Pfeiffer Vacuum MVP 015-2 User manual

Betriebsanleitung • Operating Instructions
PU 0012 BE/E (0910)
Diaphragm Pump
MVP 015-2
Translation of the Original Operating Instructions

2
Table of contents
Table of contents
1 About this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Proper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Product identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1 Setting up the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Connecting the vacuum side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.3 Connecting the exhaust side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.4 Connecting to the mains power supply . . . . . . . . . . . . . . . . . . . . . . . 9
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Before switching on the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Switching on the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.3 Pumping condensable vapours. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.4 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.1 Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Cleaning and replacing diaphragm and valves . . . . . . . . . . . . . . . . 14
7.3 Cleaning the gas ballast valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.4 Replacing the device fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1 Shutting down for longer periods. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9 Malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.1 Rectifying malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
10 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
12 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
13 Technical data and dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . 22
13.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
13.2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
13.3 Substances in contact with the media. . . . . . . . . . . . . . . . . . . . . . . 22
13.4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3
About this manual
1 About this manual
1.1 Validity
This operating manual is for customers of Pfeiffer Vacuum. It describes the func-
tioning of the designated product and provides the most important information for
safe use of the unit. The description follows applicable EU guidelines. All informa-
tion provided in this operating manual refer to the current state of the product's de-
velopment. The documentation remains valid as long as the customer does not
make any changes to the product.
Up-to-date operating instructions can also be downloaded from
www.pfeiffer-vacuum.net.
Applicable docu-
ments
*also available via www.pfeiffer-vacuum.net
For information about other certifications, if applicable, please see the signet on
the product or:
• www.tuvdotcom.com
• TUVdotCOM-ID 0000021320
1.2 Conventions
Safety instructions The safety instructions in Pfeiffer Vacuum operating manuals are the result of risk
evaluations and hazard analyses and are oriented on international certification
standards as specified by UL, CSA, ANSI Z-535, SEMI S1, ISO 3864 and DIN 4844.
In this document, the following hazard levels and information are considered:
MVP 015-2 Operating instructions
Safety information for vacuum pumps "Safety Guide" PT 0300 BN*
Declaration of Conformity Part of this document
Operating instructions for accessories (order-specifically) see section "accessories"*
DANGER
Immediate danger
Death or very severe injuries can occur.
WARNING
Possible danger
Injuries or severe property damages can occur.
CAUTION
Possible danger
Injuries or property damages can occur.
NOTE
Command or note
Command to perform an action or information about properties, the disregarding of
which may result in damage to the product.

4
Safety
Pictograph
definitions
Instructions in the
text
Work instruction: here you have to do something.
Symbols used The following symbols are used consistently throughout in all illustrations:
Vacuum connection
Exhaust
Gas ballast valve
Power connection
2Safety
2.1 Safety precautions
• Before pumping dangerous, corrosive or environmentally hazardous media,
take suitable precautions:
– Test the compatibility with substances in contact with the media.
– Prevent the release of process gases and their reaction products and by-prod-
ucts or dispose of them according to the relevant regulations.
– Safety measures (e.g. wearing protective clothing and safety goggles) to pre-
vent inhalation and skin contact.
Prohibition of an action or activity in connection with a
source of danger, the disregarding of which may result in
serious accidents.
Warning of a displayed source of danger in connection
with operation of the unit or equipment.
Command to perform an action or task associated with a
source of danger, the disregarding of which may result in
serious accidents.
V
G
NOTE
Duty to inform
Each person involved in the installation, operation or maintenance of the vacuum pump
must read and observe the safety-related parts of these operating instructions.
The operator is obligated to make operating personnel aware of dangers originating
from the vacuum pump, the pumped medium and the entire system.
NOTE
Installation and operation of accessories
Pfeiffer Vacuum pumps can be equipped with a series of adapted accessories. The in-
stallation, operation and maintenance of connected devices are described in detail in
the operating instructions of the individual components.
For information on order numbers of components, see "Accessories".
Use original accessory parts only.

