Installation Guide

Operation Guide
Troubleshooting
7
MODEL kW kW kW
AT900-03 1 2 3
AT900-04 1.6 2.2 3.8
AT900-06 3 3.5 6.5
AT900-08 3.8 4.7 8.5
AT900-10 5.25 5.25 10.5
AT900-13 4.5 8.5 13
PROBLEM ISSUE POSSIBLE CAUSE SOLUTION
Water not hot
enough.
Too much water owing
through the heater.
Reduction in the ambient
temperature.
Water Pressure below of
0.5 bar (7 psi).
Electrical Malfunction.
Reduce the ow rate of the water via
the outlet tap.
Switch to higher temperature setting.
Check if the main water line stop
valve is fully open and that there
are no other restrictions in the water
supply line.
Have the Heater unit check by a
qualied eIectrician or contact your
local authorized distributor.
Low Medium High