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9. WARRANTY AND SERVICE
The reliable operation of heat meters is guaranteed for 12 months from the commissioning date, pro-
vided that operation will meet the requirements provided in this document. The warranty does not
include damage caused by improper shipping or operation. The users rights from the warranty are
void and null if unauthorised persons repair the product without permission of the manufacturer (by
breaking the seals).
The warranty is void and null when the following is found:
• repairs made by personnel unauthorised to perform warranty service;
• unauthorised removal of seals;
• modifications and changes of design;
• installation or operation considered as unintented use in the user manual;
• mechanical damage to the resolver enclosure.
Elf heat meters self-diagnose by indication of error codes. Specific error codes are only displayed
during an emergency/failure; if the error signal cause is removed, the error signal will be automatically
reset. Example: water hammering may occur during opening or closing the flow, which cause error
32 – overflow; if the error signal is reset, there is no need to call the service. In the same way, error 2
is normal when the flow is actually isolated; however, service assistance will be necessary if the error
code is not reset when the flow is opened, since it means a fault of the flow transducer has occured.
The following table presents the troubleshooting procedures for Elf.
Problem Cause Remedy
LCD blank, push-button non-
responsive
The battery is dead or
damaged
Bring the product to the
manufacturer technical service
Error 4 or 8 persists
The corresponding
temperature sensor has failed
Bring the product to the
manufacturer technical service
The heat meter is suspected
of under or overmetering
The intake lter of the ow
transducer is clogged or
undermetering is caused by
incorrect installation of the
temperature sensors
The heat provider service must
make sure that the supply pipe is
unobstructed and that the sensors
have been properly installed; if
both are not correct, bring the
product to the manufacturer
technical service
Error 2 present
The cut-off valve is closed Open the valve
The intake lter of the ow
transducer is clogged
The heat provider service must
make sure that the supply pipe is
not clogged; if it is unobstructed
and the error persists, bring the
product to the manufacturer
technical service
Error 16 present
The temperature sensors have
been interchanged during
installation
The heat provider technical
service must interchange the
sensor installation
9.1. Recommendations for end of life
The water meters are designed for five years of uninterrupted operation. Specific maintenance action is
necessary for operation after this period. The minimum scope of maintenance is to replace the batteries
and reassess the metrological performance.
The battery must be replaced by a qualified technician; it requires breaking the housing seals and sol-
dering. Flow meter handling and disposal requirements are the same as for household water meters.
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