5
Safety
• Before pumping gases which could form ignitable mixtures, take suitable pre-
cautions:
– By implementing the required safety measures, prevent potentially explosive
mixtures from occurring in the housing and from being ignited in the event of
a diaphragm crack by mechanically produced sparks, hot surfaces or static
electricity.
– If necessary, use inert gas for gas ballast supply or ventilation.
• Connect the vacuum pump to a shockproof socket only.
– Use only undamaged network cables which comply with the regulations.
– Make sure that the grounding is sufficient.
• Do not expose any body parts to the vacuum.
• Observe the safety and accident prevention regulations.
• Check regularly that all safety precautions are being complied with.
• Do not carry out any unauthorised modifications or conversions to the pumps.
• Depending on the operating and ambient conditions, the surface temperature of
the pumps may rise above 70 °C. Use suitable finger guards if necessary.
• When returning the pumps to us please note the instructions in the Service sec-
tion.
2.2 Proper use
• The vacuum pump may only be used to generate a vacuum.
• Installation, operating and maintenance regulations must be complied with.
• Other accessories than those described in this manual must not be used without
the agreement of Pfeiffer Vacuum.
• When pumping gases which could form explosive or ignitable mixtures, take
suitable precautions:
– If necessary, connect inert gas for ventilation or gas ballast supply.
2.3 Improper use
Improper use will cause all claims for liability and guarantees to be forfeited. Im-
proper use is deemed to be all use for purposes deviating from those mentioned
above, especially:
• Pumping of corrosive gases (exception: pumps in C version).
• Pumping of explosive media.
• Operation of the pump in potentially explosive areas.
• Pumping of gases containing impurities such as particles, dusts and condensate;
note the vapour compatibility levels of the pump.
• Pumping of substances that tend to sublime.
• Use of the vacuum pump to generate pressure.
• Pumping of liquids.
• Connection to pumps or units which are not suitable for this purpose according
to their operating instructions.
• Connection to units which have exposed voltage-carrying parts.
NOTE
CE conformity
The manufacturer's declaration of conformity becomes invalid if the operator modifies
the original product or installs additional components.
Following installation into a plant and before commissioning, the operator must
check the entire system for compliance with the valid EU directives and reassess it
accordingly.

6
Transport and storage
Improper use of the equipment automatically invalidates all warranty and liability
claims.
3 Transport and storage
3.1 Transport
Lift pump by hand at both face sides.
– Do not use the hose connection on the top side of the pump to carry the
pump.
3.2 Storage
Check that all the openings on the pump are securely closed.
Store the pump in a cool, dry place; preferably at room temperatures (approx.
20°C).
– For a longer period of storage, seal the pump in a PE bag with drying agents
enclosed.

7
Product description
4 Product description
4.1 Product identification
To correctly identify the product when communicating with Pfeiffer Vacuum, al-
ways have the information from the rating plate available.
• Pump model and model number
• Serial number
• Date of manufacture
Scope of delivery • Pump with drive unit
• Mains connection (switchable)
• Silencer
• G 1/8" elbow union + enclosed hose DN 6 x 1000 mm with a straight union in G
1/4" at the end
• Operating instructions
4.2 Function
The diaphragm vacuum pump of the series MVP 015-2 is a two stage, dry compres-
sor vacuum pump. The pumps are positive displacement pumps with a periodic
change of size of the suction chamber produced by the movement of the dia-
phragm. The gas flow causes the valves to open and close automatically. The
pump units are directly connected to the drive motor.
Abb. 1: MVP 015-2
A Diaphragm head 1
B Diaphragm head 2
1 Vacuum connection
2 Exhaust with silencer
10 Hose connection
13.1 Mains switch
13.2 Mains connection
with retaining clip
40 Gas ballast valve
48 Hollow screw
48.1 Hollow screw for gas
ballast valve
U Voltage selector switch
2
40 U
13.1 13.2
B10
48
1A
48.1

