Four Way Valve Switching; Heat Pump - Daikin Altherma EKHBH Series Service Manual

ESIE06-03
1.3

Four Way Valve Switching

Outline of heating

Heat pump

operation
During the heating operation current must be conducted and during cooling and defrosting current
must not be conducted. In order to eliminate the switching sound (as the four way valve coil switches
from ON to OFF) when the heating is stopped, the delay switch of the four way valve must be carried
out after the operation stopped.
Detail The OFF delay of four way valve.
Energize the coil for 150 sec after unit operation is stopped.
Part 2 – Functional Description
General Functionality
2
2–5
1
3
4
5