Edwards nEXT nEXT85 - Decoding Service Status Words

If the inner side of the pump is contaminated, it is possible you will not get the
necessary ulmate vacuum performance or the pump-down mes can increase. Return
the pump to our service centre for cleaning. Refer to Return the equipment or
components for service on page 97.
You can use the organic solvent to clean the external surface of the pump. We
recommend you to use non-CFC solvents such as isopropanol or ethanol. Only small
amount of a cleaning soluon is necessary to clean the pump surface.
For environmental reasons, keep wastage of cleaning soluons and solvents to a
minimum.
7.4 Decoding service status words
The service status can be accessed through the serial link. This method of accessing
service status will give the most complete informaon of current and future service
requirements and preventave maintenance acvies can be scheduled.
A summary of the current pending service status is given in response to the service
status command that follows:
Command ? v 8 8 1 cr
The reply is as follows:
Reply = v 8 8 1 sp h h h h h h h h cr
The service status word is made up of 8 hexidecimal digits. To decode the word, convert
each digit into a 4-digit binary number (same as the system status word, given in
Decoding system status words on page 91).
Each binary digit (bit) represents a ag that is acve (state 1) or not acve (state 0). To
help decode the service status word, each bit is numbered (starng with 0 for the least
signicant to 31 for the most signicant) as shown in Decoding system status words on
page 91. The meaning of each bit in the service status word is given in Flashing service
codes on page 90.
Table 27 Service ags
Bit number Status ag Acve ag means
0 Oil cartridge service
due
Set when hours unl oil cartridge service due
= 0
1 Bearing service due Set when hours unl bearing service due = 0
2 Pump service due Set when hours unl pump service due = 0
or cycles unl pump service due = 0
3 Controller service due Set when hours unl controller service due =
0
4 Reserved -
5 Reserved -
6 Reserved -
7 Service due Service is due. Specic operaon necessary
should be determined by checking the bits
above
Page 83
B8G000880_D - Maintenance