HQ-004 Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Doc No. : HumG-HQ004-21 Rev0 Page 8 / 9 Valve Automation Leader, HKC
WARNING:
Treat cover with care. Gap surfaces must not be damaged or dirtied in any way.
Do not jam the cover during fitting.
6.2. Tools
6.2.1. Metric Allen Key (Hex Wrench) × 1
6.2.2. Screw Driver × 1
6.2.3. Metric Spanner × 1
6.2.4. Wrench 200mm × 1
6.2.5. Wrench 300mm × 1
6.2.6. Wire Stripper Long Nose × 1
6.2.7. Multi-meter (Ac, Dc, Resistance) × 1
7. Trouble Shooting
The following instructions are listed in the order of the most common difficulties encountered during
the installation and start-up.
7.1. The actuator does not respond
7.1.1. Visually inspect the actuator to check no shipping or handling damage has occurred
7.1.2. Verify the line voltage supplied to the actuator; check that the line voltage matches with
the rating on the actuator’s nameplate
7.1.3. Check the internal wiring against the supplied wiring diagram of the actuator
7.1.4. Check the limit switch cams
7.2. The actuator is supplied with power but does not operate
7.2.1. Verify the line voltage supplied to the actuator; check that the line voltage matches with
the rating on the actuator’s nameplate.
7.2.2. Check that the actuator torque is greater than the valve torque
7.2.3. Check the limit switch cams
7.2.4. Check that the torque switches have not been tripped
7.2.5. Check the mechanical travel stop adjustment
7.2.6. Verify that the actuator against the rotation of the valve (standard units are counter-
clockwise rotation to open)
7.2.7. Check for any corrosion and condensation that any of the electrical or mechanical devices
have not been contaminated
7.2.8. Verify that coupler/bracket is correctly installed and is not causing any binding
7.3. Actuator runs erratically
7.3.1. Check the ambient temperature
7.3.2. Verify that the duty cycle has not been exceeded
7.3.3. Check the position of manual override lever
Motor will not run
Open in control circuit
Refer to appropriate wiring diagram and
check for continuity
Insulation resistance breakdown
in motor
Perform megger Test
No power available to actuator
Tripped circuit breaker Reset circuit breaker
Manual Override Nut hard to
turn
Valve stem improperly lubricated
Lubricate with grease
Clean out old grease and replace with
recommended lubricant
Actuator lubrication has broken
down
Valve packing gland too tight Loosen packing gland nuts as necessary
Jammed valve Refer to valve maintenance
Valve only opens or closes
partially with motor
Limit switch improperly set Check setting and reset if necessary
Manual Override Nut will not
operate valve
Stripped gearing Replace as necessary
Broken hand wheel shaft Replace as necessary
Broken valve stem Repair or replace as necessary
Motor runs but will not operate
valve
Stripped gearing Replace as necessary
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