Spare Parts / Retrofit Options; Trouble Shooting - VAT 64.1 Series Installation, Operating And Maintenance Instructions

5

Spare Parts / Retrofit Options

Description
SRAM / SRAM battery pack, label
Battery pack for power-fail option, for retrofit
RS485C interface
Service Box for PM-4
6

Trouble Shooting

Problem
Front panel:
LED's and LCD display inactive
Control does not respond to keyboard
commands
No or weak text on LCD display
'PAR:ER' or flashing 'P' displayed
'ROM:ER' displayed
LED on «CLOSE» key is flashing, valve
is closed and does not respond to RS 485
or keyboard commands
Pressure reading is wrong
Negative pressure reading
ZERO command does not work
Display not '0' after ZERO command
Pressure control not optimal after LEARN
command
Valve open or in control mode
'E' displayed on front panel
VAT Vakuumventile AG, CH-9469 Haag, Schweiz
Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email reception@vat.ch http://www.vatvalve.com
Installation, Operating, and Maintenance Instructions
ISO 9001
EN 29001
Series 64.1
Recommendation
- Check, if mains switch is on, mains cable is connected, mains supply is on
- Check fuses at rear panel of PM controller
- Control in REMOTE, switch PM controller to LOCAL
- Adjust brightness; «F1» & «F2» & «↑» key
- New auto learning should be performed
- If error occurs after new auto learning and power disruption, replace battery powered
SRAM memory
- EPROM defective, to be changed
- Logic CLOSE input on RS 485 interface is active
- Confirm that sensor setup is correct, press «LEARN» & «ZERO»
- When base vacuum is reached and pressure reading is off, perform ZERO command
- Valve is not in open position, OPEN valve and bring chamber to high vacuum
- ZERO command is disabled, check sensor setup («LEARN» & «ZERO»)
- Sensor offset voltage is larger than ±1.4V
- System not pumped to base pressure
- The PM controller reoptimizes the parameters for each set point, repeat pressure
control command after adaption is completed
- ZERO command was not performed before LEARN command
- LEARN command was performed with different gas flow, repeat LEARN sequence
- Make sure sensor range is suited for application (>3% of f.s.)
- Noise on sensor signal, check sensor voltage, make sure a shielded sensor cable is
used
- Pendulum plate does not reach end position because of mechanical obstruction.
- Check valve installation (torque on valve flange mounting screws too high, see
Installation and Operating Instruction for valve!). Check and clean valve
Ordering No.
see above
324532
207806
600BS-29NN
283681EB
11/19
2011-03-18