VAT 642 Series - Trouble Shooting

Series 642
TROUBLE SHOOTING
813316EB Edition 2017-11-24 81/
107
6 Trouble shooting
Failure Check Action
No dots lighted on display
24 V power supply ok?
Connect valve to power supply according to
«Electrical connection» and make sure that power
supply is working.
Remote operation does not work
- Local operation via
service port active
- Switch to remote operation.
- Safety mode active,
check for D on display?
- Provide power to motor to allow for operation.
- Refer to «Electrical connection» for details.
Display shows «
E 20
»
(fatal error - limit stop of valve unit
not detected)
- Replace actuator according to
«Maintenance procedures».
Display shows «
E 21
»
(fatal error - rotation angle of valve
plate limited – power up)
- Valve plate mechanically
obstructed?
- Resolve obstruction.
Display shows «
E 22
»
(fatal error - rotation angle of valve
plate limited
-
operation)
- Valve plate mechanically
obstructed?
- Resolve obstruction.
Display shows «
E 40
»
(fatal error - motor driver failure
detected)
- Replace control unit according to
«Maintenance procedures».
Display shows
«
D C
» or «
D999
»
Motor Interlock is open
- Motor power supplied? - Provide power to motor to allow for operation.
- Refer to «Electrical connection» for details.
Display shows «
SR
»
(Service Request)
- Valve unit heavy
contaminated or gate
seal heavily sticking?
- Clean valve and/or replace gate seal according to
«Maintenance procedures».
CLOSE VALVE does not work
- Safety mode active,
check for D on display?
- Maintenance mode active
- Provide power to motor to allow for operation.
- Refer to «Electrical connection» for details.
- Refer to “Display shows «M C»” in this table
OPEN VALVE does not work
- Safety mode active,
check for D on display?
- Maintenance mode active
- Provide power to motor to allow for operation.
- Refer to «Electrical connection» for details.
- Refer to “Display shows «M100»” in this table
Display shows «
M C
»
Maintenance mode active
- Pin 14 of service connector is connected to ground.
Plate will close. Further movement of plate is
blocked.
1)
Display shows «
M100
»
Maintenance mode active
- Pin 13 of service connector is connected to ground.
Plate will open. Further movement of plate is
blocked.
1)
POSITION CONTROL does not
work
- Safety mode active,
check for D on display?
- Provide power to motor to allow for operation.
- Refer to «Electrical connection» for details.
- POSITION CONTROL
selected, check for V on
display?
- Select POSITION CONTROL mode.
Refer to «Position control» for details.
Pressure reading is wrong
or
pressure reading is negative
- Sensor(s) connected? - Refer to «Electrical connection».
- 2 sensor version present at
valve controller?
- Check valve version on page 1. Verify configuration.
Refer to «Setup procedure».
- Refer to «Pressure control operation with 2 sensors».
- ZERO done? - Perform ZERO when base pressure is reached. Refer to
«ZERO» for details.