Endress+Hauser Liquisys M CCM223 - Page 88

Diagnostics and troubleshooting Liquisys M CCM223/253
88 Endress+Hauser
Error
No.
Display Tests/remedial action Alarm
contact
Error
current
Autom.
cleaning
start
PROFIBU
S
Status
Facty Facty Facty PV
1)
User User User Temp
E153 Measuring signal of
pH/mV parameter
delayed or frozen
• Check whether medium
has really changed or
not.
No No No 44
44
E154 Cl/ClO
2
below lower
alarm threshold for
period exceeding
alarm delay
• Perform manual
comparison
measurement if
necessary.
• Service the sensor (in
accordance with sensor
manual).
• Recalibrate the
measuring system.
• Check the flow.
• Check the chemical
supply.
• Check dosing devices.
Yes No No X
X
E155 Cl/ClO
2
above upper
alarm threshold for
period exceeding
alarm delay
Yes No No X
X
E156 Actual Cl/ClO
2
value
undershoots alarm
threshold for longer
than the set
permissible maximum
period
Yes No No X
X
E157 Actual Cl/ClO
2
value
exceeds alarm
threshold for longer
than the set
permissible maximum
period
Yes No No X
X
E158 pH/mV below lower
alarm threshold for
period exceeding
alarm delay
Yes No No X
X
E159 pH/mV above upper
alarm threshold for
period exceeding
alarm delay
Yes No No X
X
E160 Actual pH/mV value
undershoots alarm
threshold (CC
setpoint) for longer
than the set
permissible maximum
period
Yes No No X
X
E161 Actual pH/mV value
exceeds alarm
threshold (CC
setpoint) for longer
than the set
permissible maximum
period
Yes No No X
X
E162 Dosage stop Check settings in the
CURRENT INPUT and
CHECK function groups.
Yes No No X
X
E163 Uncompensated
chlorine value too
imprecise since pH
value > 9
Check pH value and adjust
according to system
requirements. If pH values
> 9, the disinfection effect
is questionable since the
chlorine now exists as the
less effective OCl
-
.
Yes No No X
X