
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Model BB4000 Controller Instruction Manual
9.7. Fault Code Table
f
ault
C
oDe
D
eSCriPtion
of
C
onDition
0
Normal
1
Communication Fault - Overrun Error reading incoming message.
2
Communication Fault - Time out error reading incoming message.
3
Communication Fault - Time out error responding to message.
4
Communication Fault - Incoming message failed Checksum Test.
5
Communication Fault - Invalid Modbus Function Code.
6
Communication Fault - Trying to preset more than 35 registers using Function Code No. 16.
7
Communication Fault - Trying to force to more than 100 Coils using Function Code No. 15.
8
Parameter Setup Fault - More than one Discrete Input is assigned to the same Function.
9
Parameter Setup Fault - Pump On & Pump Off parameters are set too close together. (They
must be at least 0.2 feet apart with P.36 = 1, or 2 feet apart with P.36 = 0, or 0.02 feet apart
with P.36 = 2.)
10
Parameter Setup Fault - Pump On & Pump Off parameters are upside down. (Pump Off Level
must be lower than the Pump On Level, for a pump down application.
11
VFD Speed Reference Setup Fault - Level at Minimum Speed is set too close to Level at 100%
speed. (They must be at least 0.5 feet apart with P.36 = 1, or 5 feet with P.36 = 0, or 0.05 feet
with P.36 = 2.)
12
VFD Speed Reference Setup Fault - Level at Minimum Speed and Level at 100% speed are
backwards.
13
Communication Fault - The UART detected a Framing Error reading the incoming message. It
did not find Stop Bit where expected.
14
Communication Fault - Noise Detected on incoming message.
15
Normal Pump Operation Disabled - Discrete Input programmed for Function 31 is closed.
Pump Operation will only be allowed from Float Backup or Level Probe Backup.
16
Pump Operation on Float Backup.
17
Backup Float Switch Out of Sequence.
Note: Fault will clear when normal operation is verified.
18
All Pump Disable - Discrete Input programmed for Function 8 is closed (Typically connected to
Phase Monitor).
19
One of the Pump On or Pump Off level control Parameters (or Parameters P.21, P.22, P.42, or
P.43) is set too low. One of them is set in the part of the display range that is artificially created
by the Level Offset Parameter F.21. See page 5 for a description of Parameter F.21. All level
control Parameters must be set higher than what is set on Parameter F.21.
20
Level Probe Fault - Test Signal Status Below Normal Range. See Parameter L.11 on page 10.