Specifications

Table Of Contents
131
Reference Manual
00809-0100-4026, Rev HA
Section 7: Service and Troubleshooting
November 2014
Service and Troubleshooting
7.2 Troubleshooting overview
Tabl e 7 -1 below gives information on the possible causes of system malfunctions. It also lists the
symptoms and necessary actions to be taken.
Table 7-1. Troubleshooting Chart
Symptom Possible cause Action
No level reading
• Power disconnected
• Data communication cables
disconnected
• Check the power supply
• Check the cables for serial data communication
• Check LED/Display
No HART communication
• COM Port configuration does
not match the connected COM
Port
• Cables may be disconnected
• Wrong HART address is used
• Hardware failure
• HART resistor
• Check that correct COM Port is selected in the HART server (see
“Specifying the COM port” on page 87)
• Check the COM port buffer, “Specifying the COM port” on
page 87
• Check wiring diagram
• Verify that the 250 resistor is in the loop, see Figure 4-23 on
page 70
•Check cables
• Make sure that correct HART short address is used. Try address
= 0
• Check the COM Port Buffer setting, see page 88
• Check Analog Output current value to verify that transmitter
hardware works
Analog Out is set in Alarm
•Measurement failure or
transmitter failure
• Open the Diagnostics window in RRM to check active errors
and alarms, see “Diagnostics” on page 145
•See also Analyzing the measurement signal” on page 132 and
Analog Output status” on page 158
Incorrect level reading
• Configuration error
• Disturbing objects in the tank
• See Application errors” on
page 159
• Check the Tank Height parameter; RRM>Setup>Tank
• Check status information and diagnostics information, see
“Diagnostics” on page 145
• Check that the transmitter has not locked on an interfering
object
•See Analyzing the measurement signal” on page 132
Integral display does not work
• Check the display configuration in RRM (open menu Setup >
General)
•Diagnostics
• Contact Emerson Process Management Service Department
(1)
(1) A malfunctioning display panel may only be replaced by service personnel at the Emerson Process Management Service Department.
Temperature measurement failure
• Check ambient temperature
(2)
•Restart gauge
• Contact Emerson Process Management Service Department
(2) If the Rosemount 5400 Series transmitter has been exposed to temperatures outside the specified limits, the device may stop its normal operation.
Level measurement failure
• Check Power Supply
• Check the gauge configuration
• Check that the mechanical installation is correct
Volume measurement failure
•Restart gauge
• Check gauge configuration using PC Based configuration tool
No surface echo
• Check signal strength
• Restart transmitter
•See Analyzing the measurement signal” on page 132