The Actuator Is Supplied With Power But Does Not Operate; Actuator Runs Erratically; Optional Equipment(S); Installation And Maintenance Tips - HKC HQ Series Installation, Operation & Maintenance Manual

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. [Make sure that the actuator output torque is greater than the valve required torque -17 Rev0]
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 operating direction against the rotation of the valve (standard units are
counter-clockwise rotation to open)
7.2.7. [Check internal wiring --- 17 rev0]
7.2.8. Check for any corrosion and condensation that any of the electrical or mechanical devices have not
been contaminated
7.2.9. 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
7.4.

Optional Equipment(s)

7.4.1. [Potentiometer --- 17 Rev0]
① Check the resistance value
② Check potentiometer gear for jamming
③ Check ZERO and SPAN calibration, [and confirm input / output signal --- 17 Rev0]
④ Check the board for any damage
7.4.2. Current Position Transmitter
① Verify the input signal
② Check the configuration of the dip switches
③ Check the board for any damage

8. Installation and Maintenance Tips

WARNING:
When working in potentially explosive areas, be sure to comply with the standard EN 60079-14 "Elec-

trical Installations in Hazardous Areas".
For cable entries that are not used, user or installer shall close by Ex db IIC certified blanking el-

ement suitable type of protection, Ex d so that type of protection of the enclosure is maintained.
Working on the actuator that is in open position and under voltage must only be performed if it is as-

sured that there is no danger of explosion for the duration of the work.
Flameproof Enclosure! Before opening, ensure the absence of any flammable gas and any electrical

power
When operation, maintenance, or installation shall be verified that O-rings are not damaged or

pinched between their parts.
CAUTION:
A regular inspection and maintenance should be performed by qualified and trained personnel

Treat cover with care. Gap surfaces must not be damaged or dirtied in any way. Do not jam the cover

during fitting.
Pay attention to national regulations

For any installation and maintenance work, the followings should be noted:
8.1.
Check the quarter turn actuators visually. Ensure that no external damage or changes are visible. The
electrical cables must not be damaged and wired correctly.
8.2.
Cable entries, cable glands, plugs, etc. have to be checked whether they are correctly tightened and
sealed.
Doc No. : HumC-HQ-21 Rev1
HQ(XC) Series Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Page 15 / 21 Valve Automation Leader HKC