8
Installation
5 Installation
5.1 Setting up the pump
Observe the following requirements when setting up the pump:
Always place the pump on a firm, even surface.
– Where stationary installation is involved, anchor the pump on site.
Consider the load-bearing capacity of the installation site.
When installing the pump in a closed housing, ensure there is sufficient air cir-
culation.
– Voltage and frequency information given on the motor rating plate must be
visible.
– Keep the ventilation openings at the motor free, in order to provide sufficient
cooling air.
Installation
conditions
The pump MVP 015-2 must be installed and operated under the following ambient
conditions:
5.2 Connecting the vacuum side
Remove locking cap on intake connection and connect vacuum pump to the ap-
paratus.
The connection between the pump and the recipient should be kept as short as
possible.
– Depending on the pump type, use metallic hoses or PVC hoses with flange
connections.
– Separators, filters etc. may be installed upstream to protect the pump (see ac-
cessories). However, please observe the loss of pumping capacity due to the
conductivity of the accessories.
5.3 Connecting the exhaust side
Assemble silencer at the diaphragm head 2;
– alternatively connect exhaust line.
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the vacuum pump's exhaust connection.
Installation location weather protected (indoors)
Protection category IP 20
Installation altitude Max. 2000 m above m.s.l., if vacuum pump is installed
above 1000 m above mean sea level check compatibillity
with applicable safety requirements, e.g. DIN EN 61010
(motor may overheat due to insufficient cooling).
Ambient temperature 12-40 °C
Relative humidity 80 % at T ≤31 °C, up to max. 50% at T ≤40 °C
Degree of pollution 2
Overvoltage category II
CAUTION
High pressure in the exhaust line!
Danger of damage to the seals and danger of the pump bursting.
Install the line without shut-off valves on the exhaust side.
Pumpe nicht mit Überdruck am Einlass betreiben; max. zulässige Drücke und Druck-
differenzen beachten.

9
Installation
Lay piping from the pump sloping downward so that no condensate can flow
back into the pump; otherwise fit a condensate separator.
– If an air trap is created in the system, then a device for draining condensation
water must be provided at the lowest point.
5.4 Connecting to the mains power supply
The pump is driven by single-phase extended voltage range motors with revers-
ible voltage ranges.
WARNING
Emission of toxic substances from the exhaust!
Danger of poisoning from emitted gases or vapours, which can be detrimental to health
and/or can pollute the environment, depending on the particular application.
Comply with the applicable regulations when working with toxic substances.
Only officially approved filter systems may be used to separate and remove these
substances.
CAUTION
Excess voltage!
Danger of destroying the motor.
Power connections must comply with local regulations. Voltage and frequency infor-
mation given on the motor rating plate must correspond to the mains voltage and
frequency values.
To protect the motor and supply cable in case of malfunction, mains fuse protection
must be implemented.

10
Installation
Single phase motors The mains voltage must be determined on-site each time before the pump is in-
stalled or moved to a different location.
Changing the voltage range
Disconnect the pump from the power supply.
Set the desired voltage range on the voltage selector switch using a suitable
screwdriver.
Motor protection
A self-locking thermal winding protector switches off the pump motor in the event
of overheating (> 95°C).
Allow the pump to cool off several minutes.
– Pump runs-up automatically after cooling off.
NOTE
Overvoltage!
An incorrect voltage range setting can damage the motor.
Disconnect the pump from the power supply.
Only change the voltage range when the pump is disconnected from the power
mains.
Switch position: "115" "230"
Voltage ranges: 90-127 V, 50/60 Hz, 187-259 V, 50/60 Hz
11 5
230
11 5
230

11
Operation
6 Operation
6.1 Before switching on the pump
Compare the voltage information on the rating plate with the mains voltage.
Check that the exhaust connection allows free flow (max. permissible pressure
1.1 bar absolute).
– Activate the shut-off valves in such a way that they open before or at the same
time as the pump is started.
Protect the pump sufficiently from taking in contaminants by means of suitable
precautions (e.g. dust filters).
6.2 Switching on the pump
The pump can be switched on in any pressure range between atmospheric and
ultimate pressure.
No special precautions are necessary when pumping dry gases. In order to attain
the lowest possible final pressures, the gas ballast valve should be closed.
The pump attains the stated values for throughput rates and final pressure levels
only once the operating temperature is reached (after approximately 15 minutes).
Switch on the pump with the vacuum flange closed and allow to warm up for 15
minutes.
Intermittend opera-
tion with TC via relay
box (accessory)
To prolong the life of diaphragm pumps, intermittent operations can be selected
with lesser gas throughputs of < 0.18 mbar l/s. This means that, dependent on the
TMP power take-up, the backing pump will be switched on and off. TMP power
take-up is dependent on the fore-vacuum pressure and gas throughput.
– By comparing the power take-up with an upper and a lower limit value, the rel-
ative switch-on duration with lesser gas throughputs can be reduced to approx.
1 to 60%.
– To avoid too frequent switching on, the buffer volume in the fore-vacuum line
should amount to ≥0.5 liter from approx. 0.018 mbar l/s.
CAUTION
Dangerous overpressure overload!
Mixing up the connections leads to a dangerous overpressure overload in the pump,
and the motor could be damaged.
Before commissioning, it is imperative that you ensure that the pressure does rise
above the maximum permissible pressure on the pressure side.
Start pumps at a maximum pressure differential of 1 bar between inlet and outlet.
CAUTION
Hot surface!
Danger of burns if hot parts are touched. Depending on the operating and ambient
conditions, the surface temperature of the pump may rise above 70 °C.
In this case, use suitable finger guards.

