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Bit number
Status ag Acve ags means
14 Thermistor error
Pump internal temperature measurement
system disconnected or damaged
15 Serial control mode interlock
Serial enable has become inacve
following a serial Start command
Table 34 The system status word used in the example above was taken when the pump is not in
operaon. Decode the word for more informaon about the state of the pump.
Table 35
Example decoding of system status words
Bit
number
Status of bit (in example)
Indicaon
0 0 The pump has not failed
1 1 The pump is at rest
2 0 Speed is below normal speed
3 0 The vent valve is open
4 0 There is no acve start command
5 1 Serial enable is acve
6 0 Standby is not acve
7 0 Speed is below 50% of full rotaonal speed
8 0 The pump is not in parallel control mode
9 0 The pump is not in serial control mode
10 0
There is no controller internal soware
mismatch
11 0
Controller passed internal conguraon and
calibraon operaon
12 0 The mer has not med out
13 0 Overspeed and overcurrent trip not acvated
14 0
Pump internal temperature measurement
system is ne
15 0
Serial enable has not become inacve during
serial control
8.5 Service informaon
If you use the serial communicaons link, addional informaon about the pump (such
as pump type and internal controller soware versions) can be accessed. This
informaon is useful for the service personnel to select the model of the pump.
Send the query that follows to nd out the pump type:
Command ? s 8 5 1 cr
The reply is as follows (where, String 1 is the pump type, String 2 is the DSP soware
version number and String 3 is the designated full speed of the pump (in
revoluons per second)):
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B8G000880_D - Fault nding