VAT PM-4 User Manual

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ISO 9001
EN 29001
Installation, Operating, and Maintenance Instructions
Series 64.1
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
225590EE
2005-04-26
7/16
5 Spare Parts / Retrofit Options
Description Ordering No.
Preventive maintenance kit for PM controller with power-fail option, consisting of: SRAM, battery pack, label 86705-R1
Preventive maintenance kit for PM controller without power-fail option, consisting of: SRAM, label 86706-R1
Battery pack for power-fail option, for retrofit 67786-R1
LOGIC interface 207806
RS232C interface 75944-R1
Service Box for PM-4 600BS-29NN
6 Trouble Shooting
Problem Recommendation
Front panel:
LED’s and LCD display inactive
- Check, if mains switch is on, mains cable is connected, mains supply is on
- Check fuses at rear panel of PM controller
Control does not respond to keyboard
commands
- Control in REMOTE, switch PM controller to LOCAL
No or weak text on LCD display
- Adjust brightness; «F1» & «F2» & «↑» key
‘PAR:ER’ or flashing ‘P’ displayed - New auto learning should be performed
- If error occurs after new auto learning and
power disruption, replace battery powered
SRAM memory
‘ROM:ER’ displayed - EPROM defective, to be changed
LED on «CLOSE» key is flashing, valve
is closed and does not respond to RS 232
or keyboard commands
- Logic CLOSE input on RS 232 interface is active
Pressure reading is wrong
Negative pressure reading
- Confirm that sensor setup is correct, press «LEARN» & «ZERO»
- When base vacuum is reached and pressure reading is off, perform ZERO command
ZERO command does not work - Valve is not in open position, OPEN valve and bring chamber to high vacuum
- ZERO command is disabled, check sensor setup («LEARN» & «ZERO»)
Display not ‘0’ after ZERO command - Sensor offset voltage is larger than ±1.4V
- System not pumped to base pressure
Pressure control not optimal after LEARN
command
- 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
Valve open or in control mode
‘E’ displayed on front panel
- 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

VAT PM-4 Specifications

General

Brand	VAT
Model	PM-4
Category	Controller
Language	English