ratio Capacity Slide Carriage Assembly Slide Valve Carriage Assembly...
Page 158: ...158 Miscellaneous Frame Components Model VSM 501 701 Model VSM 71 401...
Page 160: ...160 Replacement Parts Accessories Housing Accessories C Flange Assembly...
Page 166: ...166 Haight Pumps...
Page 170: ...3 Refrigerating Specialties Division...
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Page 237: ......
Page 238: ......
Page 243: ......
Page 244: ...168...