Tuttnauer 2540 EHS, Technician Manual

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78
Corrections
7.1 fix
leakage.
7.2
replace faulty vacuum pump/
7.3
fix leaking piping.
7.4
replace stuck non-return valve
7.5.1
Replace faulty coil and/or plunger.
7.5.2 Fix
disconnection.
7.5.3
Replace faulty board.
7.5.4
Replace faulty board.
7.5.5
See item 10.4.8.
7.5.6
See item 10.4.35.
7.5.7
See item 10.4.30.
7.5.8
See item 10.4.29
Possible cause check-up and tests
7.1
Chamber is leaking.
7.2
Faulty vacuum pump.
7.3
Vacuum piping is leaking.
7.4
Non-return valve is stuck.
7.5
Vacuum valve (52) does not open during vacuum stage due to: 7.5.1
Faulty coil or plunger.
7.5.2 Pump
disconnected.
7.5.3
Faulty digital board DIG-T2 (located in the electronic box).
7.5.4
Faulty analogue board ANL-T2 (located in the electronic box).
7.5.5
Air inlet valve (43) leaks or is stuck open.
7.5.6
Fast exhaust valve (73) leaks or is stuck open.
7.5.7
Slow exhaust valve (74) leaks or is stuck open.
7.5.8
Steam valve (93) leaks or is stuck open.
10. TROUBLESHOOTING
(cont.)
10.2 Preliminary
Troubleshooting
(cont.)
Symptom
7.
“Low vacuum” is displayed.
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