HKC HQ-006, Installation, Operation & Maintenance Manual, Page: 12 / 22

HQ-006 Quarter-turn Electric Actuator
Installation Operation& Maintenance Manual
Doc No. : HumA-HQ006-21 Rev1 Page 12 / 22 Valve Automation Leader, HKC
③ Adjustable setting range : (16 steps available)

Step 0~4 : increase 0.1% increment per step
(0.3 ~ 0.7 % for PCU-EB-V1.5D ac)
(0.4 ~ 0.8 % for PCU-DC-V2.1C dc)

Step 5~9 : increase 0.2% increment per step (1.0% ~ 1.8%)

Step A~F : increase 0.5% increment per step (5.0% ~ 7.5%)

Initial setting is “4”
④ If the setting value is too low, the actuator may not be found the target point and it may be
repeatedly operated in forward or reverse direction. This is called “Hunting” and the user must
appropriately adjust the deadband to avoid from the hunting.
⑤ Continuous hunting causes a failure of the actuator parts such as motor, PCU board, potentiometer
and etc.
4.6.6. Deadtime setting
① This is necessary to apply the command signal.
② It is the minimum time for maintaining the state of the input signal satisfying the deadband.
③ Actuator only accepts input signal satisfying the setting value of the deadtime as normal and
operates. It is for preventing from abnormal operation of the actuator by external disturbance such
as noise.
④ Adjustable setting range : 0.2~7.5 sec (16 steps available)

Step 0 : 0.2 sec (minimum value)

Step 1~4 : increase 0.25 sec increment per step (0.25~1 sec)

Step 5~F : increase 0.50 sec increment per step (2.5~7.5 sec)

Initial setting is “4”
4.6.7. Auto setting
① Check connection status of the input power and input/output signal after actuator and valve are
correctly assembled.
② If there is no problem with the wiring, push the auto setting button once (ASCAN).
③ Then the LED lights on the PCU board will be flickering and perform the auto setting function.
④ Auto setting details
② Blue LED will be continuously flickering.
③ Green LED will be flickering while closing and it will be ‘ON’ after fully closed.
If the actuator is already in closed position, the closing operation will be skipped.
④ Red LED will be flickering while opening and it will be ‘ON’ after fully opened.
⑤ Green LED will be flickering while closing and it will be ‘ON’ after fully closed.