Daikin Altherma HT Service Manual

Operation Mode ESIE09-08B
46 Function
1. Operation Mode
Startup control
•
Yes
No
No
Malfunction/Standby
Normal operation
•
•
• Protection control
• Pump PI control
Indoor unit thermostat ON
Yes
Defrosting operation
Indoor unit thermostat ON
Note:
Malfunction/Standby
(V3152)
Operation in
stop mode
Indoor unit stop or
thermostat OFF
Pressure
equalization
prior to startup
Restart standby
(Compressor stop)
Indoor unit stop or
thermostat OFF
Pump-down
residual
operation
Malfunction /
Standby
Heating startup
control
Indoor unit stop or
thermostat OFF
Electronic expansion
valve PI control
Heating operation
Malfunction /
Standby
Defrost IN
conditions are met.
Operation
mode c
hange
In the event indoor unit stops or the thermostat
turns OFF while in defrosting operation,
pump-down residual operation is performed on
completion of defrosting operation.
Compressor PI control
3-way valve change
over between DHW
and SPH

Daikin Altherma HT Specifications

General

Type	Air-to-water heat pump
Refrigerant	R-410A
Water Outlet Temperature	Up to 80°C
Operating Temperature Range	-20°C to 35°C
Power Supply	3-phase, 400V
Energy Efficiency Class (Heating)	A++