Daikin Altherma 3 M - Safe Operation Guidelines

1 | General operation
Service manual
8
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
1 General operation
The low temperature monoblock is a Heat Pump system used for domestic heating
and/or cooling applications and can be combined with a domestic hot water tank.
Outdoor units
The outdoor unit consists of:
▪ Inverter compressor
▪ A switchbox containing necessary PCBs to control the refrigerant part
▪ A hydro box containing all PCBs and hydraulic parts to control the space heating/
cooling and optional domestic hot water preparation
▪ An air cooled heat-exchanger with inverter controlled fan
▪ A refrigerant to water heat exchanger with PWM controlled pump
▪ 2 expansion valves (main, and injection)
▪ 2 space heating connections (Water IN and Water Out)
▪ System is controlled via MMI2 room interface
Heating mode
The compressor capacity step is defined by the condensing temperature, which is
calculated through the high pressure sensor read-out.
In defrost or oil return operation the heat exchanger functions as a condenser,
while its fan motor is stopped.
Cooling mode
The compressor capacity step is defined by the evaporation temperature, which is
calculated through the low pressure sensor read-out.