Operation Mode - Daikin ALTHERMA HT ERSQ 011 AA Service Manual

Operation Mode

1. Operation Mode

Indoor unit stop or
thermostat OFF
Pressure
equalization
prior to startup
Startup control
Heating startup
•
control
Normal operation
• Compressor PI control
• Electronic expansion
valve PI control
• Protection control
• Pump PI control
Heating operation
conditions are met.
54
Operation in
stop mode
Indoor unit thermostat ON
Indoor unit thermostat ON
Malfunction/Standby
Yes
Defrost IN
No
Yes
Operation
mode change
No
Malfunction/Standby
(Compressor stop)
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat OFF
Malfunction /
Standby
Defrosting operation
Note:
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.
Restart standby
Malfunction /
Standby
Pump-down
residual
operation
3-way valve change
over between DHW
and SPH
ESIE09-08A
(V3152)
Function