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11.4. Device Display Loop
Device
m
display
3
‹
Consumption:
Example
12387.864 m
3
Radio: activated
11.5. Overview Alarm Codes
Alarm Code
Type
A0
No Alarm
A1
Potential leak
A2
Meter/radio com-
munication error
A4
Meter/radio com-
munication error
A10
Meter alarm
A20
Burst pipe
A40
Backflow
A100
No Usage
A400
Low battery
A4000
Max. flow rate
exceeded
A10000
Min. Temp. Alarm
A20000
Max. Temp. Alarm
A40000
Meter failure
If multiple alarms occur at the same time, the sum of the alarm codes will be displayed.
Determination of existing alarms
A540
Alarme code in display
Action: Substract the identical or next smaller
-A400
Alarm code --> Alarm A400: Low battery
A140
Intermediate result
Action: Substract the identical or next smaller
-A100
Alarm Code --> Alarm A100 : No Usage
A40
Intermediate result
Action: Substract the identical or next smaller
-A40
Alarm Code --> Alarm A40 : Backflow
A0
End
Example: Alarm Code A540 --> Low battery (A400),
No Usage (A100) and Backflow (A40) occur at the
same time
All alarms are content of the radio protocol
GWF AG
Obergrundstrasse 119
6005 Lucerne, Switzerland
L
‹
‹
/h
Flow rate:
Alarm Code
1478 L/h
Description
–
A continuous flow for a long
period of time is detected
Internal transmission incorrect
No internal transmission
Magnetic tampering or impact
of EMC or mechanical damage
detected
High consumption in a short term
is detected
A flow in opposite direction is
detected
No consumption for a long period
of time detected
Remaining battery
lifetime < 183 days
Water meter was used above
defined flow rate
Water meter was used below
defined Temp.
Water meter was used above
defined Temp.
Metrological error
T +41 41 319 50 50
info@gwf.ch, www.gwf.ch
‹
‹
CRC32 value of the
FW version of the
legally relevant
legally relevant
firmware (shown
firmware (shown
every 6th cycle)
every 6th cycle)
Troubleshooting
–
Check water network/system/taps against leakages Yes
If this condition persists, replace the meter
If this condition persists, replace the meter
Check for magnetic tampering, impact of EMC
or mechanical damage. If this condition persists,
replace the meter
Check water network and if necessary close shut-
off valve
Check water network and meter installation
Check meter installation to ensure, meter is
installed
Change device
Check water network parameters and/or install
larger meter size
Check ambient and medium temp. on site
Check ambient and medium temp. on site
Replace the meter
EU declaration of conformity
Manufacturer
GWF AG, Obergrundstrasse 119, 6005 Lucerne, Switzerland
Product
Water meter
Type, model
MTK3...
Product marking
MTK3...
Unico2...
EU Directives
2014/32/EU ─ MID
www.metas.ch/certsearch
Normative
MTK3...
Unico2...
Type examination
CH-MI001-07005 / CH-MI001-07004,
MID – 2014/32/EU Annex II, module B
Eidgenössisches Institut für Metrologie, METAS-Cert
CH-3003 Bern-Wabern, Notified Body 1259
Surveillance procedure 2014/32/EU Annex II, module D
Eidgenössisches Institut für Metrologie, METAS-Cert
CH-3003 Bern-Wabern, Notified Body 1259
We declare as manufacturer:
Products labelled accordingly are manufactured according of the listed Directives and
Standards. They correspond to the tested type samples. The production is subject to the
stated surveillance procedure.
Place and date
Lucerne, 01.02.2023
01.07.2018
Markus Helfenstein
Senior VP R&D
Technical support:
T +41 41 319 52 00, support@gwf.ch
‹
‹
ft
GA
Lm
T
3
3
‹
/min
/h
Display test
Display test
„ALL ON"
„ALL OFF"
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
MTW3...
Unico2...
Unico3...
Mxx 1259
MTW3...
CH-MI001-07005
Unico3...
CH-MI001-07004
MTW3...
OIML R49-1:2013, EN 14154-1:2011,
EN ISO 4064-1:2017
Unico3...
OIML R49:2006, EN 14154:2011
Thomas Birrer
Head of Metrology Laboratory
Subject to modification, 08.11.2023 – BAe10122
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