13
Installation Guide
Bettis Q-Series
DOC.IG.BQC44.1 Rev. 1
February 2017
6 Trouble shooting
6.1 The “Open” and “Closed” position
feedback signals are reversed from the
actual valve positions.
1 Check if the actuator is correctly mounted to the
valve.
Before mounting the actuator on the valve, the
actuator and the valve should have the same
“open” or ‘closed” position (see Installation
& Operation Manual Bettis Q-Series Valve
Actuator DOC.IOM.Q.E).
2 Some valves may be operated in such a way that
they are:
- “Open” after a clock wise rotation and
- “Closed” after a clock wise rotation.
3 Please see § 5.2 for setting the “Open” and
“Closed” position feedback signals
6.2 The actuator does not give (good) position
feedback signals.
1 Check if the actuator is correctly mounted to the
valve.
2 Re-adjust the limit switch setting as per chapter
5.3
6.3 Factory setting of the switch points.
IMPORTANT
The procedure below assumes:
- That the actuator / valve assembly is closed
after a clock wise rotation (see also
§
5.1).
- The control module is pneumatically and
electrically connected according chapter 3 and 4.
This procedure sets the switch point settings of the
switches, back to the factory settings (±15° before
each end of stroke), assuming a mechanical stroke
of 90°±0.5° of the actuator.
To set and detect the switch point, use a multi me-
ter, connected to the switch terminals, to measure a
resistance change as applicable per switch type (see
applicable wiring diagram in chapter 4.2).
For the proximity switches, you can use a proximity
switch tester.
5.4 Check operation
5.4.1 Default (single) pilot valve
1 Connect pressure according chapter 3 and a
control signal to terminals (7) 8 and 9 according
§ 4.1 figure 4.3.
2 Actuator moves to “Open” position. “Open”
limit switch is activated and “Close” limit switch
is deactivated.
3 Remove voltage from terminals 9 and 8.
4 Actuator moves to “Close” position. “Close”
limit switch is activated and “Open” limit switch
is deactivated.
6 Mount the cover to the Control Module
(see fig. 4.1).
5.4.2 Dual pilot valve (Fail in Last Position)
operation
1. Connect pressure according chapter 3 and a
control signal to terminals (7) 8 and 9 according
§ 4.1 figure 4.4.
2. Actuator moves to “Open” position. “Open”
limit switch is activated and “Close” limit switch
is deactivated.
3. Remove voltage from terminals 9 and 8.
4. Actuator Stays in the “Open” position.
5. Connect pressure according chapter 3 and
a control signal to terminals (10) 11 and 12
according § 4.1 figure 4.4.
6. Actuator moves to “Closed” position. “Close”
limit switch is activated and “Open” limit switch
is deactivated.
7. Remove voltage from terminals 9 and 8.
8. Actuator Stays in the “Closed” position.
9. Mount the cover to the Control Module
(see fig. 4.1).
