KRAL BEM 500 - Page 39

14 Troubleshooting
14.1 Fault table
Fault message Cause and elimination
8.06Alarm Bypass
valve activated. Check
volumeter!
Relay2 for collective error message is active, Relay1 for bypass valve has dropped.
o Check flowmeter for blockage.
o Optimize settings in the menu items3.13–3.16 .
In case of independent measurement with two flowmeters:
o If bypass function is not desired, 3.14Setting Limit value bypass Set to0 .
o Reset the bypass and group error message, see 1.10Display reset bypass and group error
message.
8.07Alarm Max. FlowB
exceeded. Check pick
up!
The maximum permissible flow rate was exceeded in flowmeterA.
o Limit the flow rate.
o Check flowmeter.
o Use a larger size.
o Check and eliminate an electromagnetic interference using an oscilloscope (e.g. terminate shield
to Gnd).
8.08 Alarm VolumeterA
orB outside the
temperature range!
At least one of the measured temperatures of the connected flowmeter lies outside the permissible
range.
o Adjust temperature range of the flowmeters, see 2.19Setting Minimum temperature volumeter
or 2.20Setting Maximum temperature volumeter.
o Limit the temperature in the system.
o Use suitable sensors.
o Use suitable flowmeters.
8.09Alarm analog
output1 or 2 scaling
exceeded!
The flow rate exceeds the maximum scale value of an analog output.
o Correct the scale, see 3.03Setting Scale max. analog output1 or 3.05Setting Scale analog
max. output2.
8.10Alarm pulse
output1 or 2 max.
frequency exceeded!
The maximum output frequency of Pulse output1 or2 has been exceeded.
o Correct the scale, see 3.09Setting Scale pulse output1 or 3.11Setting Scale pulse output2.
o Correct the pulse width, see 3.12Setting Pulse output pulse width setting.
The maximum frequency of a pulse output amounts to:
o Mode Encoder: 1/(4 x pulse width ins)
o Mode Independent: 1/(2 x pulse width ins)
8.11 Alarm Change of
direction B exceeded,
check 30/s signals!
A pick up at flowmeter A has failed.
This error message is only displayed at the setting Function pulse inputs Encoder, see 2.13Setting
Function pulse inputs
o Check pulse inputs channelA (terminal7+19):
a)Square wave signal at both inputs: >30 direction change/s
-or-
b)Square wave signal at an input: Strong vibration (in case of standstill of the flowmeter)
-or-
c)A pick up delivers no signal (with running flowmeter)
With c):
o Check the connection of the corresponding pick up.
o Check the position of the corresponding pick up in the dry sleeve.
o Replace the corresponding pick up.
8.12Alarm Change of
directionB exceeded,
check 30/s signals!
A pick up at flowmeterB has failed.
This error message is only displayed at the setting Function pulse inputs Encoder, see 2.13Setting
Function pulse inputs
o Check pulse inputs channelB (terminals30 +40):
a)Square wave signal on both inputs: >30 direction change/s
-or-
b)Square wave signal at an input: Strong vibration (in case of standstill of the flowmeter)
-or-
c)A pick up delivers no signal (with running flowmeter)
With c):
o Check the connection of the corresponding pick up.
o Check the position of the corresponding pick up in the dry sleeve.
o Replace the corresponding pick up.
8.13Alarm temperature
sensor failure
VolumeterA!
Temperature sensorA or Temperature inputA is defective.
o Check the sensor connection.
o Replace the sensor.
o Check the temperature input.
Operating instructions
OIE 12en-GB Edition 2020-03
39