Martin Christ Alpha 1-2 LDplus User Manual

Page 52

Freeze-dryer Alpha 1-2 LDplus

7 Malfunctions and error correction

Version 11/2006, Rev. 2.0 of 02/12/2014 • sb

Translation of the original operating manual

7.1.2.3 Pressure control valve

A malfunction of the pressure control valve may have several causes.

NOTE

The inspection of the valve must be carried out by qualified specialist
personnel (see chapter 7.3 - "Service contact").

Pos: 151 /01 0 Univ ersal mod ule/Seit enwec hsel @ 0\m od_ 120 211 624 4312 _0. docx @ 10 5 @ @ 1

Pos: 152 /20 0 Ch rist/3 60 G T-BA L abo r-Pilot (STANDARDMODU LE)/0 70 Stö run gen und Fe hlers uche /07 0-0 010 -00 20- 0030 G ummiv entile @ 2 5\m od_1 404 984 064 588 _68. docx @ 18 422 3 @ 4 @ 1

7.1.2.4 Rubber valves

In order to identify a leaking rubber valve, the valves must be checked
individually:
• Remove the rubber valve and seal the connection at the drying

chamber with a rubber stopper.

• Check the tightness under vacuum until the leaking valve has been

localised.

• Clean the valve or replace it if necessary.

Pos: 153 /01 0 Univ ersal mod ule/L eerz eile @ 0\m od_ 120 211 624 450 0_0. docx @ 11 4 @ @ 1

Pos: 154 /20 0 Ch rist/3 60 G T-BA L abo r-Pilot (STANDARDMODU LE)/0 70 Stö run gen und Fe hlers uche /07 0-0 010 -00 20- 0040 Vaku um messs ond e @ 2 5\m od_ 140 498 4065 691 _68 .docx @ 18 423 7 @ 4 @ 1

7.1.2.5 Vacuum sensor

Vacuum sensors have a limited service life and can be ordered as spare
parts (e.g. VSP62/63, order no. 125468).
Functional test:
• Connect the vacuum sensor directly to the suction side connector of the

vacuum pump.

If a final pressure of at least 0.011 mbar is reached (with a vacuum pump
that has reached its operating temperature), the sensor and the vacuum
pump are OK.

Pos: 155 /01 0 Univ ersal mod ule/L eerz eile @ 0\m od_ 120 211 624 450 0_0. docx @ 11 4 @ @ 1

Pos: 156 /20 0 Ch rist/3 60 G T-BA L abo r-Pilot (STANDARDMODU LE)/0 70 Stö run gen und Fe hlers uche /07 0-0 010 -00 30 Eisko nde nsat orte mp erat ur Alp ha bis Delta @ 2 5\mo d_1 404 984 066 757 _68. docx @ 18 425 1 @ 3 @ 1