12
Operation
6.3 Pumping condensable vapours
Should the process gases contain condensable gases present at high percentages,
the vacuum pump must be operated with a gas ballast (i.e. with an open gas ballast
valve).
Gas ballast valve Letting in gas ballast improves the discharge of condensate, and the pump
achieves the specified final vacuum more quickly.
The lower part of the valve casing has been constructed in such a way to permit the
mounting of a magnetic valve with a connection thread of G 1/8".
Abb. 2: Operation with gas ballast valve
Open gas ballast valve; to do so, slide sleeve 43 in Position "I".
6.4 Switching off
The pump can be switched off in any pressure range.
WARNING
Reactive, explosive or otherwise dangerous mixtures!
Uncontrolled gas inlet at the gas ballast valve can result in dangerous mixtures.
By implementing the required safety measures, the user must prevent potentially ex-
plosive mixtures from occurring in the inside of the pump and from being ignited in
the event of a diaphragm crack by mechanically produced sparks, hot surfaces or
static electricity.
If necessary, use inert gas for ventilation and gas ballast supply.
NOTE
Bad final vacuum and damage to the pump!
Danger of condensation and a reduced final vacuum during operation without a gas bal-
last or in case of insufficient supply of flushing gas.
Only pump vapors when the pump is warm and the gas ballast valve is open.
When the process has been completed, allow the pump to continue running for
about 30 minutes at atmospheric pressure with the gas ballast open.
40 Gas ballast valve
43 Sleeve
"I" open
"0" closed
43
"I" "0"

13
Maintenance
7 Maintenance
7.1 Precautions
The valves and the diaphragms are wear parts. If the rated ultimate vacuum is no
longer achieved, the pump interior, the diaphragms and the valves must be
cleaned and the diaphragms and valves must be checked for cracks or other dam-
age.
Depending on individual cases it may be efficient to check and clean the pump
heads on a regular basis. In case of normal wear the lifetime of the diaphragms and
valves is > 10000 operating hours.
Turn off the vacuum pump, vent to atmospheric pressure and allow to cool, if
necessary.
Disconnect the drive motor from the mains and secure it so that it cannot be
switched on.
Only dismantle the pump as far as necessary in order to repair defects.
Use only alcohol or similar agents for cleaning pump parts.
Re-assemble pump in reverse order.
WARNING
Pump parts may be contaminated from pumped media!
Danger of poisoning due to contact with harmful substances.
Decontaminate the pump before carrying out any maintenance work.
In the event of contamination, take suitable safety precautions to prevent your health
from being harmed by any dangerous substances.
NOTE
Service work should be carried out by qualified personal only!
Pfeiffer Vacuum is not liable for any damage to the pump resulting from work carried
out improperly.
Take advantage of our service training programs; additional information at www.pfe-
iffer-vacuum.net.
Please state all the information on the pump rating plate when ordering spare parts.

