Troubleshooting Proline Promag 53 MODBUS RS485
96 Endress+Hauser
9 Troubleshooting
9.1 Troubleshooting instructions
Always start troubleshooting with the checklist below, if faults occur after startup or during
operation. The routine takes you directly to the cause of the problem and the appropriate remedial
measures.
Check the display
No display visible and no
output signals present.
1. Check the supply voltage → Terminals 1, 2
2. Check device fuse → ä 112
85 to 260 V AC: 0.8 A slow-blow / 250 V
20 to 55 V AC and 16 to 62 V DC: 2 A slow-blow / 250 V
3. Measuring electronics defective → order spare parts → ä 107
No display visible, but
output signals are present.
1. Check whether the ribbon-cable connector of the display module is correctly plugged
into the amplifier board → ä 107
2. Display module defective → order spare parts → ä 107
3. Measuring electronics defective → order spare parts → ä 107
Display texts are in a
foreign language.
Switch off power supply. Press and hold down both the OS keys and switch on the
measuring device. The display text will appear in English (default) and is displayed at
maximum contrast.
Measured value indicated,
but no signal at the current
or pulse output
Measuring electronics defective → order spare parts → ä 107
▼
Error messages on display
Errors which occur during commissioning or measuring operation are displayed immediately. Error messages consist of a
variety of icons. The meanings of these icons are as follows (example):
– Type of error: S = system error, P = process error
– Error message type: $ = fault message, ! = notice message
– EMPTY PIPE = Type of error, e.g. measuring tube is only partly filled or completely empty
– 03:00:05 = Duration of error occurrence (in hours, minutes and seconds)
– #401 = error number
"
Caution!
• See the information on → ä 60.
• The measuring system interprets simulations and positive zero return as system errors, but displays them as notice
messages only.
Error number:
No. 001 - 399
No. 501 - 699
System error (device error) has occurred→ ä 97
Error number:
No. 401 - 499
Process error (application error) has occurred→ ä 102
▼
Other error (without error message)
Other errors are present Diagnosis and rectification → ä 104
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