B800-00-880 Issue D
Page 72
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Maintenance
5.5.3
Controller run time
The run hours and recommended service time of the controller on the nEXT pump can be monitored by sending the
following query:
The reply will be as follows, where the first number is the hours run by the controller and the second is the number
of hours until service is recommended:
Note that the number of hours until the next service is due is estimated by the controller based on the operating
conditions of the pump and therefore may reduce at more or less that 1 hour per hour. The dominant factor in
extending controller life is reduced pump temperature.
5.5.4
Pump run time
The run hours and recommended service time of the impeller in the nEXT pump can be monitored by sending the
following query:
The reply will be as follows, where the first number is the hours run by the impeller and the second is the number of
hours until service is recommended:
5.5.5
Pump cycles
The number of start-stop cycles completed and the number remaining until the next service is due can be monitored
by sending the following query:
The reply will be as follows, where the first number is the start-stop cycles completed by the pump and the second
is the number of start-stop cycles until service is recommended:
7
Service due
Service is due. Specific operation required should be
determined by checking the bits above
8 - 31
Reserved
-
Command
?
V
8
8
1
cr
Reply
=
V
8
8
2 sp
d
d
d
d
d
d
;
d
d
d
d
d
d
cr
Command
?
V
8
8
3
cr
Reply
=
V
8
8
3 sp
d
d
d
d
d
d
;
d
d
d
d
d
d
cr
Command
?
V
8
8
4
cr
Reply
=
V
8
8
4 sp
d
d
d
d
d
d
;
d
d
d
d
d
d
cr
Table 27 - Service flags (continued)
Bit number
Status flag
Active flag means