14
Maintenance
Checklist for inspec-
tion, maintenance
and overhaul
Certain repair and overhaul work should only be performed by Pfeiffer Vacuum
Service (PV). Pfeiffer Vacuum will be released from all warranty and liability claims
if the required intervals for inspection, maintenance, or overhaul are exceeded or
inspection, maintenance, repair or overhaul procedures are not performed proper-
ly. This also applies if replacement parts other than Pfeiffer Vacuum OEM replace-
ment parts are used.
Depending on the process, the required intervals for inspection and maintenance can exceed the
typical values specified in the table. Please consult Pfeiffer Vacuum if necessary.
7.2 Cleaning and replacing diaphragm and valves
Dismantling
Abb. 3: Replacing diaphragm and valves
Unscrew gas ballast valve 40 complete from the hollow screw 48.1; be careful
with O-ring.
Unscrew the hose connection between the pump stages by loosening the hol-
low screw with a wrench (size 14).
Place pump on the side with the diaphragm head face upwards.
Unscrew allen head screws 26 (4 pieces) from the head cover A1/B1, and remove
head cover; be careful with the sealing rings 4 and 39.
Activity daily as required; at least once every six months as required; at least annually as required; at least every 2 years
Check silencer for contamination X
Clean, change valves and diaphragms X
Change silencer X
NOTE
Damage to the pump and reduced final vacuum!
A changed dead centre (TDC) leads in the most unfavorable case to a bearing damage.
Check for washers D under diaphragm support washer.
Make sure that the original number is reassembled at the individual membrane head.
A1/B1Head cover
3 Valve plate
4 Sealing ring (at the intake side only)
5 Intermediate plate
6Diaphragm
7 Spacer disk
26 Allen head screw
26 A1/B1 39435
67

15
Maintenance
Remove intermediate plate 5; be careful with valve plate 3.
Lift the diaphragm 6 slightly on the edge and manually unscrew from the con-
necting rod (right-hand thread); be careful with spacer disk D.
Assembling Assembling is carried out in reverse order.
Clean all parts and inspect for wear.
Check bypass bore in the intermediate plate 5 of the intake side.
Exchange wear parts.
7.3 Cleaning the gas ballast valve
Gas ballast valve 40 is contaminated only, if dusty ambient air is sucked in. With
increasing contamination the air flow rate is reduced and therefore the discharge
of condensate of the pump also.
Abb. 4: Gas ballast valve 40
Unscrew gas ballast valve 40 complete from the hollow screw 48.1; be careful
with O-ring.
Insert round bar into cross-hole in valve housing 41 and screw off valve housing
from reducing piece 45.
Remove sleeve 43 from the valve housing 41.
Check the O-rings 42 and the USIT-ring 44 for damage; replace if necessary.
Unlever circular spring 49 with a small screw driver carefully out of the reducing
piece 45 and dump out circular spring 49 and filter 46.
Clean all parts and inspect for wear.
Assembling is carried out in reverse order.
Observe the bore in sleeve 43 (bore pointing upwards).
41 Valve housing
42 O-ring
43 Sleeve
44 USIT ring
45 Reducing piece
46 Filter
47 O-ring
48.1 Hollow screw
49 Circular spring
41
43
44
45
49
46
47
48.1
42

16
Maintenance
7.4 Replacing the device fuses
The microfuses (5 x 20 / 3,15A T) are located in a fuse carrier in the terminal box.
Abb. 5: Replacing the microfuses
Disconnect the drive motor from the mains and secure it so that it cannot be
switched on.
Wait for two minutes until the capacitors have discharged.
Establish the cause of the fault and rectify before restarting.
Open the terminal box lid.
Open fuse holder and replace fuses.
Remount the terminal box lid.
WARNING
Voltage-bearing elements
Danger to life from electric shock.
The fuses can be changed only by trained and authorised electricians.
Before opening the terminal box, switch off the pump and pull the power plug.
3,15AT
3,15AT

17
Decommissioning
8 Decommissioning
8.1 Shutting down for longer periods
Before shutting down the pump, observe the following procedure and adequately
protect the pump system against corrosion:
Shortly after conden-
sate has formed:
Let the vacuum pump continue to run for several minutes with the intake port
open.
Should media get into the pump which could corrode the pump materials or
form deposits, clean and check the diaphragm heads.
In the long term: Carry out the measures described for brief shutdowns.
Disconnect the pump from the equipment.
Close the manual gas ballast valve.
Close the inlet and outlet opening (e.g. with transport caps).
Store the pump in a dry place.
9 Malfunctions
Please note the following instructions should the pump malfunction:
CAUTION
Hot surface!
Danger of burns if hot parts are touched. The surface temperature of the pump may rise
above 105 °C in case of malfunction.
Carry out work on the pump only after it has cooled to a safe temperature.

