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28
14 Frequently Asked Questions
Issue Cause Solution
A Cylinder not charging
A.3 Temperature setpoint
not set correctly
A.4 Direct heating
malfunction
A.5 Direct heating high limit
thermostat has tripped
A.1 Ensure both power supplies are
turned on
A.3 Set Primary setpoint (Section
11.2.4)
immersion heater
A.5 Reset limit thermostat(s) and in
form installer
B The water in the
cylinder is too hot
B.1 Primary/Boost
temperature setpoint is
too high
B.2 Hygiene mode overriding
primary setpoint
B.3 Temperature sensors
faulty or not installed
correctly
B.1 Check/adjust the primary and
boost temperature setpoints
(Section 11.2.4)
B.2 Check/adjust the Hygiene setpoint
(Section 7.2.2)
B.3 Check temperature displayed for
accuracy (Section 11.2.6), if
clearly incorrect contact supplier
C Hot water runs out
during the day
C.1 Cylinder not storing
enough energy to meet
daily requirements
C.2 Increased usage
resulted in hot water
running out earlier than
usual
C.1 Raising the Primary setpoint in
order to store additional energy
(Section 11.2.4)
C.2 Boost function heats a small
volume of water (Section 11.2.5).
Frequently Asked Questions
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