ABB LevelMaster 7100, Руководство пользователя, Страница: 92 / 100

LevelMaster 7100 User manual 2105835 Rev AA | 82
increase sensor efficiency and gain may have to be reduced
until the alarm clears.
0100 Temp No temperature reading
If the level is reading correctly then the RTD may have failed.
If so, replace the sensor.
0200 Temp
Calculated temperature error value below 0 or
above 255 °F
Temperature is out of range.
1000
Float 1
(W ater)
Detection of broken primary coil
Primary coil may be broken. Use the sensor test box to test
primary winding.
2000
Float 1
(W ater)
No float
Float not recognized
Float battery dead
Float malfunction
A to D gain too low
A to D gain may be too low. Use test cable and the
MasterLink program to increase the gain of the analog-to-
digital converter. If this does not solve the problem, the
bottom float may be malfunctioning. Remove the sensor and
replace the float.
2002
Float 1
(W ater)
No oil or water float recognized. See codes 0002 and 2000.
4000
Float 1
(W ater) Analog-to-digital converter saturation, or sensor
failure
Gain too high. Reduce gain, or replace sensor.
5000
Float 1
(W ater)
Level bias calculation error. Compensated value
below 0” or above 655”, or wrong calibration file
for this hardware (board/sensor)
Check the value entered for level offset for the top float and
verify it has been entered correctly.
Troubleshooting a new installation
Use Table 10 for troubleshooting a new installation. If rewiring is required refer to section 4, Wiring , for port pinout details.
IMPORTANT NOTE : To help determine which type of problem is occurring, use the following table to help narrow
the possibilities. In the following procedures, specific wiring information is called by the common name for a
component, followed by its jumper number (abbreviated J) and pin number (for example: V-BATT, J4-1.) If the
host hardware is a 6790 RTU, locate the correct pins on the RTU termination board. If the host hardware is an
XRC, replace the J4 jumper number with the correct pins on the J6 jumper.
For other flow computers and remote controller models, refer to the specific user manuals for pinout details.
Table 10: Troubleshooting new installations
Error condition Check Procedure
Hardware wiring
Board to T+ wiring
Verify wiring from host hardware board to LevelMaster board (J1) is
correct.
Verify board jumper settings (JP1) on legacy boards are correct. See
section 4.1.3,
Onboard termination jumpers (legacy boards only) .
Board to barrier wiring Verify that host hardware board wiring to optional barrier board is correct.
Barrier to board wiring Verify that optional barrier board wiring to LevelMaster board is correct.
Red light on LevelMaster board
not blinking during a poll
Verify that T+ and T- wires are not reversed.
Compare host voltage to
LevelMaster voltage
If no voltage is received at the LevelMaster, the barrier may be blown.
If the voltage received at the LevelMaster is greater than or less than the
host voltage, the power side of the barrier may be blown.
The newer CSA barriers exhibit a 1 volt drop from the host to the
LevelMaster side.
In older UL barriers, the ground may be fused and can show smaller or
even greater voltage than the LevelMaster is providing. This is due to a
“floating ground.” The current (mA) in these cases will be near zero.
Continuity can be checked to trace parted power wire problems. Be sure to
trace the wiring for polarity before supplying power.