18
Malfunctions
9.1 Rectifying malfunctions
Problem Possible causes Remedy
Pump will not start
up
No mains voltage or voltage
does not correspond to the mo-
tor data
Check mains voltage and mains fuse pro-
tection; check motor switch
Pump temperature too low Warm up pump to > 12°C
Thermal protection switch of the
motor has responded
Detect and fix cause of overheating; al-
low pump to cool off if necessary.
Phase failure Check fuse
Diaphragms or valves dirty Clean pump(see p. 13, chap. 7)
Overpressure in the exhaust
lead
Check exhaust lead
One of the integrated fuses is
defective
Check fuses and replace if necessary
Pump switches off
after a while after be-
ing started
Thermal protection switch of the
motor has responded
Detect and fix cause of overheating; al-
low pump to cool off if necessary.
Mains fuse protection triggered
due to overload (e.g. cold start)
Warm up pump
Exhaust pressure too high Check opening of exhaust line and ex-
haust accessories
Pump not achieving
the end pressure
Condensate in the pump Operate pump for a longer period of time
at atmospheric pressure; if necessary,
open the gas ballast valve
Gas ballast valve open Close gas ballast valve
Valves or diaphragms dirty or
defective
Clean or change valves and diaphragms
(see p. 13, chap. 7)
Leak in the system Fix leak
Pumping speed of
pump too low
Intake line not well-dimensioned Keep connections as short as possible
and see that cross-sections are sufficient-
ly dimensioned
Exhaust pressure too high Check opening of exhaust line and ex-
haust accessories
Unusual noises dur-
ing operation
Diaphragms or valves defective Clean or change valves and diaphragms
(see p. 13, chap. 7)
Suction chamber dirty Clean suction chamber
Silencer loose or missing Check silencer; replace if necessary
Valves dirty or defective Clean or change valves and diaphragms
(see p. 13, chap. 7)
Motor fan defective Replace motor fan
Connection rod or motor bear-
ing defective
Contact Pfeiffer Vacuum Service
NOTE
Service work should be carried out by qualified personal only!
Pfeiffer Vacuum is not liable for any damage to the pump resulting from work carried
out improperly.
Take advantage of our service training programs; additional information at www.pfe-
iffer-vacuum.net.
Please state all the information on the pump rating plate when ordering spare parts.

19
Service
10 Service
Pfeiffer Vacuum offers first-class service!
• Maintenance/repairs on the spot by Pfeiffer Vacuum field service
• Maintenance/repairs in the nearby service center or service point
• Fast replacement with exchange products in mint condition
• Advice on the most cost-efficient and quickest solution
Detailed information and addresses at: www.pfeiffer-vacuum.net (Service).
Maintenance and repairs in the Pfeiffer Vacuum ServiceCenter
The following steps are necessary to ensure a fast, smooth servicing process:
Download the forms "Service Request" and "Declaration on Contamination".1)
Fill in the "Service Request" form and send it by fax or e-mail to your service ad-
dress.
Include the confirmation on the service request from Pfeiffer Vacuum with your
shipment.
Fill in the contamination declaration and enclose it in the shipment (required!).
Dismantle all accessories.
Send the pump in its original packaging if at all possible.
Sending of contaminated pumps or devices
No units will be accepted if they are contaminated with micro-biological, explosive
or radioactive substances. “Hazardous substances” are substances and com-
pounds in accordance with the hazardous goods directive (current version). If
pumps are contaminated or the declaration on contamination is missing, Pfeiffer
Vacuum performs decontamination at the shipper's expense.
Neutralise the pump by flushing it with nitrogen or dry air.
Close all openings airtight.
Seal the pump or unit in suitable protective film.
Return the pump/unit only in a suitable and sturdy transport container and send
it in while following applicable transport conditions.
Service orders
All service orders are carried out exclusively according to our repair conditions for
vacuum units and components.
1) Forms under www.pfeiffer-vacuum.net

20
Spare parts
11 Spare parts
Spare part package/ Spare parts No. Pieces consisting of the parts
Set of wearing parts PU E22 001 -T 1 3, 4, 6, 14, 15, 39
Silencer P 0920 567 E 1 8
Hose connection PK 050 002 -T 1 10
Intake hose P 0991 939 1m/6x1 12
Gas ballast valve, complete PK 050 148 -U 40
Hollow screw for gas ballast valve PK 050 136 G 1/8", M6 48.1
41
43
44
45
49
46
47
48.1
42
26 A1/B1 39435
67
40
10
15
8
48.1
12/14