DVC 5630-006 Installatie-, bedienings- en onderhoudshandleiding - Pagina 14
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Pagina afdrukken6.2 Tools
Metric Allen Key (Hex Wrench) × 1
Screw Driver × 1
Metric Spanner × 1
Wrench 200mm × 1
Wrench 300mm × 1
Wire Stripper Long Nose × 1
Multi-meter (AC, Dc, Resistance) × 1
PCU Board Option: DC Signal Generator (4 – 20mA DC) × 1
PCU & CTU Board Option: 1mA Ammeter (0 – 25mA)
7. TROUBLE SHOOTING
The following instructions are listed in the order of the most common difficulties encountered during the installation and start-up.
SYMPTOM
Motor will not run
No power available to actuator
Manual Override hand wheel hard to
turn
Valve only opens or closes partially with
motor
Manual Override hand wheel will not
operate valve
Motor runs but will not operate valve
The actuator does not respond
Visually inspect the actuator to check no shipping or handling damage has occurred
Verify the line voltage supplied to the actuator; check that the line voltage matches with the rating on the actuator's nameplate
Check the internal wiring against the supplied wiring diagram of the actuator
Check the limit switch cams
The actuator is supplied with power but does not operate
Verify the line voltage supplied to the actuator; check that the line voltage matches with the rating on the actuator's nameplate.
Check that the actuator torque is greater than the valve torque
Check the limit switch cams
Check that the torque switches have not been tripped
Check the mechanical travel stop adjustment
Verify that the actuator against the rotation of the valve (standard units are counter-clockwise rotation to open)
Check for any corrosion and condensation that any of the electrical or mechanical devices have not been contaminated
Verify that coupler/bracket is correctly installed and is not causing any binding
Actuator runs erratically
Check the ambient temperature
Verify that the duty cycle has not been exceeded
Check the position of manual override lever
Optional edquipment(s)
1) Potentiometer Current Position Transmitter
Check the resistance value
Check potentiometer gear for jamming
Check ZERO and SPAN calibration
Check the board for any damage
2) Current Position Transmitter
Verify the input signal
Check the configuration of the dip switches
Check the board for any damage
13
Know-how makes the difference
PROBABLE CAUSE
Open in control circuit
Insulation resistance breakdown in motor
Tripped circuit breaker
Valve stem improperly lubricated
Actuator lubrication has broken down
Valve packing gland too tight
Jammed valve
Limit switch improperly set
Stripped gearing
Broken hand wheel shaft
Broken valve stem
Stripped gearing
CORRECTIVE ACTION
Refer to appropriate wiring diagram and check for continuity
Reset circuit breaker
Lubricate with grease
Clean out old grease and replace with recommended lubricant
Loosen packing gland nuts as necessary
Refer to valve maintenance
Check setting and reset if necessary
Replace as necessary
Replace as necessary
Repair or replace as necessary
Replace as necessary