Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 72 / 92

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Malfunctions
11.4 The pump is running but the performance is not correct
D89 FB PH DRIVE Phase loss of FB frequency inverter Check the power supply wiring of the concerned
frequency inverter (presence of voltage on R, S
and T terminal plugs)
Check that there is no power cut-off on power-
phases upstream the frequency inverter
W90 R1 PH DRIVE Phase loss of Roots 1 frequency inverter
W91 R2 PH DRIVE Phase loss of Roots 2 frequency inverter
D92 FB RS DRIVE FB frequency inverter memory error Check the power supply wiring of the concerned
frequency inverter (presence of voltage on R, S
and T terminal plugs)
Check that there is no power cut-off on power-
phases upstream the frequency inverter
W93 R1 RS DRIVE Roots 1 frequency inverter memory error
W94 R2 RS DRIVE Roots 2 frequency inverter memory error
W95/D95 R1 SPEED Roots 1: absence of speed information Check the cable or sensor on Li4 (see 15.4) .
W102/D102 R1 OIL T°
W102 T° Roots 1 > setpoint T
+ 5°C)
Cooling problem Check the water cooling supply on the pump.
Check that the cooling pipes are not clogged.
Sensor or wiring faulty Check the temperature reading on HHR as well as
the connections of the sensor on RSV1 TEMP
plug and of the valve on RSV1 VALVES plug
(see
15.4)
.
Roots 1 solenoid water valve problem Check the operation and the connection of the
Roots 1 solenoid valve
(see 7.5) .
Check the power supply of Roots 1 solenoid valve
coil.
Incident Cause Remedy
Incident Cause Remedy
Bad vacuum or no vacuum Polluted or clogged pump FB maintenance
Contact your service center.
Internal oil leak FB maintenance
Contact your service center.
Mechanical noise Damaged ball bearing FB maintenance
Contact your service center.
Rotors seizing FB maintenance
Contact your service center.
Unsynchronized gears FB maintenance
Contact your service center.
No N2 purge Incorrect configuration Reset monitoring configuration ([PURGE CMD]
[ENABLED]) or set the purge manually (
PURGE
key on HHR).