Chapter 6, Troubleshooting 6-35
The critical register is used to better define the occurrence of a critical
fault, flow fault or air fault. If one of these faults is identified in the fault
register, then the critical register will provide more information about the
fault. Each fault has a hexadecimal code associated with it. If one fault
occurs, one of the codes listed below will be displayed. If two or more
faults occur simultaneously, the actual code displayed will be the sum of
two or more codes. This scenario is likely, because an air detector code
will be summed with the fault code if the air detector is sensing air at the
time the fault is detected.
Table 6-3, Error Codes of the Critical Register
Code Critical Fault Description
000100 Motor Movement Fault The motor has moved during the system
start-up test phase.
000200 Auto Prime Fault An auto prime command has been received
from the CPU after an application state has
been entered.
000400 Interlock Fault The CPU has failed to respond to an open
DPM interlock within one second.
000800 Ratio Fault The pump ratio exceeds the acceptable
range.
001000 ACAD Status ACAD was sensing air when fault occurred.
002000 DLAD1 Status DLAD1 was sensing air when fault
occurred.
004000 DLAD2 Status DLAD2 was sensing air when fault
occurred.
Critical
Register
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