Troubleshooting
ESIE13-02
Part 4 – Troubleshooting
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1.2.7
The Unit is Turned on (
d
LED is lit) but the Unit is not Heating or Cooling as
Expected
Applicable models
EHB*CA, EHV*CA, ERHQ011~016*, ERLQ004~016*
Error detection
method
Error generating
condition
Supposed causes -
corrective action
Possible causes
Corrective action
The temperature setting is not correct.
Check the controller set point.
The water flow is too low.
Check that all shut off valves of the water
circuit are completely open.
Check if the water filter needs cleaning.
Make sure there is no air in the system (purge
air).
Check on the manometer that there is
sufficient water pressure. The water pressure
must be >1.5 bar.
Check that the pump speed setting is on the
highest speed.
Make sure that the expansion vessel is not
broken.
Check that the resistance in the water circuit
is not too high for the pump.
The water volume in the installation is too low.
Make sure that the water volume in the installa-
tion is above the minimum required value (refer
to the “Specifications” in databook).
